React version:Experimental / latest commit

Steps To Reproduce

1. Clone the React repository.
2. Run the following test:
   yarn test packages/react-server/src/tests/ReactFlightAsyncDebugInfo-test.js --testNamePattern="can track async information when awaited" --runInBand --verbose
3. Observe that the test fails due to a snapshot mismatch.

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Link to code example: packages/react-server/src/tests/ReactFlightAsyncDebugInfo-test.js

Context: Snapshot Mismatch in ReactFlightAsyncDebugInfo-test

Failing Test Case

test("can track async information when awaited", async () => {
const result = await someAsyncFunction();
expect(getDebugInfo(result)).toMatchInlineSnapshot(Object { "value": undefined, });
});

implementation

export async function someAsyncFunction() {
return {
value: [undefined],
};
}
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Actual Output

Object {
  "value": [undefined],
}

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## The current behavior
The inline snapshot does not match the current output. The test expects `"value": undefined` but receives `"value": [ , ]`.

## The expected behavior
The test should pass and the snapshot should match the current output.