In this [issue](https://github.com/facebook/react/issues/23373), when you navigate to [this app](https://next-rsc-notes.vercel.app/note/1646289027680) and inspect the sidebar in the components tab, you will get this error:

![image](https://user-images.githubusercontent.com/2735514/158241727-64eba8f9-5ac2-4aa7-bffa-ff9b3174a261.png)

 This is a user error. One of the components in the user's app thrown. However, the UI for this is confusing, because it seems like it's a DevTools error. We've gotten a lot of bug reports like this, and it would be good to differentiate between DevTools bugs and bugs in the app. For this task:

- [ ] Build the React DevTools extension locally (instructions [here](https://github.com/facebook/react/tree/main/packages/react-devtools-extensions)) and reproduce the error
- [ ] Figure out a way to have the front end be able to differentiate whether the error is a error within DevTools or within the user's app
- [ ] Design/implement a better UI to help app developers distinguish between these two cases
if (trackedPath === null || !mightBeOnTrackedPath) {
       F
      return false;
    }
    const returnFiber = fiber.return;
    const returnAlternate = returnFiber !== null ? returnFiber.alternate : null;
     By now we know there's some selection to restore, and this is a new Fiber.
     Is this newly mounted Fiber a direct child of the current best match?
     (This will also be true for new roots if we haven't matched anything yet.)
    if (
      trackedPathMatchFiber === returnFiber ||
      (trackedPathMatchFiber === returnAlternate && returnAlternate !== null)
    ) {
       I
      const actualFrame = getPathFrame(fiber);
      const expectedFrame = trackedPath[trackedPathMatchDepth + 1];
      if (expectedFrame === undefined) {
        throw new Error('Expected to see a frame at the next depth.');
      }
      if (
        actualFrame.index === expectedFrame.index &&
        actualFrame.key === expectedFrame.key &&
        actualFrame.displayName === expectedFrame.displayName
      ) {
         W
        trackedPathMatchFiber = fiber;
        trackedPathMatchDepth++;
         A
        if (trackedPathMatchDepth === trackedPath.length - 1) {
           T