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DevTools: Fix memory leak via alternate Fiber pointer #22346

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Sep 17, 2021
Merged

DevTools: Fix memory leak via alternate Fiber pointer #22346

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7 changes: 7 additions & 0 deletions packages/react-devtools-shared/src/backend/renderer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1140,6 +1140,13 @@ export function attach(

untrackFibersSet.add(fiber);

// React may detach alternate pointers during unmount;
// Since our untracking code is async, we should explicily track the pending alternate here as well.
const alternate = fiber.alternate;
if (alternate !== null) {
untrackFibersSet.add(alternate);
}

if (untrackFibersTimeoutID === null) {
untrackFibersTimeoutID = setTimeout(untrackFibers, 1000);
}
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