Describe what you were doing when the bug occurred:
1. 
2. 
3. 

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DevTools version: 4.11.0-39713716aa

Call stack: at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:20884:13
    at Map.forEach (<anonymous>)
    at RankedChartBuilder_getChartData (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:20880:24)
    at ProfilingCache_ProfilingCache.getRankedChartData (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:21004:11)
    at CommitRankedAutoSizer (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:35717:32)
    at Rh (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:13245:7)
    at Ci (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:13944:7)
    at uk (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:16725:86)
    at tk (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:16245:11)
    at qk (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:16237:23)

Component stack: at CommitRankedAutoSizer (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:35696:34)
    at div
    at div
    at div
    at SettingsModalContextController (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:29121:3)
    at Profiler_Profiler (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:37243:34)
    at ErrorBoundary_ErrorBoundary (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:30035:5)
    at PortaledContent (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:30157:5)
    at div
    at div
    at ProfilerContextController (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:34264:3)
    at TreeContextController (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:25356:3)
    at SettingsContextController (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:25963:3)
    at ModalDialogContextController (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:30300:3)
    at DevTools_DevTools (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:37639:3)
const errorCountsMap = fiberToErrorsMap.get(fiberID);
          const warningCountsMap = fiberToWarningsMap.get(fiberID);
          if (errorCountsMap != null) {
            errorCountsMap.forEach(count => {
              errorCount += count;
            });
          }
          if (warningCountsMap != null) {
            warningCountsMap.forEach(count => {
              warningCount += count;
            });
          }
        }
        pushOperation(TREE_OPERATION_UPDATE_ERRORS_OR_WARNINGS);
        pushOperation(fiberID);
        pushOperation(errorCount);
        pushOperation(warningCount);
      }
    });
    fibersWithChangedErrorOrWarningCounts.clear();
  }
  function flushPendingEvents(root: Object): void {
     Add any pending errors and warnings to the operations array.
     We do this just before flushing, so we can ignore errors for no-longer-mounted Fibers.
    recordPendingErrorsAndWarnings();
    if (
      pendingOperations.length === 0 &&
      pendingRealUnmountedIDs.length === 0 &&
      pendingSimulatedUnmountedIDs.length === 0 &&
      pendingUnmountedRootID === null