Describe what you were doing when the bug occurred:
1. recorded profiling results
2. browsing results by paging to the right
3. crash

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DevTools version: 4.8.2-fed4ae024

Call stack: at updateTree (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:17854:21)
    at getCommitTree (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:17717:25)
    at ProfilingCache.getCommitTree (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:18265:14)
    at CommitFlamegraphAutoSizer (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:31718:33)
    at vh (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:11067:7)
    at fi (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:11733:7)
    at ck (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:14430:86)
    at bk (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:13779:11)
    at ak (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:13768:5)
    at Sj (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:13750:7)

Component stack: at CommitFlamegraphAutoSizer (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:31701:48)
    at div
    at div
    at div
    at SettingsModalContextController (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:26139:23)
    at Profiler_Profiler (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:33363:48)
    at ErrorBoundary (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:27172:5)
    at PortaledContent (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:27303:32)
    at div
    at div
    at ProfilerContextController (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:30463:23)
    at TreeContextController (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:22538:23)
    at SettingsContextController (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:23040:27)
    at ModalDialogContextController (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:28328:23)
    at DevTools_DevTools (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:33797:21)
}
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       p
      if (parentA.child === parentB.child) {
        let child = parentA.child;
        while (child) {
          if (child === a) {
             W
            if (isFiberMountedImpl(parentA) !== MOUNTED) {
              throw Error('Unable to find node on an unmounted component.');
            }
            return fiber;
          }
          if (child === b) {
             W
            if (isFiberMountedImpl(parentA) !== MOUNTED) {
              throw Error('Unable to find node on an unmounted component.');
            }
            return alternate;
          }
          child = child.sibling;
        }
         W
         w
        throw Error('Unable to find node on an unmounted component.');
      }
      if (a.return !== b.return) {
         T
         f