fix: devtools source field disappears after component remount

[idango10]

Summary

Fixes: #27296

On actions that cause a component to change its signature, and therefore to remount, the _debugSource property of the fiber updates in delay and causes the devtools source field to vanish.

This issue happens in https://github.com/facebook/react/blob/main/packages/react-reconciler/src/ReactFiberBeginWork.js

function beginWork(
  current: Fiber | null,
  workInProgress: Fiber,
  renderLanes: Lanes,
): Fiber | null {
  if (__DEV__) {
    if (workInProgress._debugNeedsRemount && current !== null) {
      // This will restart the begin phase with a new fiber.
      return remountFiber(
        current,
        workInProgress,
        createFiberFromTypeAndProps(
          workInProgress.type,
          workInProgress.key,
          workInProgress.pendingProps,
          workInProgress._debugOwner || null,
          workInProgress.mode,
          workInProgress.lanes,
        ),
      );
    }
  }

  // ...

remountFiber uses the 3rd parameter as the new fiber (createFiberFromTypeAndProps(...)), but this parameter doesn’t contain a _debugSource.

How did you test this change?

Tested by monkey patching ./node_modules/react-dom/cjs/react-dom.development.js:

Screen.Recording.2023-08-28.at.20.39.54.2.mov

[react-sizebot]

Comparing: 2f36872...ef1d7e7

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.min.js	+0.01%	165.61 kB	165.63 kB	=	51.88 kB	51.88 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	+0.01%	174.69 kB	174.70 kB	=	54.61 kB	54.61 kB
facebook-www/ReactDOM-prod.classic.js	=	570.39 kB	570.44 kB	=	100.44 kB	100.45 kB
facebook-www/ReactDOM-prod.modern.js	=	554.19 kB	554.21 kB	=	97.61 kB	97.61 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against ef1d7e7

[hoxyq]

Thanks for fixing this!