### 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
```
}
            return alternate;
          }
          child = child.sibling;
        }
         We 
         way 
        throw Error('Unable to find node on an unmounted component.');
      }
      if (a.return !== b.return) {
         The 
         fib
         bel
         set 
        a = parentA;
        b = parentB;
      } else {
         The 
         def
         whi
        
         Sea
        let didFindChild = false;
        let child = parentA.child;
        while (child) {
          if (child === a) {
            didFindChild = true;
            a = parentA;
            b = parentB;
            break;