### 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
```
);
      } else {
        ((rootToCommitProfilingMetadataMap: any): CommitProfilingMetadataMap).set(
          currentRootID,
          [((currentCommitProfilingMetadata: any): CommitProfilingData)],
        );
      }
    }
     We're done here.
    flushPendingEvents(root);
    if (traceUpdatesEnabled) {
      hook.emit('traceUpdates', traceUpdatesForNodes);
    }
    currentRootID = -1;
  }
  function findAllCurrentHostFibers(id: number): $ReadOnlyArray<Fiber> {
    const fibers = [];
    const fiber = findCurrentFiberUsingSlowPathById(id);
    if (!fiber) {
      return fibers;
    }
     Next we'll drill down this component to find all HostComponent/Text.
    let node: Fiber = fiber;
    while (true) {
      if (node.tag === HostComponent || node.tag === HostText) {
        fibers.push(node);
      } else if (node.child) {
        node.child.return = node;
        node = node.child;
        continue;