Improve runtime error for non-schema values in shape

Author: colinhacks

.github/workflows/release.yml

@@ -7,6 +7,7 @@ on:
       - main
     paths:
       - "packages/zod/package.json"
+      - "packages/zod/src/**"
       - ".github/workflows/release.yml"
 
 jobs:

packages/zod/src/v4/classic/schemas.ts

@@ -1156,12 +1156,10 @@ export function object<T extends core.$ZodLooseShape = Partial<Record<never, cor
 ): ZodObject<util.Writeable<T> & {}, core.$strip> {
   const def: core.$ZodObjectDef = {
     type: "object",
-
     get shape() {
       util.assignProp(this, "shape", { ...shape });
       return this.shape;
     },
-
     ...util.normalizeParams(params),
   };
   return new ZodObject(def) as any;

packages/zod/src/v4/core/schemas.ts

@@ -1626,6 +1626,11 @@ export const $ZodObject: core.$constructor<$ZodObject> = /*@__PURE__*/ core.$con
 
   const _normalized = util.cached(() => {
     const keys = Object.keys(def.shape);
+    for (const k of keys) {
+      if (!(def.shape[k] instanceof $ZodType)) {
+        throw new Error(`Invalid element at key "${k}": expected a Zod schema`);
+      }
+    }
     const okeys = util.optionalKeys(def.shape);
 
     return {

play.ts

@@ -1,5 +1,3 @@
 import { z } from "zod/v4";
 
-console.dir(z.toJSONSchema(z.string().startsWith("hello").includes("cruel").endsWith("world").regex(/stuff/)), {
-  depth: null,
-});
+console.dir(z.string(), { depth: null });