### Describe what you were doing when the bug occurred:
1. I did profiling on a list, that gets updated on each pagination api call.
2. Once the profiling was done, I moved around in the Profiler to view the Flamegraph
3. Moving to second capture, the Profiler crashed.


**DevTools version**: 4.6.0-6cceaeb67

```
Component stack: in ec
    in div
    in div
    in div
    in So
    in Unknown
    in n
    in Unknown
    in div
    in div
    in rl
    in Ze
    in fn
    in Ga
    in _s
```
setTraceUpdatesEnabled = (traceUpdatesEnabled: boolean) => {
    this._traceUpdatesEnabled = traceUpdatesEnabled;
    setTraceUpdatesEnabled(traceUpdatesEnabled);
    for (const rendererID in this._rendererInterfaces) {
      const renderer = ((this._rendererInterfaces[
        (rendererID: any)
      ]: any): RendererInterface);
      renderer.setTraceUpdatesEnabled(traceUpdatesEnabled);
    }
  };
  syncSelectionFromNativeElementsPanel = () => {
    const target = window.__REACT_DEVTOOLS_GLOBAL_HOOK__.$0;
    if (target == null) {
      return;
    }
    this.selectNode(target);
  };
  shutdown = () => {
    
    this.emit('shutdown');
  };
  startProfiling = (recordChangeDescriptions: boolean) => {
    this._recordChangeDescriptions = recordChangeDescriptions;
    this._isProfiling = true;
    for (const rendererID in this._rendererInterfaces) {
      const renderer = ((this._rendererInterfaces[
        (rendererID: any)
      ]: any): RendererInterface);
      renderer.startProfiling(recordChangeDescriptions);
    }