fix: correctly copy getters in deepCyclicCopy

CHANGELOG.md

@@ -84,6 +84,7 @@
   - [**BREAKING**] `--testPathPattern` is now `--testPathPatterns`
   - [**BREAKING**] Specifying `testPathPatterns` when programmatically calling `watch` must be specified as `new TestPathPatterns(patterns)`, where `TestPathPatterns` can be imported from `@jest/pattern`
 - `[jest-reporters, jest-runner]` Unhandled errors without stack get correctly logged to console ([#14619](https://github.com/jestjs/jest/pull/14619))
+- `[jest-util]` Correctly copy getters in `deepCyclicCopy` ([#15265](https://github.com/jestjs/jest/pull/15265))
 - `[jest-worker]` Properly handle a circular reference error when worker tries to send an assertion fails where either the expected or actual value is circular ([#15191](https://github.com/jestjs/jest/pull/15191))
 - `[jest-worker]` Properly handle a BigInt when worker tries to send an assertion fails where either the expected or actual value is BigInt ([#15191](https://github.com/jestjs/jest/pull/15191))
 

packages/jest-util/src/__tests__/deepCyclicCopy.test.ts

@@ -34,6 +34,13 @@ it('does not execute getters/setters, but copies them', () => {
   expect(fn).not.toHaveBeenCalled();
 });
 
+test('keeps error stack getter', () => {
+  const obj = new Error('hello');
+  const copy = deepCyclicCopy(obj);
+
+  expect(obj.stack).toBe(copy.stack);
+});
+
 it('copies symbols', () => {
   const symbol = Symbol('foo');
   const obj = {[symbol]: 42};

packages/jest-util/src/deepCyclicCopy.ts

@@ -42,19 +42,28 @@ function deepCyclicCopyObject<T>(
 
   cycles.set(object, newObject);
 
-  for (const key of Object.keys(descriptors)) {
+  for (const [key, descriptor] of Object.entries(descriptors)) {
     if (options.blacklist && options.blacklist.has(key)) {
       delete descriptors[key];
       continue;
     }
 
-    const descriptor = descriptors[key];
     if (descriptor.value !== undefined) {
       descriptor.value = deepCyclicCopy(
         descriptor.value,
         {blacklist: EMPTY, keepPrototype: options.keepPrototype},
         cycles,
       );
+    } else if (typeof descriptor.get === 'function') {
+      descriptor.get = () => {
+        const value: unknown = (object as any)[key];
+
+        return deepCyclicCopy(
+          value,
+          {blacklist: EMPTY, keepPrototype: options.keepPrototype},
+          cycles,
+        );
+      };
     }
 
     descriptor.configurable = true;