diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-entries-mutation.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-entries-mutation.expect.md
new file mode 100644
index 0000000000..09ff6e7214
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-entries-mutation.expect.md
@@ -0,0 +1,57 @@
+
+## Input
+
+```javascript
+// @validatePreserveExistingMemoizationGuarantees
+import {makeObject_Primitives, Stringify} from 'shared-runtime';
+
+function Component(props) {
+  const object = {object: props.object};
+  const entries = useMemo(() => Object.entries(object), [object]);
+  entries.map(([, value]) => {
+    value.updated = true;
+  });
+  return <Stringify entries={entries} />;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{object: {key: makeObject_Primitives()}}],
+};
+
+```
+
+
+## Error
+
+```
+Found 2 errors:
+
+Memoization: Compilation skipped because existing memoization could not be preserved
+
+React Compiler has skipped optimizing this component because the existing manual memoization could not be preserved. This dependency may be mutated later, which could cause the value to change unexpectedly.
+
+error.validate-object-entries-mutation.ts:6:57
+  4 | function Component(props) {
+  5 |   const object = {object: props.object};
+> 6 |   const entries = useMemo(() => Object.entries(object), [object]);
+    |                                                          ^^^^^^ This dependency may be modified later
+  7 |   entries.map(([, value]) => {
+  8 |     value.updated = true;
+  9 |   });
+
+Memoization: Compilation skipped because existing memoization could not be preserved
+
+React Compiler has skipped optimizing this component because the existing manual memoization could not be preserved. This value was memoized in source but not in compilation output.
+
+error.validate-object-entries-mutation.ts:6:18
+  4 | function Component(props) {
+  5 |   const object = {object: props.object};
+> 6 |   const entries = useMemo(() => Object.entries(object), [object]);
+    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Could not preserve existing memoization
+  7 |   entries.map(([, value]) => {
+  8 |     value.updated = true;
+  9 |   });
+```
+          
+      
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-entries-mutation.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-entries-mutation.js
new file mode 100644
index 0000000000..b4145b1617
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-entries-mutation.js
@@ -0,0 +1,16 @@
+// @validatePreserveExistingMemoizationGuarantees
+import {makeObject_Primitives, Stringify} from 'shared-runtime';
+
+function Component(props) {
+  const object = {object: props.object};
+  const entries = useMemo(() => Object.entries(object), [object]);
+  entries.map(([, value]) => {
+    value.updated = true;
+  });
+  return <Stringify entries={entries} />;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{object: {key: makeObject_Primitives()}}],
+};
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-values-mutation.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-values-mutation.expect.md
new file mode 100644
index 0000000000..b791b62927
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-values-mutation.expect.md
@@ -0,0 +1,57 @@
+
+## Input
+
+```javascript
+// @validatePreserveExistingMemoizationGuarantees
+import {makeObject_Primitives, Stringify} from 'shared-runtime';
+
+function Component(props) {
+  const object = {object: props.object};
+  const values = useMemo(() => Object.values(object), [object]);
+  values.map(value => {
+    value.updated = true;
+  });
+  return <Stringify values={values} />;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{object: {key: makeObject_Primitives()}}],
+};
+
+```
+
+
+## Error
+
+```
+Found 2 errors:
+
+Memoization: Compilation skipped because existing memoization could not be preserved
+
+React Compiler has skipped optimizing this component because the existing manual memoization could not be preserved. This dependency may be mutated later, which could cause the value to change unexpectedly.
+
+error.validate-object-values-mutation.ts:6:55
+  4 | function Component(props) {
+  5 |   const object = {object: props.object};
+> 6 |   const values = useMemo(() => Object.values(object), [object]);
+    |                                                        ^^^^^^ This dependency may be modified later
+  7 |   values.map(value => {
+  8 |     value.updated = true;
+  9 |   });
+
+Memoization: Compilation skipped because existing memoization could not be preserved
+
+React Compiler has skipped optimizing this component because the existing manual memoization could not be preserved. This value was memoized in source but not in compilation output.
+
+error.validate-object-values-mutation.ts:6:17
+  4 | function Component(props) {
+  5 |   const object = {object: props.object};
+> 6 |   const values = useMemo(() => Object.values(object), [object]);
+    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Could not preserve existing memoization
+  7 |   values.map(value => {
+  8 |     value.updated = true;
+  9 |   });
+```
+          
+      
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-values-mutation.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-values-mutation.js
new file mode 100644
index 0000000000..3482887d92
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-values-mutation.js
@@ -0,0 +1,16 @@
+// @validatePreserveExistingMemoizationGuarantees
+import {makeObject_Primitives, Stringify} from 'shared-runtime';
+
+function Component(props) {
+  const object = {object: props.object};
+  const values = useMemo(() => Object.values(object), [object]);
+  values.map(value => {
+    value.updated = true;
+  });
+  return <Stringify values={values} />;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{object: {key: makeObject_Primitives()}}],
+};
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-entries-mutation.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-entries-mutation.expect.md
new file mode 100644
index 0000000000..bc541b47f1
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-entries-mutation.expect.md
@@ -0,0 +1,57 @@
+
+## Input
+
+```javascript
+import {makeObject_Primitives, Stringify} from 'shared-runtime';
+
+function Component(props) {
+  const object = {object: props.object};
+  const entries = Object.entries(object);
+  entries.map(([, value]) => {
+    value.updated = true;
+  });
+  return <Stringify entries={entries} />;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{object: {key: makeObject_Primitives()}}],
+};
+
+```
+
+## Code
+
+```javascript
+import { c as _c } from "react/compiler-runtime";
+import { makeObject_Primitives, Stringify } from "shared-runtime";
+
+function Component(props) {
+  const $ = _c(2);
+  let t0;
+  if ($[0] !== props.object) {
+    const object = { object: props.object };
+    const entries = Object.entries(object);
+    entries.map(_temp);
+    t0 = <Stringify entries={entries} />;
+    $[0] = props.object;
+    $[1] = t0;
+  } else {
+    t0 = $[1];
+  }
+  return t0;
+}
+function _temp(t0) {
+  const [, value] = t0;
+  value.updated = true;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{ object: { key: makeObject_Primitives() } }],
+};
+
+```
+      
+### Eval output
+(kind: ok) <div>{"entries":[["object",{"key":{"a":0,"b":"value1","c":true},"updated":true}]]}</div>
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-entries-mutation.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-entries-mutation.js
new file mode 100644
index 0000000000..2902cffd01
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-entries-mutation.js
@@ -0,0 +1,15 @@
+import {makeObject_Primitives, Stringify} from 'shared-runtime';
+
+function Component(props) {
+  const object = {object: props.object};
+  const entries = Object.entries(object);
+  entries.map(([, value]) => {
+    value.updated = true;
+  });
+  return <Stringify entries={entries} />;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{object: {key: makeObject_Primitives()}}],
+};
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-values-mutation.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-values-mutation.expect.md
new file mode 100644
index 0000000000..bc541b47f1
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-values-mutation.expect.md
@@ -0,0 +1,57 @@
+
+## Input
+
+```javascript
+import {makeObject_Primitives, Stringify} from 'shared-runtime';
+
+function Component(props) {
+  const object = {object: props.object};
+  const entries = Object.entries(object);
+  entries.map(([, value]) => {
+    value.updated = true;
+  });
+  return <Stringify entries={entries} />;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{object: {key: makeObject_Primitives()}}],
+};
+
+```
+
+## Code
+
+```javascript
+import { c as _c } from "react/compiler-runtime";
+import { makeObject_Primitives, Stringify } from "shared-runtime";
+
+function Component(props) {
+  const $ = _c(2);
+  let t0;
+  if ($[0] !== props.object) {
+    const object = { object: props.object };
+    const entries = Object.entries(object);
+    entries.map(_temp);
+    t0 = <Stringify entries={entries} />;
+    $[0] = props.object;
+    $[1] = t0;
+  } else {
+    t0 = $[1];
+  }
+  return t0;
+}
+function _temp(t0) {
+  const [, value] = t0;
+  value.updated = true;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{ object: { key: makeObject_Primitives() } }],
+};
+
+```
+      
+### Eval output
+(kind: ok) <div>{"entries":[["object",{"key":{"a":0,"b":"value1","c":true},"updated":true}]]}</div>
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-values-mutation.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-values-mutation.js
new file mode 100644
index 0000000000..2902cffd01
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/object-values-mutation.js
@@ -0,0 +1,15 @@
+import {makeObject_Primitives, Stringify} from 'shared-runtime';
+
+function Component(props) {
+  const object = {object: props.object};
+  const entries = Object.entries(object);
+  entries.map(([, value]) => {
+    value.updated = true;
+  });
+  return <Stringify entries={entries} />;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{object: {key: makeObject_Primitives()}}],
+};