Function overrideError

packages/react-devtools-shared/src/backend/fiber/renderer.js:7756–7797

(id: number, forceError: boolean)

  }

  function overrideError(id: number, forceError: boolean) {
    if (
      typeof setErrorHandler !== 'function' ||
      typeof scheduleUpdate !== 'function'
    ) {
      throw new Error(
        'Expected overrideError() to not get called for earlier React versions.',
      );
    }

    const devtoolsInstance = idToDevToolsInstanceMap.get(id);
    if (devtoolsInstance === undefined) {
      return;
    }
    const nearestFiber = getNearestFiber(devtoolsInstance);
    if (nearestFiber === null) {
      return;
    }
    let fiber = nearestFiber;
    while (!isErrorBoundary(fiber)) {
      if (fiber.return === null) {
        return;
      }
      fiber = fiber.return;
    }
    forceErrorForFibers.set(fiber, forceError);
    if (fiber.alternate !== null) {
      // We only need one of the Fibers in the set.
      forceErrorForFibers.delete(fiber.alternate);
    }
    if (forceErrorForFibers.size === 1) {
      // First override is added. Switch React to slower path.
      setErrorHandler(shouldErrorFiberAccordingToMap);
    }
    if (!forceError && typeof scheduleRetry === 'function') {
      // If we're dismissing an error and the renderer supports it, use a Retry instead of Sync
      // This would allow View Transitions to proceed as if the error was dismissed using a Transition.
      scheduleRetry(fiber);
    } else {
      scheduleUpdate(fiber);
    }
  }

  function shouldSuspendFiberAlwaysFalse() {
    return false;