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Recover from errors with a boundary in completion phase #14104

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merged 7 commits into from
Nov 6, 2018
Merged

Recover from errors with a boundary in completion phase #14104

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0aaf5e8
Recover from errors with a boundary in completion phase
gaearon Nov 5, 2018
9b82c9f
Use a separate field for completing unit of work
gaearon Nov 5, 2018
f644cb2
Use a simpler fix with one boolean
gaearon Nov 5, 2018
0fb8440
Reoder conditions
gaearon Nov 6, 2018
ac7c3ab
Clarify which paths are DEV-only
gaearon Nov 6, 2018
3b93b2e
Move duplicated line out
gaearon Nov 6, 2018
22158a5
Make it clearer this code is DEV-only
gaearon Nov 6, 2018
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15 changes: 15 additions & 0 deletions packages/react-dom/src/__tests__/ReactErrorBoundaries-test.internal.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2149,4 +2149,19 @@ describe('ReactErrorBoundaries', () => {
expect(componentDidCatchError).toBe(thrownError);
expect(getDerivedStateFromErrorError).toBe(thrownError);
});

it('should catch errors from invariants in completion phase', () => {
const container = document.createElement('div');
ReactDOM.render(
<ErrorBoundary>
<input>
<div />
</input>
</ErrorBoundary>,
container,
);
expect(container.textContent).toContain(
'Caught an error: input is a void element tag',
);
});
});
19 changes: 16 additions & 3 deletions packages/react-reconciler/src/ReactFiberScheduler.js
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Original file line number Diff line number Diff line change
Expand Up @@ -263,6 +263,7 @@ let nextRenderDidError: boolean = false;
let nextEffect: Fiber | null = null;

let isCommitting: boolean = false;
let isCompleting: boolean = false;
let rootWithPendingPassiveEffects: FiberRoot | null = null;
let passiveEffectCallbackHandle: * = null;
let passiveEffectCallback: * = null;
Expand Down Expand Up @@ -953,22 +954,30 @@ function completeUnitOfWork(workInProgress: Fiber): Fiber | null {
startProfilerTimer(workInProgress);
}

// Remember we're completing this unit so we can find a boundary if it fails.
isCompleting = true;
nextUnitOfWork = workInProgress;
nextUnitOfWork = completeWork(
current,
workInProgress,
nextRenderExpirationTime,
);
isCompleting = false;

if (workInProgress.mode & ProfileMode) {
// Update render duration assuming we didn't error.
stopProfilerTimerIfRunningAndRecordDelta(workInProgress, false);
}
} else {
// Remember we're completing this unit so we can find a boundary if it fails.
isCompleting = true;
nextUnitOfWork = workInProgress;
nextUnitOfWork = completeWork(
current,
workInProgress,
nextRenderExpirationTime,
);
isCompleting = false;
}
stopWorkTimer(workInProgress);
resetChildExpirationTime(workInProgress, nextRenderExpirationTime);
Expand Down Expand Up @@ -1277,6 +1286,8 @@ function renderRoot(root: FiberRoot, isYieldy: boolean): void {
resetContextDependences();
resetHooks();

const wasCompleting = isCompleting;
isCompleting = false;
if (nextUnitOfWork === null) {
// This is a fatal error.
didFatal = true;
Expand All @@ -1288,9 +1299,11 @@ function renderRoot(root: FiberRoot, isYieldy: boolean): void {
(resetCurrentlyProcessingQueue: any)();
}

const failedUnitOfWork: Fiber = nextUnitOfWork;
if (__DEV__ && replayFailedUnitOfWorkWithInvokeGuardedCallback) {
replayUnitOfWork(failedUnitOfWork, thrownValue, isYieldy);
if (!wasCompleting) {
const failedUnitOfWork: Fiber = nextUnitOfWork;
if (__DEV__ && replayFailedUnitOfWorkWithInvokeGuardedCallback) {
replayUnitOfWork(failedUnitOfWork, thrownValue, isYieldy);
}
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Does this mean that the bug only happens when in DEV?

Also, couldn't this code be combined into the following block to avoid implying that the conditions/variables have any effect in production?

        if (__DEV__) {
          // Reset global debug state
          // We assume this is defined in DEV
          (resetCurrentlyProcessingQueue: any)();

          if (!wasCompleting && replayFailedUnitOfWorkWithInvokeGuardedCallback) {
            const failedUnitOfWork: Fiber = nextUnitOfWork;
            replayUnitOfWork(failedUnitOfWork, thrownValue, isYieldy);
          }
        }

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@gaearon gaearon Nov 6, 2018 •
edited
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Thanks. I pushed another commit that clarifies which parts of the fix are DEV-only.

}

// TODO: we already know this isn't true in some cases.
Expand Down