diff --git a/compiler/packages/babel-plugin-react-compiler/src/HIR/Environment.ts b/compiler/packages/babel-plugin-react-compiler/src/HIR/Environment.ts
index 206bfc0bca1a4..90a352620ce35 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/HIR/Environment.ts
+++ b/compiler/packages/babel-plugin-react-compiler/src/HIR/Environment.ts
@@ -246,7 +246,7 @@ export const EnvironmentConfigSchema = z.object({
   /**
    * Enable a new model for mutability and aliasing inference
    */
-  enableNewMutationAliasingModel: z.boolean().default(false),
+  enableNewMutationAliasingModel: z.boolean().default(true),
 
   /**
    * Enables inference of optional dependency chains. Without this flag
diff --git a/compiler/packages/babel-plugin-react-compiler/src/Inference/AnalyseFunctions.ts b/compiler/packages/babel-plugin-react-compiler/src/Inference/AnalyseFunctions.ts
index fff913210347d..c8726f4e4b7bb 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/Inference/AnalyseFunctions.ts
+++ b/compiler/packages/babel-plugin-react-compiler/src/Inference/AnalyseFunctions.ts
@@ -42,8 +42,16 @@ export default function analyseFunctions(func: HIRFunction): void {
            * Reset mutable range for outer inferReferenceEffects
            */
           for (const operand of instr.value.loweredFunc.func.context) {
-            operand.identifier.mutableRange.start = makeInstructionId(0);
-            operand.identifier.mutableRange.end = makeInstructionId(0);
+            /**
+             * NOTE: inferReactiveScopeVariables makes identifiers in the scope
+             * point to the *same* mutableRange instance. Resetting start/end
+             * here is insufficient, because a later mutation of the range
+             * for any one identifier could affect the range for other identifiers.
+             */
+            operand.identifier.mutableRange = {
+              start: makeInstructionId(0),
+              end: makeInstructionId(0),
+            };
             operand.identifier.scope = null;
           }
           break;
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/aliased-nested-scope-truncated-dep.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/aliased-nested-scope-truncated-dep.expect.md
index 933fafff5f1ba..12c7b4d5eab93 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/aliased-nested-scope-truncated-dep.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/aliased-nested-scope-truncated-dep.expect.md
@@ -175,21 +175,14 @@ import {
  * and mutability.
  */
 function Component(t0) {
-  const $ = _c(4);
+  const $ = _c(2);
   const { prop } = t0;
   let t1;
   if ($[0] !== prop) {
     const obj = shallowCopy(prop);
     const aliasedObj = identity(obj);
-    let t2;
-    if ($[2] !== obj) {
-      t2 = [obj.id];
-      $[2] = obj;
-      $[3] = t2;
-    } else {
-      t2 = $[3];
-    }
-    const id = t2;
+
+    const id = [obj.id];
 
     mutate(aliasedObj);
     setPropertyByKey(aliasedObj, "id", prop.id + 1);
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-2-iife.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-2-iife.expect.md
index 2afc5fd25dbac..50480f1b2515e 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-2-iife.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-2-iife.expect.md
@@ -25,17 +25,25 @@ export const FIXTURE_ENTRYPOINT = {
 ```javascript
 import { c as _c } from "react/compiler-runtime";
 function bar(a) {
-  const $ = _c(2);
-  let y;
+  const $ = _c(4);
+  let t0;
   if ($[0] !== a) {
-    const x = [a];
+    t0 = [a];
+    $[0] = a;
+    $[1] = t0;
+  } else {
+    t0 = $[1];
+  }
+  const x = t0;
+  let y;
+  if ($[2] !== x[0][1]) {
     y = {};
 
     y = x[0][1];
-    $[0] = a;
-    $[1] = y;
+    $[2] = x[0][1];
+    $[3] = y;
   } else {
-    y = $[1];
+    y = $[3];
   }
   return y;
 }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-3-iife.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-3-iife.expect.md
index f0267c3309f5b..9678918b3d27f 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-3-iife.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-3-iife.expect.md
@@ -29,20 +29,29 @@ export const FIXTURE_ENTRYPOINT = {
 ```javascript
 import { c as _c } from "react/compiler-runtime";
 function bar(a, b) {
-  const $ = _c(3);
-  let y;
+  const $ = _c(6);
+  let t0;
   if ($[0] !== a || $[1] !== b) {
-    const x = [a, b];
+    t0 = [a, b];
+    $[0] = a;
+    $[1] = b;
+    $[2] = t0;
+  } else {
+    t0 = $[2];
+  }
+  const x = t0;
+  let y;
+  if ($[3] !== x[0][1] || $[4] !== x[1][0]) {
     y = {};
     let t = {};
 
     y = x[0][1];
     t = x[1][0];
-    $[0] = a;
-    $[1] = b;
-    $[2] = y;
+    $[3] = x[0][1];
+    $[4] = x[1][0];
+    $[5] = y;
   } else {
-    y = $[2];
+    y = $[5];
   }
   return y;
 }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-4-iife.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-4-iife.expect.md
index 22728aaf4323d..edddf3715a453 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-4-iife.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-4-iife.expect.md
@@ -25,17 +25,25 @@ export const FIXTURE_ENTRYPOINT = {
 ```javascript
 import { c as _c } from "react/compiler-runtime";
 function bar(a) {
-  const $ = _c(2);
-  let y;
+  const $ = _c(4);
+  let t0;
   if ($[0] !== a) {
-    const x = [a];
+    t0 = [a];
+    $[0] = a;
+    $[1] = t0;
+  } else {
+    t0 = $[1];
+  }
+  const x = t0;
+  let y;
+  if ($[2] !== x[0].a[1]) {
     y = {};
 
     y = x[0].a[1];
-    $[0] = a;
-    $[1] = y;
+    $[2] = x[0].a[1];
+    $[3] = y;
   } else {
-    y = $[1];
+    y = $[3];
   }
   return y;
 }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-iife.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-iife.expect.md
index 60f829cdc4d66..c9ce6dda9f627 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-iife.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/capturing-function-alias-computed-load-iife.expect.md
@@ -24,17 +24,25 @@ export const FIXTURE_ENTRYPOINT = {
 ```javascript
 import { c as _c } from "react/compiler-runtime";
 function bar(a) {
-  const $ = _c(2);
-  let y;
+  const $ = _c(4);
+  let t0;
   if ($[0] !== a) {
-    const x = [a];
+    t0 = [a];
+    $[0] = a;
+    $[1] = t0;
+  } else {
+    t0 = $[1];
+  }
+  const x = t0;
+  let y;
+  if ($[2] !== x[0]) {
     y = {};
 
     y = x[0];
-    $[0] = a;
-    $[1] = y;
+    $[2] = x[0];
+    $[3] = y;
   } else {
-    y = $[1];
+    y = $[3];
   }
   return y;
 }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.invalid-impure-functions-in-render.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.invalid-impure-functions-in-render.expect.md
index a67d467df8cfd..0fb17a8f6eab4 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.invalid-impure-functions-in-render.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.invalid-impure-functions-in-render.expect.md
@@ -20,7 +20,7 @@ function Component() {
   2 |
   3 | function Component() {
 > 4 |   const date = Date.now();
-    |                ^^^^^^^^ InvalidReact: Calling an impure function can produce unstable results. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#components-and-hooks-must-be-idempotent). `Date.now` is an impure function whose results may change on every call (4:4)
+    |                ^^^^^^^^^^ InvalidReact: Calling an impure function can produce unstable results. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#components-and-hooks-must-be-idempotent). `Date.now` is an impure function whose results may change on every call (4:4)
 
 InvalidReact: Calling an impure function can produce unstable results. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#components-and-hooks-must-be-idempotent). `performance.now` is an impure function whose results may change on every call (5:5)
 
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.invalid-non-imported-reanimated-shared-value-writes.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.invalid-non-imported-reanimated-shared-value-writes.expect.md
index f1399a41b6fec..d3bb7f413622b 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.invalid-non-imported-reanimated-shared-value-writes.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.invalid-non-imported-reanimated-shared-value-writes.expect.md
@@ -27,7 +27,7 @@ function SomeComponent() {
    9 |   return (
   10 |     <Button
 > 11 |       onPress={() => (sharedVal.value = Math.random())}
-     |                       ^^^^^^^^^ InvalidReact: Mutating a value returned from a function whose return value should not be mutated. Found mutation of `sharedVal` (11:11)
+     |                       ^^^^^^^^^ InvalidReact: This mutates a variable that React considers immutable. Found mutation of `sharedVal` (11:11)
   12 |       title="Randomize"
   13 |     />
   14 |   );
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.mutate-hook-argument.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.mutate-hook-argument.expect.md
index 665fc7053b788..dd98f22530713 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.mutate-hook-argument.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.mutate-hook-argument.expect.md
@@ -16,6 +16,8 @@ function useHook(a, b) {
   1 | function useHook(a, b) {
 > 2 |   b.test = 1;
     |   ^ InvalidReact: Mutating component props or hook arguments is not allowed. Consider using a local variable instead (2:2)
+
+InvalidReact: Mutating component props or hook arguments is not allowed. Consider using a local variable instead (3:3)
   3 |   a.test = 2;
   4 | }
   5 |
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.not-useEffect-external-mutate.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.not-useEffect-external-mutate.expect.md
index 7d829fe9b013f..8c08efee8d894 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.not-useEffect-external-mutate.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.not-useEffect-external-mutate.expect.md
@@ -21,6 +21,8 @@ function Component(props) {
   4 |   foo(() => {
 > 5 |     x.a = 10;
     |     ^ InvalidReact: Writing to a variable defined outside a component or hook is not allowed. Consider using an effect (5:5)
+
+InvalidReact: Writing to a variable defined outside a component or hook is not allowed. Consider using an effect (6:6)
   6 |     x.a = 20;
   7 |   });
   8 | }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.reassignment-to-global-indirect.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.reassignment-to-global-indirect.expect.md
index e4073947f7e15..503ca7df7be46 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.reassignment-to-global-indirect.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.reassignment-to-global-indirect.expect.md
@@ -21,6 +21,8 @@ function Component() {
   3 |     // Cannot assign to globals
 > 4 |     someUnknownGlobal = true;
     |     ^^^^^^^^^^^^^^^^^ InvalidReact: Unexpected reassignment of a variable which was defined outside of the component. Components and hooks should be pure and side-effect free, but variable reassignment is a form of side-effect. If this variable is used in rendering, use useState instead. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#side-effects-must-run-outside-of-render) (4:4)
+
+InvalidReact: Unexpected reassignment of a variable which was defined outside of the component. Components and hooks should be pure and side-effect free, but variable reassignment is a form of side-effect. If this variable is used in rendering, use useState instead. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#side-effects-must-run-outside-of-render) (5:5)
   5 |     moduleLocal = true;
   6 |   };
   7 |   foo();
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.reassignment-to-global.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.reassignment-to-global.expect.md
index 4619cd27cb24d..ec764b7ff27e3 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.reassignment-to-global.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.reassignment-to-global.expect.md
@@ -18,6 +18,8 @@ function Component() {
   2 |   // Cannot assign to globals
 > 3 |   someUnknownGlobal = true;
     |   ^^^^^^^^^^^^^^^^^ InvalidReact: Unexpected reassignment of a variable which was defined outside of the component. Components and hooks should be pure and side-effect free, but variable reassignment is a form of side-effect. If this variable is used in rendering, use useState instead. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#side-effects-must-run-outside-of-render) (3:3)
+
+InvalidReact: Unexpected reassignment of a variable which was defined outside of the component. Components and hooks should be pure and side-effect free, but variable reassignment is a form of side-effect. If this variable is used in rendering, use useState instead. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#side-effects-must-run-outside-of-render) (4:4)
   4 |   moduleLocal = true;
   5 | }
   6 |
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.todo-repro-named-function-with-shadowed-local-same-name.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.todo-repro-named-function-with-shadowed-local-same-name.expect.md
index 2a935256d7a0d..8dd58594ecc64 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.todo-repro-named-function-with-shadowed-local-same-name.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.todo-repro-named-function-with-shadowed-local-same-name.expect.md
@@ -22,7 +22,7 @@ function Component(props) {
    7 |     return hasErrors;
    8 |   }
 >  9 |   return hasErrors();
-     |          ^^^^^^^^^ Invariant: [hoisting] Expected value for identifier to be initialized. hasErrors_0$15 (9:9)
+     |          ^^^^^^^^^ Invariant: [InferMutationAliasingEffects] Expected value kind to be initialized. <unknown> hasErrors_0$15:TFunction (9:9)
   10 | }
   11 |
 ```
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect-optional-chain.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect-optional-chain.expect.md
index e4560848dd5f2..b9aafe41df26e 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect-optional-chain.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect-optional-chain.expect.md
@@ -48,7 +48,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Logs
 
 ```
-{"kind":"CompileError","fnLoc":{"start":{"line":5,"column":0,"index":139},"end":{"line":12,"column":1,"index":384},"filename":"mutate-after-useeffect-optional-chain.ts"},"detail":{"reason":"This mutates a variable that React considers immutable","description":null,"loc":{"start":{"line":10,"column":2,"index":345},"end":{"line":10,"column":5,"index":348},"filename":"mutate-after-useeffect-optional-chain.ts","identifierName":"arr"},"suggestions":null,"severity":"InvalidReact"}}
+{"kind":"CompileError","fnLoc":{"start":{"line":5,"column":0,"index":139},"end":{"line":12,"column":1,"index":384},"filename":"mutate-after-useeffect-optional-chain.ts"},"detail":{"reason":"Updating a value used previously in an effect function or as an effect dependency is not allowed. Consider moving the mutation before calling useEffect()","description":null,"severity":"InvalidReact","suggestions":null,"loc":{"start":{"line":10,"column":2,"index":345},"end":{"line":10,"column":5,"index":348},"filename":"mutate-after-useeffect-optional-chain.ts","identifierName":"arr"}}}
 {"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":9,"column":2,"index":304},"end":{"line":9,"column":39,"index":341},"filename":"mutate-after-useeffect-optional-chain.ts"},"decorations":[{"start":{"line":9,"column":24,"index":326},"end":{"line":9,"column":27,"index":329},"filename":"mutate-after-useeffect-optional-chain.ts","identifierName":"arr"}]}
 {"kind":"CompileSuccess","fnLoc":{"start":{"line":5,"column":0,"index":139},"end":{"line":12,"column":1,"index":384},"filename":"mutate-after-useeffect-optional-chain.ts"},"fnName":"Component","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
 ```
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect-ref-access.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect-ref-access.expect.md
index 5e6f19dd83e65..0d159211a9082 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect-ref-access.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect-ref-access.expect.md
@@ -47,7 +47,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Logs
 
 ```
-{"kind":"CompileError","fnLoc":{"start":{"line":6,"column":0,"index":148},"end":{"line":11,"column":1,"index":311},"filename":"mutate-after-useeffect-ref-access.ts"},"detail":{"reason":"Mutating component props or hook arguments is not allowed. Consider using a local variable instead","description":null,"loc":{"start":{"line":9,"column":2,"index":269},"end":{"line":9,"column":16,"index":283},"filename":"mutate-after-useeffect-ref-access.ts"},"suggestions":null,"severity":"InvalidReact"}}
+{"kind":"CompileError","fnLoc":{"start":{"line":6,"column":0,"index":148},"end":{"line":11,"column":1,"index":311},"filename":"mutate-after-useeffect-ref-access.ts"},"detail":{"reason":"Mutating component props or hook arguments is not allowed. Consider using a local variable instead","description":null,"severity":"InvalidReact","suggestions":null,"loc":{"start":{"line":9,"column":2,"index":269},"end":{"line":9,"column":16,"index":283},"filename":"mutate-after-useeffect-ref-access.ts"}}}
 {"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":8,"column":2,"index":227},"end":{"line":8,"column":40,"index":265},"filename":"mutate-after-useeffect-ref-access.ts"},"decorations":[{"start":{"line":8,"column":24,"index":249},"end":{"line":8,"column":30,"index":255},"filename":"mutate-after-useeffect-ref-access.ts","identifierName":"arrRef"}]}
 {"kind":"CompileSuccess","fnLoc":{"start":{"line":6,"column":0,"index":148},"end":{"line":11,"column":1,"index":311},"filename":"mutate-after-useeffect-ref-access.ts"},"fnName":"Component","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
 ```
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect.expect.md
index 3b61fbf834246..d48d98a1e67f7 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/bailout-retry/mutate-after-useeffect.expect.md
@@ -47,7 +47,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Logs
 
 ```
-{"kind":"CompileError","fnLoc":{"start":{"line":4,"column":0,"index":101},"end":{"line":11,"column":1,"index":222},"filename":"mutate-after-useeffect.ts"},"detail":{"reason":"This mutates a variable that React considers immutable","description":null,"loc":{"start":{"line":9,"column":2,"index":194},"end":{"line":9,"column":5,"index":197},"filename":"mutate-after-useeffect.ts","identifierName":"arr"},"suggestions":null,"severity":"InvalidReact"}}
+{"kind":"CompileError","fnLoc":{"start":{"line":4,"column":0,"index":101},"end":{"line":11,"column":1,"index":222},"filename":"mutate-after-useeffect.ts"},"detail":{"reason":"Updating a value used previously in an effect function or as an effect dependency is not allowed. Consider moving the mutation before calling useEffect()","description":null,"severity":"InvalidReact","suggestions":null,"loc":{"start":{"line":9,"column":2,"index":194},"end":{"line":9,"column":5,"index":197},"filename":"mutate-after-useeffect.ts","identifierName":"arr"}}}
 {"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":6,"column":2,"index":149},"end":{"line":8,"column":4,"index":190},"filename":"mutate-after-useeffect.ts"},"decorations":[{"start":{"line":7,"column":4,"index":171},"end":{"line":7,"column":7,"index":174},"filename":"mutate-after-useeffect.ts","identifierName":"arr"},{"start":{"line":7,"column":4,"index":171},"end":{"line":7,"column":7,"index":174},"filename":"mutate-after-useeffect.ts","identifierName":"arr"},{"start":{"line":7,"column":13,"index":180},"end":{"line":7,"column":16,"index":183},"filename":"mutate-after-useeffect.ts","identifierName":"foo"}]}
 {"kind":"CompileSuccess","fnLoc":{"start":{"line":4,"column":0,"index":101},"end":{"line":11,"column":1,"index":222},"filename":"mutate-after-useeffect.ts"},"fnName":"Component","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
 ```
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/no-emit/retry-no-emit.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/no-emit/retry-no-emit.expect.md
index bd70c0138d7e2..4e73dd6706ed1 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/no-emit/retry-no-emit.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/no-emit/retry-no-emit.expect.md
@@ -52,7 +52,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Logs
 
 ```
-{"kind":"CompileError","fnLoc":{"start":{"line":5,"column":0,"index":163},"end":{"line":13,"column":1,"index":357},"filename":"retry-no-emit.ts"},"detail":{"reason":"This mutates a variable that React considers immutable","description":null,"loc":{"start":{"line":11,"column":2,"index":320},"end":{"line":11,"column":6,"index":324},"filename":"retry-no-emit.ts","identifierName":"arr2"},"suggestions":null,"severity":"InvalidReact"}}
+{"kind":"CompileError","fnLoc":{"start":{"line":5,"column":0,"index":163},"end":{"line":13,"column":1,"index":357},"filename":"retry-no-emit.ts"},"detail":{"reason":"This mutates a variable that React considers immutable","description":null,"severity":"InvalidReact","suggestions":null,"loc":{"start":{"line":11,"column":2,"index":320},"end":{"line":11,"column":6,"index":324},"filename":"retry-no-emit.ts","identifierName":"arr2"}}}
 {"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":7,"column":2,"index":216},"end":{"line":7,"column":36,"index":250},"filename":"retry-no-emit.ts"},"decorations":[{"start":{"line":7,"column":31,"index":245},"end":{"line":7,"column":34,"index":248},"filename":"retry-no-emit.ts","identifierName":"arr"}]}
 {"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":10,"column":2,"index":274},"end":{"line":10,"column":44,"index":316},"filename":"retry-no-emit.ts"},"decorations":[{"start":{"line":10,"column":25,"index":297},"end":{"line":10,"column":29,"index":301},"filename":"retry-no-emit.ts","identifierName":"arr2"},{"start":{"line":10,"column":25,"index":297},"end":{"line":10,"column":29,"index":301},"filename":"retry-no-emit.ts","identifierName":"arr2"},{"start":{"line":10,"column":35,"index":307},"end":{"line":10,"column":42,"index":314},"filename":"retry-no-emit.ts","identifierName":"propVal"}]}
 {"kind":"CompileSuccess","fnLoc":{"start":{"line":5,"column":0,"index":163},"end":{"line":13,"column":1,"index":357},"filename":"retry-no-emit.ts"},"fnName":"Foo","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/reactive-setState.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/reactive-setState.expect.md
index 3af2b9b8b1c89..2329aaed21ad9 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/reactive-setState.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-effect-dependencies/reactive-setState.expect.md
@@ -34,22 +34,28 @@ import { print } from "shared-runtime";
  * setState types are not enough to determine to omit from deps. Must also take reactivity into account.
  */
 function ReactiveRefInEffect(props) {
-  const $ = _c(2);
+  const $ = _c(4);
   const [, setState1] = useRef("initial value");
   const [, setState2] = useRef("initial value");
   let setState;
-  if (props.foo) {
-    setState = setState1;
+  if ($[0] !== props.foo) {
+    if (props.foo) {
+      setState = setState1;
+    } else {
+      setState = setState2;
+    }
+    $[0] = props.foo;
+    $[1] = setState;
   } else {
-    setState = setState2;
+    setState = $[1];
   }
   let t0;
-  if ($[0] !== setState) {
+  if ($[2] !== setState) {
     t0 = () => print(setState);
-    $[0] = setState;
-    $[1] = t0;
+    $[2] = setState;
+    $[3] = t0;
   } else {
-    t0 = $[1];
+    t0 = $[3];
   }
   useEffect(t0, [setState]);
 }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/aliased-nested-scope-truncated-dep.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/aliased-nested-scope-truncated-dep.expect.md
index 933fafff5f1ba..8024676c65a32 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/aliased-nested-scope-truncated-dep.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/aliased-nested-scope-truncated-dep.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 import {
   Stringify,
   mutate,
@@ -101,7 +102,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime";
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 import {
   Stringify,
   mutate,
@@ -175,21 +176,14 @@ import {
  * and mutability.
  */
 function Component(t0) {
-  const $ = _c(4);
+  const $ = _c(2);
   const { prop } = t0;
   let t1;
   if ($[0] !== prop) {
     const obj = shallowCopy(prop);
     const aliasedObj = identity(obj);
-    let t2;
-    if ($[2] !== obj) {
-      t2 = [obj.id];
-      $[2] = obj;
-      $[3] = t2;
-    } else {
-      t2 = $[3];
-    }
-    const id = t2;
+
+    const id = [obj.id];
 
     mutate(aliasedObj);
     setPropertyByKey(aliasedObj, "id", prop.id + 1);
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/aliased-nested-scope-truncated-dep.tsx b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/aliased-nested-scope-truncated-dep.tsx
index 4d9d7e78fb309..ecd5598cb0913 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/aliased-nested-scope-truncated-dep.tsx
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/aliased-nested-scope-truncated-dep.tsx
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 import {
   Stringify,
   mutate,
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/array-map-named-callback-cross-context.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/array-map-named-callback-cross-context.expect.md
index c1a6dfb3eae11..7bc2c193cf7cc 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/array-map-named-callback-cross-context.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/array-map-named-callback-cross-context.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 import {Stringify} from 'shared-runtime';
 
 /**
@@ -43,7 +44,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime";
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 import { Stringify } from "shared-runtime";
 
 /**
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/array-map-named-callback-cross-context.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/array-map-named-callback-cross-context.js
index e9056562262e8..faa34747da188 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/array-map-named-callback-cross-context.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/array-map-named-callback-cross-context.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 import {Stringify} from 'shared-runtime';
 
 /**
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-2-iife.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-2-iife.expect.md
index 2afc5fd25dbac..d1434e95b827a 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-2-iife.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-2-iife.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 function bar(a) {
   let x = [a];
   let y = {};
@@ -23,19 +24,27 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime";
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 function bar(a) {
-  const $ = _c(2);
-  let y;
+  const $ = _c(4);
+  let t0;
   if ($[0] !== a) {
-    const x = [a];
+    t0 = [a];
+    $[0] = a;
+    $[1] = t0;
+  } else {
+    t0 = $[1];
+  }
+  const x = t0;
+  let y;
+  if ($[2] !== x[0][1]) {
     y = {};
 
     y = x[0][1];
-    $[0] = a;
-    $[1] = y;
+    $[2] = x[0][1];
+    $[3] = y;
   } else {
-    y = $[1];
+    y = $[3];
   }
   return y;
 }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-2-iife.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-2-iife.js
index 4c224e28415b1..a77287910a419 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-2-iife.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-2-iife.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 function bar(a) {
   let x = [a];
   let y = {};
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-3-iife.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-3-iife.expect.md
index f0267c3309f5b..80bb009ba25d3 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-3-iife.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-3-iife.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 function bar(a, b) {
   let x = [a, b];
   let y = {};
@@ -27,22 +28,31 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime";
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 function bar(a, b) {
-  const $ = _c(3);
-  let y;
+  const $ = _c(6);
+  let t0;
   if ($[0] !== a || $[1] !== b) {
-    const x = [a, b];
+    t0 = [a, b];
+    $[0] = a;
+    $[1] = b;
+    $[2] = t0;
+  } else {
+    t0 = $[2];
+  }
+  const x = t0;
+  let y;
+  if ($[3] !== x[0][1] || $[4] !== x[1][0]) {
     y = {};
     let t = {};
 
     y = x[0][1];
     t = x[1][0];
-    $[0] = a;
-    $[1] = b;
-    $[2] = y;
+    $[3] = x[0][1];
+    $[4] = x[1][0];
+    $[5] = y;
   } else {
-    y = $[2];
+    y = $[5];
   }
   return y;
 }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-3-iife.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-3-iife.js
index 1afc28a9922ec..9afe5994b210b 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-3-iife.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-3-iife.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 function bar(a, b) {
   let x = [a, b];
   let y = {};
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-4-iife.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-4-iife.expect.md
index 22728aaf4323d..663d1f3d567b3 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-4-iife.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-4-iife.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 function bar(a) {
   let x = [a];
   let y = {};
@@ -23,19 +24,27 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime";
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 function bar(a) {
-  const $ = _c(2);
-  let y;
+  const $ = _c(4);
+  let t0;
   if ($[0] !== a) {
-    const x = [a];
+    t0 = [a];
+    $[0] = a;
+    $[1] = t0;
+  } else {
+    t0 = $[1];
+  }
+  const x = t0;
+  let y;
+  if ($[2] !== x[0].a[1]) {
     y = {};
 
     y = x[0].a[1];
-    $[0] = a;
-    $[1] = y;
+    $[2] = x[0].a[1];
+    $[3] = y;
   } else {
-    y = $[1];
+    y = $[3];
   }
   return y;
 }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-4-iife.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-4-iife.js
index ca479a7458926..5a3cb878485d4 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-4-iife.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-4-iife.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 function bar(a) {
   let x = [a];
   let y = {};
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-iife.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-iife.expect.md
index 60f829cdc4d66..58694faf57d33 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-iife.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-iife.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 function bar(a) {
   let x = [a];
   let y = {};
@@ -22,19 +23,27 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime";
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 function bar(a) {
-  const $ = _c(2);
-  let y;
+  const $ = _c(4);
+  let t0;
   if ($[0] !== a) {
-    const x = [a];
+    t0 = [a];
+    $[0] = a;
+    $[1] = t0;
+  } else {
+    t0 = $[1];
+  }
+  const x = t0;
+  let y;
+  if ($[2] !== x[0]) {
     y = {};
 
     y = x[0];
-    $[0] = a;
-    $[1] = y;
+    $[2] = x[0];
+    $[3] = y;
   } else {
-    y = $[1];
+    y = $[3];
   }
   return y;
 }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-iife.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-iife.js
index 9a0c7c19aa700..0b95fc02a2b58 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-iife.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/capturing-function-alias-computed-load-iife.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 function bar(a) {
   let x = [a];
   let y = {};
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-impure-functions-in-render.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-impure-functions-in-render.expect.md
index a67d467df8cfd..73dd12670f159 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-impure-functions-in-render.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-impure-functions-in-render.expect.md
@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validateNoImpureFunctionsInRender
+// @validateNoImpureFunctionsInRender @enableNewMutationAliasingModel
 
 function Component() {
   const date = Date.now();
@@ -20,7 +20,7 @@ function Component() {
   2 |
   3 | function Component() {
 > 4 |   const date = Date.now();
-    |                ^^^^^^^^ InvalidReact: Calling an impure function can produce unstable results. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#components-and-hooks-must-be-idempotent). `Date.now` is an impure function whose results may change on every call (4:4)
+    |                ^^^^^^^^^^ InvalidReact: Calling an impure function can produce unstable results. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#components-and-hooks-must-be-idempotent). `Date.now` is an impure function whose results may change on every call (4:4)
 
 InvalidReact: Calling an impure function can produce unstable results. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#components-and-hooks-must-be-idempotent). `performance.now` is an impure function whose results may change on every call (5:5)
 
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-impure-functions-in-render.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-impure-functions-in-render.js
index 6faf98caff702..83cf3e04f2b6a 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-impure-functions-in-render.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-impure-functions-in-render.js
@@ -1,4 +1,4 @@
-// @validateNoImpureFunctionsInRender
+// @validateNoImpureFunctionsInRender @enableNewMutationAliasingModel
 
 function Component() {
   const date = Date.now();
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-reassign-local-variable-in-jsx-callback.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-reassign-local-variable-in-jsx-callback.expect.md
index fe684586cbd33..0461bb4b7b4a4 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-reassign-local-variable-in-jsx-callback.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-reassign-local-variable-in-jsx-callback.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 function Component() {
   let local;
 
@@ -41,13 +42,13 @@ function Component() {
 ## Error
 
 ```
-  3 |
-  4 |   const reassignLocal = newValue => {
-> 5 |     local = newValue;
-    |     ^^^^^ InvalidReact: Reassigning a variable after render has completed can cause inconsistent behavior on subsequent renders. Consider using state instead. Variable `local` cannot be reassigned after render (5:5)
-  6 |   };
-  7 |
-  8 |   const onClick = newValue => {
+  4 |
+  5 |   const reassignLocal = newValue => {
+> 6 |     local = newValue;
+    |     ^^^^^ InvalidReact: Reassigning a variable after render has completed can cause inconsistent behavior on subsequent renders. Consider using state instead. Variable `local` cannot be reassigned after render (6:6)
+  7 |   };
+  8 |
+  9 |   const onClick = newValue => {
 ```
           
       
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-reassign-local-variable-in-jsx-callback.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-reassign-local-variable-in-jsx-callback.js
index 121495ac1e05c..2cfb336bcf5e3 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-reassign-local-variable-in-jsx-callback.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-reassign-local-variable-in-jsx-callback.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 function Component() {
   let local;
 
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.mutate-hook-argument.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.mutate-hook-argument.expect.md
index 665fc7053b788..a26381d1d301c 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.mutate-hook-argument.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.mutate-hook-argument.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 function useHook(a, b) {
   b.test = 1;
   a.test = 2;
@@ -13,12 +14,15 @@ function useHook(a, b) {
 ## Error
 
 ```
-  1 | function useHook(a, b) {
-> 2 |   b.test = 1;
-    |   ^ InvalidReact: Mutating component props or hook arguments is not allowed. Consider using a local variable instead (2:2)
-  3 |   a.test = 2;
-  4 | }
-  5 |
+  1 | // @enableNewMutationAliasingModel
+  2 | function useHook(a, b) {
+> 3 |   b.test = 1;
+    |   ^ InvalidReact: Mutating component props or hook arguments is not allowed. Consider using a local variable instead (3:3)
+
+InvalidReact: Mutating component props or hook arguments is not allowed. Consider using a local variable instead (4:4)
+  4 |   a.test = 2;
+  5 | }
+  6 |
 ```
           
       
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.mutate-hook-argument.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.mutate-hook-argument.js
index 321e9049cddbd..41c5b99132460 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.mutate-hook-argument.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.mutate-hook-argument.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 function useHook(a, b) {
   b.test = 1;
   a.test = 2;
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.not-useEffect-external-mutate.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.not-useEffect-external-mutate.expect.md
index 7d829fe9b013f..6f7d6b24831a8 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.not-useEffect-external-mutate.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.not-useEffect-external-mutate.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 let x = {a: 42};
 
 function Component(props) {
@@ -17,13 +18,15 @@ function Component(props) {
 ## Error
 
 ```
-  3 | function Component(props) {
-  4 |   foo(() => {
-> 5 |     x.a = 10;
-    |     ^ InvalidReact: Writing to a variable defined outside a component or hook is not allowed. Consider using an effect (5:5)
-  6 |     x.a = 20;
-  7 |   });
-  8 | }
+  4 | function Component(props) {
+  5 |   foo(() => {
+> 6 |     x.a = 10;
+    |     ^ InvalidReact: Writing to a variable defined outside a component or hook is not allowed. Consider using an effect (6:6)
+
+InvalidReact: Writing to a variable defined outside a component or hook is not allowed. Consider using an effect (7:7)
+  7 |     x.a = 20;
+  8 |   });
+  9 | }
 ```
           
       
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.not-useEffect-external-mutate.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.not-useEffect-external-mutate.js
index 3b44c4c247760..ed51080726b5a 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.not-useEffect-external-mutate.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.not-useEffect-external-mutate.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 let x = {a: 42};
 
 function Component(props) {
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global-indirect.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global-indirect.expect.md
index e4073947f7e15..b6f01488fc755 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global-indirect.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global-indirect.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 function Component() {
   const foo = () => {
     // Cannot assign to globals
@@ -17,13 +18,15 @@ function Component() {
 ## Error
 
 ```
-  2 |   const foo = () => {
-  3 |     // Cannot assign to globals
-> 4 |     someUnknownGlobal = true;
-    |     ^^^^^^^^^^^^^^^^^ InvalidReact: Unexpected reassignment of a variable which was defined outside of the component. Components and hooks should be pure and side-effect free, but variable reassignment is a form of side-effect. If this variable is used in rendering, use useState instead. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#side-effects-must-run-outside-of-render) (4:4)
-  5 |     moduleLocal = true;
-  6 |   };
-  7 |   foo();
+  3 |   const foo = () => {
+  4 |     // Cannot assign to globals
+> 5 |     someUnknownGlobal = true;
+    |     ^^^^^^^^^^^^^^^^^ InvalidReact: Unexpected reassignment of a variable which was defined outside of the component. Components and hooks should be pure and side-effect free, but variable reassignment is a form of side-effect. If this variable is used in rendering, use useState instead. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#side-effects-must-run-outside-of-render) (5:5)
+
+InvalidReact: Unexpected reassignment of a variable which was defined outside of the component. Components and hooks should be pure and side-effect free, but variable reassignment is a form of side-effect. If this variable is used in rendering, use useState instead. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#side-effects-must-run-outside-of-render) (6:6)
+  6 |     moduleLocal = true;
+  7 |   };
+  8 |   foo();
 ```
           
       
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global-indirect.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global-indirect.js
index 708fe643d57df..6d6681e60ad34 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global-indirect.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global-indirect.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 function Component() {
   const foo = () => {
     // Cannot assign to globals
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global.expect.md
index 4619cd27cb24d..a75aa397eceec 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 function Component() {
   // Cannot assign to globals
   someUnknownGlobal = true;
@@ -14,13 +15,15 @@ function Component() {
 ## Error
 
 ```
-  1 | function Component() {
-  2 |   // Cannot assign to globals
-> 3 |   someUnknownGlobal = true;
-    |   ^^^^^^^^^^^^^^^^^ InvalidReact: Unexpected reassignment of a variable which was defined outside of the component. Components and hooks should be pure and side-effect free, but variable reassignment is a form of side-effect. If this variable is used in rendering, use useState instead. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#side-effects-must-run-outside-of-render) (3:3)
-  4 |   moduleLocal = true;
-  5 | }
-  6 |
+  2 | function Component() {
+  3 |   // Cannot assign to globals
+> 4 |   someUnknownGlobal = true;
+    |   ^^^^^^^^^^^^^^^^^ InvalidReact: Unexpected reassignment of a variable which was defined outside of the component. Components and hooks should be pure and side-effect free, but variable reassignment is a form of side-effect. If this variable is used in rendering, use useState instead. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#side-effects-must-run-outside-of-render) (4:4)
+
+InvalidReact: Unexpected reassignment of a variable which was defined outside of the component. Components and hooks should be pure and side-effect free, but variable reassignment is a form of side-effect. If this variable is used in rendering, use useState instead. (https://react.dev/reference/rules/components-and-hooks-must-be-pure#side-effects-must-run-outside-of-render) (5:5)
+  5 |   moduleLocal = true;
+  6 | }
+  7 |
 ```
           
       
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global.js
index d0509a3d52a16..41b706866bf7c 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.reassignment-to-global.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 function Component() {
   // Cannot assign to globals
   someUnknownGlobal = true;
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.todo-repro-named-function-with-shadowed-local-same-name.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.todo-repro-named-function-with-shadowed-local-same-name.expect.md
index 2a935256d7a0d..3d9d0b5613857 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.todo-repro-named-function-with-shadowed-local-same-name.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.todo-repro-named-function-with-shadowed-local-same-name.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 function Component(props) {
   function hasErrors() {
     let hasErrors = false;
@@ -19,12 +20,12 @@ function Component(props) {
 ## Error
 
 ```
-   7 |     return hasErrors;
-   8 |   }
->  9 |   return hasErrors();
-     |          ^^^^^^^^^ Invariant: [hoisting] Expected value for identifier to be initialized. hasErrors_0$15 (9:9)
-  10 | }
-  11 |
+   8 |     return hasErrors;
+   9 |   }
+> 10 |   return hasErrors();
+     |          ^^^^^^^^^ Invariant: [InferMutationAliasingEffects] Expected value kind to be initialized. <unknown> hasErrors_0$15:TFunction (10:10)
+  11 | }
+  12 |
 ```
           
       
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.todo-repro-named-function-with-shadowed-local-same-name.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.todo-repro-named-function-with-shadowed-local-same-name.js
index b7a450ccba028..b58c0aea7daf7 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.todo-repro-named-function-with-shadowed-local-same-name.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.todo-repro-named-function-with-shadowed-local-same-name.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 function Component(props) {
   function hasErrors() {
     let hasErrors = false;
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-optional-chain.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-optional-chain.expect.md
index e4560848dd5f2..8dec2e3ebe94b 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-optional-chain.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-optional-chain.expect.md
@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 import {useEffect} from 'react';
 import {print} from 'shared-runtime';
 
@@ -25,7 +25,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 import { useEffect } from "react";
 import { print } from "shared-runtime";
 
@@ -48,9 +48,9 @@ export const FIXTURE_ENTRYPOINT = {
 ## Logs
 
 ```
-{"kind":"CompileError","fnLoc":{"start":{"line":5,"column":0,"index":139},"end":{"line":12,"column":1,"index":384},"filename":"mutate-after-useeffect-optional-chain.ts"},"detail":{"reason":"This mutates a variable that React considers immutable","description":null,"loc":{"start":{"line":10,"column":2,"index":345},"end":{"line":10,"column":5,"index":348},"filename":"mutate-after-useeffect-optional-chain.ts","identifierName":"arr"},"suggestions":null,"severity":"InvalidReact"}}
-{"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":9,"column":2,"index":304},"end":{"line":9,"column":39,"index":341},"filename":"mutate-after-useeffect-optional-chain.ts"},"decorations":[{"start":{"line":9,"column":24,"index":326},"end":{"line":9,"column":27,"index":329},"filename":"mutate-after-useeffect-optional-chain.ts","identifierName":"arr"}]}
-{"kind":"CompileSuccess","fnLoc":{"start":{"line":5,"column":0,"index":139},"end":{"line":12,"column":1,"index":384},"filename":"mutate-after-useeffect-optional-chain.ts"},"fnName":"Component","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
+{"kind":"CompileError","fnLoc":{"start":{"line":5,"column":0,"index":171},"end":{"line":12,"column":1,"index":416},"filename":"mutate-after-useeffect-optional-chain.ts"},"detail":{"reason":"Updating a value used previously in an effect function or as an effect dependency is not allowed. Consider moving the mutation before calling useEffect()","description":null,"severity":"InvalidReact","suggestions":null,"loc":{"start":{"line":10,"column":2,"index":377},"end":{"line":10,"column":5,"index":380},"filename":"mutate-after-useeffect-optional-chain.ts","identifierName":"arr"}}}
+{"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":9,"column":2,"index":336},"end":{"line":9,"column":39,"index":373},"filename":"mutate-after-useeffect-optional-chain.ts"},"decorations":[{"start":{"line":9,"column":24,"index":358},"end":{"line":9,"column":27,"index":361},"filename":"mutate-after-useeffect-optional-chain.ts","identifierName":"arr"}]}
+{"kind":"CompileSuccess","fnLoc":{"start":{"line":5,"column":0,"index":171},"end":{"line":12,"column":1,"index":416},"filename":"mutate-after-useeffect-optional-chain.ts"},"fnName":"Component","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
 ```
       
 ### Eval output
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-optional-chain.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-optional-chain.js
index c435b72d1a9ef..dd8d6669885d2 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-optional-chain.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-optional-chain.js
@@ -1,4 +1,4 @@
-// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 import {useEffect} from 'react';
 import {print} from 'shared-runtime';
 
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-ref-access.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-ref-access.expect.md
index 5e6f19dd83e65..167c23c3476b5 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-ref-access.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-ref-access.expect.md
@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 
 import {useEffect, useRef} from 'react';
 import {print} from 'shared-runtime';
@@ -24,7 +24,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 
 import { useEffect, useRef } from "react";
 import { print } from "shared-runtime";
@@ -47,9 +47,9 @@ export const FIXTURE_ENTRYPOINT = {
 ## Logs
 
 ```
-{"kind":"CompileError","fnLoc":{"start":{"line":6,"column":0,"index":148},"end":{"line":11,"column":1,"index":311},"filename":"mutate-after-useeffect-ref-access.ts"},"detail":{"reason":"Mutating component props or hook arguments is not allowed. Consider using a local variable instead","description":null,"loc":{"start":{"line":9,"column":2,"index":269},"end":{"line":9,"column":16,"index":283},"filename":"mutate-after-useeffect-ref-access.ts"},"suggestions":null,"severity":"InvalidReact"}}
-{"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":8,"column":2,"index":227},"end":{"line":8,"column":40,"index":265},"filename":"mutate-after-useeffect-ref-access.ts"},"decorations":[{"start":{"line":8,"column":24,"index":249},"end":{"line":8,"column":30,"index":255},"filename":"mutate-after-useeffect-ref-access.ts","identifierName":"arrRef"}]}
-{"kind":"CompileSuccess","fnLoc":{"start":{"line":6,"column":0,"index":148},"end":{"line":11,"column":1,"index":311},"filename":"mutate-after-useeffect-ref-access.ts"},"fnName":"Component","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
+{"kind":"CompileError","fnLoc":{"start":{"line":6,"column":0,"index":180},"end":{"line":11,"column":1,"index":343},"filename":"mutate-after-useeffect-ref-access.ts"},"detail":{"reason":"Mutating component props or hook arguments is not allowed. Consider using a local variable instead","description":null,"severity":"InvalidReact","suggestions":null,"loc":{"start":{"line":9,"column":2,"index":301},"end":{"line":9,"column":16,"index":315},"filename":"mutate-after-useeffect-ref-access.ts"}}}
+{"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":8,"column":2,"index":259},"end":{"line":8,"column":40,"index":297},"filename":"mutate-after-useeffect-ref-access.ts"},"decorations":[{"start":{"line":8,"column":24,"index":281},"end":{"line":8,"column":30,"index":287},"filename":"mutate-after-useeffect-ref-access.ts","identifierName":"arrRef"}]}
+{"kind":"CompileSuccess","fnLoc":{"start":{"line":6,"column":0,"index":180},"end":{"line":11,"column":1,"index":343},"filename":"mutate-after-useeffect-ref-access.ts"},"fnName":"Component","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
 ```
       
 ### Eval output
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-ref-access.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-ref-access.js
index bd3f6d1de54bd..f91bd14deb14c 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-ref-access.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect-ref-access.js
@@ -1,4 +1,4 @@
-// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 
 import {useEffect, useRef} from 'react';
 import {print} from 'shared-runtime';
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect.expect.md
index 3b61fbf834246..47a0124baa856 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect.expect.md
@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 import {useEffect} from 'react';
 
 function Component({foo}) {
@@ -24,7 +24,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 import { useEffect } from "react";
 
 function Component(t0) {
@@ -47,9 +47,9 @@ export const FIXTURE_ENTRYPOINT = {
 ## Logs
 
 ```
-{"kind":"CompileError","fnLoc":{"start":{"line":4,"column":0,"index":101},"end":{"line":11,"column":1,"index":222},"filename":"mutate-after-useeffect.ts"},"detail":{"reason":"This mutates a variable that React considers immutable","description":null,"loc":{"start":{"line":9,"column":2,"index":194},"end":{"line":9,"column":5,"index":197},"filename":"mutate-after-useeffect.ts","identifierName":"arr"},"suggestions":null,"severity":"InvalidReact"}}
-{"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":6,"column":2,"index":149},"end":{"line":8,"column":4,"index":190},"filename":"mutate-after-useeffect.ts"},"decorations":[{"start":{"line":7,"column":4,"index":171},"end":{"line":7,"column":7,"index":174},"filename":"mutate-after-useeffect.ts","identifierName":"arr"},{"start":{"line":7,"column":4,"index":171},"end":{"line":7,"column":7,"index":174},"filename":"mutate-after-useeffect.ts","identifierName":"arr"},{"start":{"line":7,"column":13,"index":180},"end":{"line":7,"column":16,"index":183},"filename":"mutate-after-useeffect.ts","identifierName":"foo"}]}
-{"kind":"CompileSuccess","fnLoc":{"start":{"line":4,"column":0,"index":101},"end":{"line":11,"column":1,"index":222},"filename":"mutate-after-useeffect.ts"},"fnName":"Component","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
+{"kind":"CompileError","fnLoc":{"start":{"line":4,"column":0,"index":133},"end":{"line":11,"column":1,"index":254},"filename":"mutate-after-useeffect.ts"},"detail":{"reason":"Updating a value used previously in an effect function or as an effect dependency is not allowed. Consider moving the mutation before calling useEffect()","description":null,"severity":"InvalidReact","suggestions":null,"loc":{"start":{"line":9,"column":2,"index":226},"end":{"line":9,"column":5,"index":229},"filename":"mutate-after-useeffect.ts","identifierName":"arr"}}}
+{"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":6,"column":2,"index":181},"end":{"line":8,"column":4,"index":222},"filename":"mutate-after-useeffect.ts"},"decorations":[{"start":{"line":7,"column":4,"index":203},"end":{"line":7,"column":7,"index":206},"filename":"mutate-after-useeffect.ts","identifierName":"arr"},{"start":{"line":7,"column":4,"index":203},"end":{"line":7,"column":7,"index":206},"filename":"mutate-after-useeffect.ts","identifierName":"arr"},{"start":{"line":7,"column":13,"index":212},"end":{"line":7,"column":16,"index":215},"filename":"mutate-after-useeffect.ts","identifierName":"foo"}]}
+{"kind":"CompileSuccess","fnLoc":{"start":{"line":4,"column":0,"index":133},"end":{"line":11,"column":1,"index":254},"filename":"mutate-after-useeffect.ts"},"fnName":"Component","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
 ```
       
 ### Eval output
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect.js
index fbcbf004a308c..6f237c89b4d4f 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-after-useeffect.js
@@ -1,4 +1,4 @@
-// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 import {useEffect} from 'react';
 
 function Component({foo}) {
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-key-object-mutated-later.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-key-object-mutated-later.expect.md
index bf0f9da6b1da1..5c73ce6d77adf 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-key-object-mutated-later.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-key-object-mutated-later.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 import {identity, mutate} from 'shared-runtime';
 
 function Component(props) {
@@ -23,38 +24,22 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime";
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 import { identity, mutate } from "shared-runtime";
 
 function Component(props) {
-  const $ = _c(5);
-  let t0;
-  if ($[0] === Symbol.for("react.memo_cache_sentinel")) {
-    t0 = {};
-    $[0] = t0;
+  const $ = _c(2);
+  let context;
+  if ($[0] !== props.value) {
+    const key = {};
+    context = { [key]: identity([props.value]) };
+
+    mutate(key);
+    $[0] = props.value;
+    $[1] = context;
   } else {
-    t0 = $[0];
+    context = $[1];
   }
-  const key = t0;
-  let t1;
-  if ($[1] !== props.value) {
-    t1 = identity([props.value]);
-    $[1] = props.value;
-    $[2] = t1;
-  } else {
-    t1 = $[2];
-  }
-  let t2;
-  if ($[3] !== t1) {
-    t2 = { [key]: t1 };
-    $[3] = t1;
-    $[4] = t2;
-  } else {
-    t2 = $[4];
-  }
-  const context = t2;
-
-  mutate(key);
   return context;
 }
 
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-key-object-mutated-later.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-key-object-mutated-later.js
index 1edaaaef27e4b..923733b9c238d 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-key-object-mutated-later.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-key-object-mutated-later.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 import {identity, mutate} from 'shared-runtime';
 
 function Component(props) {
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-member.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-member.expect.md
index 810b03e529e77..1ef3ed157f9fa 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-member.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-member.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 import {identity, mutate, mutateAndReturn} from 'shared-runtime';
 
 function Component(props) {
@@ -23,15 +24,26 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime";
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 import { identity, mutate, mutateAndReturn } from "shared-runtime";
 
 function Component(props) {
-  const $ = _c(2);
+  const $ = _c(4);
   let context;
   if ($[0] !== props.value) {
     const key = { a: "key" };
-    context = { [key.a]: identity([props.value]) };
+
+    const t0 = key.a;
+    const t1 = identity([props.value]);
+    let t2;
+    if ($[2] !== t1) {
+      t2 = { [t0]: t1 };
+      $[2] = t1;
+      $[3] = t2;
+    } else {
+      t2 = $[3];
+    }
+    context = t2;
 
     mutate(key);
     $[0] = props.value;
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-member.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-member.js
index 95a1d434624e9..516fdc1dbcf41 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-member.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/object-expression-computed-member.js
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 import {identity, mutate, mutateAndReturn} from 'shared-runtime';
 
 function Component(props) {
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/reactive-setState.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/reactive-setState.expect.md
index 3af2b9b8b1c89..de7fc2903ebd2 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/reactive-setState.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/reactive-setState.expect.md
@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @inferEffectDependencies
+// @inferEffectDependencies @enableNewMutationAliasingModel
 import {useEffect, useState} from 'react';
 import {print} from 'shared-runtime';
 
@@ -26,7 +26,7 @@ function ReactiveRefInEffect(props) {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @inferEffectDependencies
+import { c as _c } from "react/compiler-runtime"; // @inferEffectDependencies @enableNewMutationAliasingModel
 import { useEffect, useState } from "react";
 import { print } from "shared-runtime";
 
@@ -34,22 +34,28 @@ import { print } from "shared-runtime";
  * setState types are not enough to determine to omit from deps. Must also take reactivity into account.
  */
 function ReactiveRefInEffect(props) {
-  const $ = _c(2);
+  const $ = _c(4);
   const [, setState1] = useRef("initial value");
   const [, setState2] = useRef("initial value");
   let setState;
-  if (props.foo) {
-    setState = setState1;
+  if ($[0] !== props.foo) {
+    if (props.foo) {
+      setState = setState1;
+    } else {
+      setState = setState2;
+    }
+    $[0] = props.foo;
+    $[1] = setState;
   } else {
-    setState = setState2;
+    setState = $[1];
   }
   let t0;
-  if ($[0] !== setState) {
+  if ($[2] !== setState) {
     t0 = () => print(setState);
-    $[0] = setState;
-    $[1] = t0;
+    $[2] = setState;
+    $[3] = t0;
   } else {
-    t0 = $[1];
+    t0 = $[3];
   }
   useEffect(t0, [setState]);
 }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/reactive-setState.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/reactive-setState.js
index 46a83d8ad42dd..158881eb0204d 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/reactive-setState.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/reactive-setState.js
@@ -1,4 +1,4 @@
-// @inferEffectDependencies
+// @inferEffectDependencies @enableNewMutationAliasingModel
 import {useEffect, useState} from 'react';
 import {print} from 'shared-runtime';
 
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/repro-internal-compiler-shared-mutablerange-bug.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/repro-internal-compiler-shared-mutablerange-bug.expect.md
new file mode 100644
index 0000000000000..9a0c82a3ccca0
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/repro-internal-compiler-shared-mutablerange-bug.expect.md
@@ -0,0 +1,80 @@
+
+## Input
+
+```javascript
+//@flow @validatePreserveExistingMemoizationGuarantees @enableNewMutationAliasingModel
+component Component(
+  onAsyncSubmit?: (() => void) => void,
+  onClose: (isConfirmed: boolean) => void
+) {
+  // When running inferReactiveScopeVariables,
+  // onAsyncSubmit and onClose update to share
+  // a mutableRange instance.
+  const onSubmit = useCallback(() => {
+    if (onAsyncSubmit) {
+      onAsyncSubmit(() => {
+        onClose(true);
+      });
+      return;
+    }
+  }, [onAsyncSubmit, onClose]);
+  // When running inferReactiveScopeVariables here,
+  // first the existing range gets updated (affecting
+  // onAsyncSubmit) and then onClose gets assigned a
+  // different mutable range instance, which is the
+  // one reset after AnalyzeFunctions.
+  // The fix is to fully reset mutable ranges *instances*
+  // after AnalyzeFunctions visit a function expression
+  return <Dialog onSubmit={onSubmit} onClose={() => onClose(false)} />;
+}
+
+```
+
+## Code
+
+```javascript
+import { c as _c } from "react/compiler-runtime";
+function Component(t0) {
+  const $ = _c(8);
+  const { onAsyncSubmit, onClose } = t0;
+  let t1;
+  if ($[0] !== onAsyncSubmit || $[1] !== onClose) {
+    t1 = () => {
+      if (onAsyncSubmit) {
+        onAsyncSubmit(() => {
+          onClose(true);
+        });
+        return;
+      }
+    };
+    $[0] = onAsyncSubmit;
+    $[1] = onClose;
+    $[2] = t1;
+  } else {
+    t1 = $[2];
+  }
+  const onSubmit = t1;
+  let t2;
+  if ($[3] !== onClose) {
+    t2 = () => onClose(false);
+    $[3] = onClose;
+    $[4] = t2;
+  } else {
+    t2 = $[4];
+  }
+  let t3;
+  if ($[5] !== onSubmit || $[6] !== t2) {
+    t3 = <Dialog onSubmit={onSubmit} onClose={t2} />;
+    $[5] = onSubmit;
+    $[6] = t2;
+    $[7] = t3;
+  } else {
+    t3 = $[7];
+  }
+  return t3;
+}
+
+```
+      
+### Eval output
+(kind: exception) Fixture not implemented
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/repro-internal-compiler-shared-mutablerange-bug.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/repro-internal-compiler-shared-mutablerange-bug.js
new file mode 100644
index 0000000000000..20cad06e97e2e
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/repro-internal-compiler-shared-mutablerange-bug.js
@@ -0,0 +1,25 @@
+//@flow @validatePreserveExistingMemoizationGuarantees @enableNewMutationAliasingModel
+component Component(
+  onAsyncSubmit?: (() => void) => void,
+  onClose: (isConfirmed: boolean) => void
+) {
+  // When running inferReactiveScopeVariables,
+  // onAsyncSubmit and onClose update to share
+  // a mutableRange instance.
+  const onSubmit = useCallback(() => {
+    if (onAsyncSubmit) {
+      onAsyncSubmit(() => {
+        onClose(true);
+      });
+      return;
+    }
+  }, [onAsyncSubmit, onClose]);
+  // When running inferReactiveScopeVariables here,
+  // first the existing range gets updated (affecting
+  // onAsyncSubmit) and then onClose gets assigned a
+  // different mutable range instance, which is the
+  // one reset after AnalyzeFunctions.
+  // The fix is to fully reset mutable ranges *instances*
+  // after AnalyzeFunctions visit a function expression
+  return <Dialog onSubmit={onSubmit} onClose={() => onClose(false)} />;
+}
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/retry-no-emit.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/retry-no-emit.expect.md
index bd70c0138d7e2..053728ed17015 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/retry-no-emit.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/retry-no-emit.expect.md
@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @inferEffectDependencies @noEmit @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @noEmit @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 import {print} from 'shared-runtime';
 import useEffectWrapper from 'useEffectWrapper';
 
@@ -27,7 +27,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-// @inferEffectDependencies @noEmit @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @noEmit @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 import { print } from "shared-runtime";
 import useEffectWrapper from "useEffectWrapper";
 
@@ -52,10 +52,10 @@ export const FIXTURE_ENTRYPOINT = {
 ## Logs
 
 ```
-{"kind":"CompileError","fnLoc":{"start":{"line":5,"column":0,"index":163},"end":{"line":13,"column":1,"index":357},"filename":"retry-no-emit.ts"},"detail":{"reason":"This mutates a variable that React considers immutable","description":null,"loc":{"start":{"line":11,"column":2,"index":320},"end":{"line":11,"column":6,"index":324},"filename":"retry-no-emit.ts","identifierName":"arr2"},"suggestions":null,"severity":"InvalidReact"}}
-{"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":7,"column":2,"index":216},"end":{"line":7,"column":36,"index":250},"filename":"retry-no-emit.ts"},"decorations":[{"start":{"line":7,"column":31,"index":245},"end":{"line":7,"column":34,"index":248},"filename":"retry-no-emit.ts","identifierName":"arr"}]}
-{"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":10,"column":2,"index":274},"end":{"line":10,"column":44,"index":316},"filename":"retry-no-emit.ts"},"decorations":[{"start":{"line":10,"column":25,"index":297},"end":{"line":10,"column":29,"index":301},"filename":"retry-no-emit.ts","identifierName":"arr2"},{"start":{"line":10,"column":25,"index":297},"end":{"line":10,"column":29,"index":301},"filename":"retry-no-emit.ts","identifierName":"arr2"},{"start":{"line":10,"column":35,"index":307},"end":{"line":10,"column":42,"index":314},"filename":"retry-no-emit.ts","identifierName":"propVal"}]}
-{"kind":"CompileSuccess","fnLoc":{"start":{"line":5,"column":0,"index":163},"end":{"line":13,"column":1,"index":357},"filename":"retry-no-emit.ts"},"fnName":"Foo","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
+{"kind":"CompileError","fnLoc":{"start":{"line":5,"column":0,"index":195},"end":{"line":13,"column":1,"index":389},"filename":"retry-no-emit.ts"},"detail":{"reason":"This mutates a variable that React considers immutable","description":null,"severity":"InvalidReact","suggestions":null,"loc":{"start":{"line":11,"column":2,"index":352},"end":{"line":11,"column":6,"index":356},"filename":"retry-no-emit.ts","identifierName":"arr2"}}}
+{"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":7,"column":2,"index":248},"end":{"line":7,"column":36,"index":282},"filename":"retry-no-emit.ts"},"decorations":[{"start":{"line":7,"column":31,"index":277},"end":{"line":7,"column":34,"index":280},"filename":"retry-no-emit.ts","identifierName":"arr"}]}
+{"kind":"AutoDepsDecorations","fnLoc":{"start":{"line":10,"column":2,"index":306},"end":{"line":10,"column":44,"index":348},"filename":"retry-no-emit.ts"},"decorations":[{"start":{"line":10,"column":25,"index":329},"end":{"line":10,"column":29,"index":333},"filename":"retry-no-emit.ts","identifierName":"arr2"},{"start":{"line":10,"column":25,"index":329},"end":{"line":10,"column":29,"index":333},"filename":"retry-no-emit.ts","identifierName":"arr2"},{"start":{"line":10,"column":35,"index":339},"end":{"line":10,"column":42,"index":346},"filename":"retry-no-emit.ts","identifierName":"propVal"}]}
+{"kind":"CompileSuccess","fnLoc":{"start":{"line":5,"column":0,"index":195},"end":{"line":13,"column":1,"index":389},"filename":"retry-no-emit.ts"},"fnName":"Foo","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":0,"prunedMemoValues":0}
 ```
       
 ### Eval output
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/retry-no-emit.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/retry-no-emit.js
index d1dda06a044a2..c15f400d3114d 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/retry-no-emit.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/retry-no-emit.js
@@ -1,4 +1,4 @@
-// @inferEffectDependencies @noEmit @panicThreshold:"none" @loggerTestOnly
+// @inferEffectDependencies @noEmit @panicThreshold:"none" @loggerTestOnly @enableNewMutationAliasingModel
 import {print} from 'shared-runtime';
 import useEffectWrapper from 'useEffectWrapper';
 
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/shared-hook-calls.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/shared-hook-calls.expect.md
index 92dbf9843ad65..39bd61aaf34a7 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/shared-hook-calls.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/shared-hook-calls.expect.md
@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @enableFire
+// @enableFire @enableNewMutationAliasingModel
 import {fire} from 'react';
 
 function Component({bar, baz}) {
@@ -26,7 +26,7 @@ function Component({bar, baz}) {
 ## Code
 
 ```javascript
-import { c as _c, useFire } from "react/compiler-runtime"; // @enableFire
+import { c as _c, useFire } from "react/compiler-runtime"; // @enableFire @enableNewMutationAliasingModel
 import { fire } from "react";
 
 function Component(t0) {
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/shared-hook-calls.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/shared-hook-calls.js
index 5cb51e9bd3c78..54d4cf83fe310 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/shared-hook-calls.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/shared-hook-calls.js
@@ -1,4 +1,4 @@
-// @enableFire
+// @enableFire @enableNewMutationAliasingModel
 import {fire} from 'react';
 
 function Component({bar, baz}) {
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-deplist-controlflow.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-deplist-controlflow.expect.md
index 080cc0a74a609..e33f52396d5e5 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-deplist-controlflow.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-deplist-controlflow.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 
@@ -35,44 +36,51 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime";
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 import { useCallback } from "react";
 import { Stringify } from "shared-runtime";
 
 function Foo(t0) {
-  const $ = _c(8);
+  const $ = _c(10);
   const { arr1, arr2, foo } = t0;
-  let getVal1;
   let t1;
-  if ($[0] !== arr1 || $[1] !== arr2 || $[2] !== foo) {
-    const x = [arr1];
-
+  if ($[0] !== arr1) {
+    t1 = [arr1];
+    $[0] = arr1;
+    $[1] = t1;
+  } else {
+    t1 = $[1];
+  }
+  const x = t1;
+  let getVal1;
+  let t2;
+  if ($[2] !== arr2 || $[3] !== foo || $[4] !== x) {
     let y = [];
 
     getVal1 = _temp;
 
-    t1 = () => [y];
+    t2 = () => [y];
     foo ? (y = x.concat(arr2)) : y;
-    $[0] = arr1;
-    $[1] = arr2;
-    $[2] = foo;
-    $[3] = getVal1;
-    $[4] = t1;
+    $[2] = arr2;
+    $[3] = foo;
+    $[4] = x;
+    $[5] = getVal1;
+    $[6] = t2;
   } else {
-    getVal1 = $[3];
-    t1 = $[4];
+    getVal1 = $[5];
+    t2 = $[6];
   }
-  const getVal2 = t1;
-  let t2;
-  if ($[5] !== getVal1 || $[6] !== getVal2) {
-    t2 = <Stringify val1={getVal1} val2={getVal2} shouldInvokeFns={true} />;
-    $[5] = getVal1;
-    $[6] = getVal2;
-    $[7] = t2;
+  const getVal2 = t2;
+  let t3;
+  if ($[7] !== getVal1 || $[8] !== getVal2) {
+    t3 = <Stringify val1={getVal1} val2={getVal2} shouldInvokeFns={true} />;
+    $[7] = getVal1;
+    $[8] = getVal2;
+    $[9] = t3;
   } else {
-    t2 = $[7];
+    t3 = $[9];
   }
-  return t2;
+  return t3;
 }
 function _temp() {
   return { x: 2 };
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-deplist-controlflow.tsx b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-deplist-controlflow.tsx
index ba0abc0d7cdf0..08b9e4b2faa6c 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-deplist-controlflow.tsx
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-deplist-controlflow.tsx
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-depslist-assignment.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-depslist-assignment.expect.md
index 89a6ad80c3945..d37762bbac530 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-depslist-assignment.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-depslist-assignment.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 
@@ -30,37 +31,44 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime";
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 import { useCallback } from "react";
 import { Stringify } from "shared-runtime";
 
 // We currently produce invalid output (incorrect scoping for `y` declaration)
 function useFoo(arr1, arr2) {
-  const $ = _c(5);
+  const $ = _c(7);
   let t0;
-  if ($[0] !== arr1 || $[1] !== arr2) {
-    const x = [arr1];
-
-    let y;
-    t0 = () => ({ y });
-
-    (y = x.concat(arr2)), y;
+  if ($[0] !== arr1) {
+    t0 = [arr1];
     $[0] = arr1;
-    $[1] = arr2;
-    $[2] = t0;
+    $[1] = t0;
   } else {
-    t0 = $[2];
+    t0 = $[1];
   }
-  const getVal = t0;
+  const x = t0;
   let t1;
-  if ($[3] !== getVal) {
-    t1 = <Stringify getVal={getVal} shouldInvokeFns={true} />;
-    $[3] = getVal;
+  if ($[2] !== arr2 || $[3] !== x) {
+    let y;
+    t1 = () => ({ y });
+
+    (y = x.concat(arr2)), y;
+    $[2] = arr2;
+    $[3] = x;
     $[4] = t1;
   } else {
     t1 = $[4];
   }
-  return t1;
+  const getVal = t1;
+  let t2;
+  if ($[5] !== getVal) {
+    t2 = <Stringify getVal={getVal} shouldInvokeFns={true} />;
+    $[5] = getVal;
+    $[6] = t2;
+  } else {
+    t2 = $[6];
+  }
+  return t2;
 }
 
 export const FIXTURE_ENTRYPOINT = {
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-depslist-assignment.tsx b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-depslist-assignment.tsx
index 3ac3845c47f74..43e2dfbb0504a 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-depslist-assignment.tsx
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-depslist-assignment.tsx
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useMemo-reordering-depslist-assignment.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useMemo-reordering-depslist-assignment.expect.md
index 3fffec6a7dc20..26445bf9207be 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useMemo-reordering-depslist-assignment.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useMemo-reordering-depslist-assignment.expect.md
@@ -2,6 +2,7 @@
 ## Input
 
 ```javascript
+// @enableNewMutationAliasingModel
 import {useMemo} from 'react';
 
 function useFoo(arr1, arr2) {
@@ -26,33 +27,40 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime";
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 import { useMemo } from "react";
 
 function useFoo(arr1, arr2) {
-  const $ = _c(5);
+  const $ = _c(7);
+  let t0;
+  if ($[0] !== arr1) {
+    t0 = [arr1];
+    $[0] = arr1;
+    $[1] = t0;
+  } else {
+    t0 = $[1];
+  }
+  const x = t0;
   let y;
-  if ($[0] !== arr1 || $[1] !== arr2) {
-    const x = [arr1];
-
+  if ($[2] !== arr2 || $[3] !== x) {
     (y = x.concat(arr2)), y;
-    $[0] = arr1;
-    $[1] = arr2;
-    $[2] = y;
+    $[2] = arr2;
+    $[3] = x;
+    $[4] = y;
   } else {
-    y = $[2];
+    y = $[4];
   }
-  let t0;
   let t1;
-  if ($[3] !== y) {
-    t1 = { y };
-    $[3] = y;
-    $[4] = t1;
+  let t2;
+  if ($[5] !== y) {
+    t2 = { y };
+    $[5] = y;
+    $[6] = t2;
   } else {
-    t1 = $[4];
+    t2 = $[6];
   }
-  t0 = t1;
-  return t0;
+  t1 = t2;
+  return t1;
 }
 
 export const FIXTURE_ENTRYPOINT = {
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useMemo-reordering-depslist-assignment.ts b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useMemo-reordering-depslist-assignment.ts
index 8025d3680fb51..5b7d799d68b13 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useMemo-reordering-depslist-assignment.ts
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useMemo-reordering-depslist-assignment.ts
@@ -1,3 +1,4 @@
+// @enableNewMutationAliasingModel
 import {useMemo} from 'react';
 
 function useFoo(arr1, arr2) {
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-expression-computed-key-object-mutated-later.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-expression-computed-key-object-mutated-later.expect.md
index bf0f9da6b1da1..f187c8c79d369 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-expression-computed-key-object-mutated-later.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-expression-computed-key-object-mutated-later.expect.md
@@ -27,34 +27,18 @@ import { c as _c } from "react/compiler-runtime";
 import { identity, mutate } from "shared-runtime";
 
 function Component(props) {
-  const $ = _c(5);
-  let t0;
-  if ($[0] === Symbol.for("react.memo_cache_sentinel")) {
-    t0 = {};
-    $[0] = t0;
+  const $ = _c(2);
+  let context;
+  if ($[0] !== props.value) {
+    const key = {};
+    context = { [key]: identity([props.value]) };
+
+    mutate(key);
+    $[0] = props.value;
+    $[1] = context;
   } else {
-    t0 = $[0];
+    context = $[1];
   }
-  const key = t0;
-  let t1;
-  if ($[1] !== props.value) {
-    t1 = identity([props.value]);
-    $[1] = props.value;
-    $[2] = t1;
-  } else {
-    t1 = $[2];
-  }
-  let t2;
-  if ($[3] !== t1) {
-    t2 = { [key]: t1 };
-    $[3] = t1;
-    $[4] = t2;
-  } else {
-    t2 = $[4];
-  }
-  const context = t2;
-
-  mutate(key);
   return context;
 }
 
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-expression-computed-member.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-expression-computed-member.expect.md
index 810b03e529e77..01d91de8d4fb7 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-expression-computed-member.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-expression-computed-member.expect.md
@@ -27,11 +27,22 @@ import { c as _c } from "react/compiler-runtime";
 import { identity, mutate, mutateAndReturn } from "shared-runtime";
 
 function Component(props) {
-  const $ = _c(2);
+  const $ = _c(4);
   let context;
   if ($[0] !== props.value) {
     const key = { a: "key" };
-    context = { [key.a]: identity([props.value]) };
+
+    const t0 = key.a;
+    const t1 = identity([props.value]);
+    let t2;
+    if ($[2] !== t1) {
+      t2 = { [t0]: t1 };
+      $[2] = t1;
+      $[3] = t2;
+    } else {
+      t2 = $[3];
+    }
+    context = t2;
 
     mutate(key);
     $[0] = props.value;
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-deplist-controlflow.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-deplist-controlflow.expect.md
index 080cc0a74a609..18e0621d62669 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-deplist-controlflow.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-deplist-controlflow.expect.md
@@ -40,39 +40,46 @@ import { useCallback } from "react";
 import { Stringify } from "shared-runtime";
 
 function Foo(t0) {
-  const $ = _c(8);
+  const $ = _c(10);
   const { arr1, arr2, foo } = t0;
-  let getVal1;
   let t1;
-  if ($[0] !== arr1 || $[1] !== arr2 || $[2] !== foo) {
-    const x = [arr1];
-
+  if ($[0] !== arr1) {
+    t1 = [arr1];
+    $[0] = arr1;
+    $[1] = t1;
+  } else {
+    t1 = $[1];
+  }
+  const x = t1;
+  let getVal1;
+  let t2;
+  if ($[2] !== arr2 || $[3] !== foo || $[4] !== x) {
     let y = [];
 
     getVal1 = _temp;
 
-    t1 = () => [y];
+    t2 = () => [y];
     foo ? (y = x.concat(arr2)) : y;
-    $[0] = arr1;
-    $[1] = arr2;
-    $[2] = foo;
-    $[3] = getVal1;
-    $[4] = t1;
+    $[2] = arr2;
+    $[3] = foo;
+    $[4] = x;
+    $[5] = getVal1;
+    $[6] = t2;
   } else {
-    getVal1 = $[3];
-    t1 = $[4];
+    getVal1 = $[5];
+    t2 = $[6];
   }
-  const getVal2 = t1;
-  let t2;
-  if ($[5] !== getVal1 || $[6] !== getVal2) {
-    t2 = <Stringify val1={getVal1} val2={getVal2} shouldInvokeFns={true} />;
-    $[5] = getVal1;
-    $[6] = getVal2;
-    $[7] = t2;
+  const getVal2 = t2;
+  let t3;
+  if ($[7] !== getVal1 || $[8] !== getVal2) {
+    t3 = <Stringify val1={getVal1} val2={getVal2} shouldInvokeFns={true} />;
+    $[7] = getVal1;
+    $[8] = getVal2;
+    $[9] = t3;
   } else {
-    t2 = $[7];
+    t3 = $[9];
   }
-  return t2;
+  return t3;
 }
 function _temp() {
   return { x: 2 };
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-depslist-assignment.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-depslist-assignment.expect.md
index 89a6ad80c3945..f7ebdf0ca59dc 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-depslist-assignment.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-depslist-assignment.expect.md
@@ -36,31 +36,38 @@ import { Stringify } from "shared-runtime";
 
 // We currently produce invalid output (incorrect scoping for `y` declaration)
 function useFoo(arr1, arr2) {
-  const $ = _c(5);
+  const $ = _c(7);
   let t0;
-  if ($[0] !== arr1 || $[1] !== arr2) {
-    const x = [arr1];
-
-    let y;
-    t0 = () => ({ y });
-
-    (y = x.concat(arr2)), y;
+  if ($[0] !== arr1) {
+    t0 = [arr1];
     $[0] = arr1;
-    $[1] = arr2;
-    $[2] = t0;
+    $[1] = t0;
   } else {
-    t0 = $[2];
+    t0 = $[1];
   }
-  const getVal = t0;
+  const x = t0;
   let t1;
-  if ($[3] !== getVal) {
-    t1 = <Stringify getVal={getVal} shouldInvokeFns={true} />;
-    $[3] = getVal;
+  if ($[2] !== arr2 || $[3] !== x) {
+    let y;
+    t1 = () => ({ y });
+
+    (y = x.concat(arr2)), y;
+    $[2] = arr2;
+    $[3] = x;
     $[4] = t1;
   } else {
     t1 = $[4];
   }
-  return t1;
+  const getVal = t1;
+  let t2;
+  if ($[5] !== getVal) {
+    t2 = <Stringify getVal={getVal} shouldInvokeFns={true} />;
+    $[5] = getVal;
+    $[6] = t2;
+  } else {
+    t2 = $[6];
+  }
+  return t2;
 }
 
 export const FIXTURE_ENTRYPOINT = {
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useMemo-reordering-depslist-assignment.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useMemo-reordering-depslist-assignment.expect.md
index 3fffec6a7dc20..6a3197de54ea2 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useMemo-reordering-depslist-assignment.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useMemo-reordering-depslist-assignment.expect.md
@@ -30,29 +30,36 @@ import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 
 function useFoo(arr1, arr2) {
-  const $ = _c(5);
+  const $ = _c(7);
+  let t0;
+  if ($[0] !== arr1) {
+    t0 = [arr1];
+    $[0] = arr1;
+    $[1] = t0;
+  } else {
+    t0 = $[1];
+  }
+  const x = t0;
   let y;
-  if ($[0] !== arr1 || $[1] !== arr2) {
-    const x = [arr1];
-
+  if ($[2] !== arr2 || $[3] !== x) {
     (y = x.concat(arr2)), y;
-    $[0] = arr1;
-    $[1] = arr2;
-    $[2] = y;
+    $[2] = arr2;
+    $[3] = x;
+    $[4] = y;
   } else {
-    y = $[2];
+    y = $[4];
   }
-  let t0;
   let t1;
-  if ($[3] !== y) {
-    t1 = { y };
-    $[3] = y;
-    $[4] = t1;
+  let t2;
+  if ($[5] !== y) {
+    t2 = { y };
+    $[5] = y;
+    $[6] = t2;
   } else {
-    t1 = $[4];
+    t2 = $[6];
   }
-  t0 = t1;
-  return t0;
+  t1 = t2;
+  return t1;
 }
 
 export const FIXTURE_ENTRYPOINT = {