Replaced Error constructor with invariant

Author: Brian Vaughn

packages/react-reconciler/src/ReactFiberHooks.js

@@ -871,7 +871,7 @@ function useMutableSourceImpl<Source, Snapshot>(
 
   invariant(
     root !== null,
-    'Expected a work-in-progress root. This is likely a bug in React. Please file an issue.',
+    'Expected a work-in-progress root. This is a bug in React. Please file an issue.',
   );
 
   const pendingExpirationTime = getPendingExpirationTime(root, source);
@@ -932,9 +932,9 @@ function useMutableSourceImpl<Source, Snapshot>(
       // This error won't be user-visible unless we throw again during re-render,
       // but we should not do this since the retry-render will be synchronous.
       // It would be a React error if this message was ever user visible.
-      throw Error(
-        'Cannot read from mutable source during the current render without tearing. ' +
-          'This is a bug in React. Please file an issue.',
+      invariant(
+        false,
+        'Cannot read from mutable source during the current render without tearing. This is a bug in React. Please file an issue.',
       );
     }
   }

scripts/error-codes/codes.json

@@ -346,5 +346,6 @@
   "345": "Root did not complete. This is a bug in React.",
   "346": "An event responder context was used outside of an event cycle.",
   "347": "Maps are not valid as a React child (found: %s). Consider converting children to an array of keyed ReactElements instead.",
-  "348": "Expected a work-in-progress root. This is likely a bug in React. Please file an issue."
+  "348": "Expected a work-in-progress root. This is a bug in React. Please file an issue.",
+  "349": "Cannot read from mutable source during the current render without tearing. This is a bug in React. Please file an issue."
 }