### 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
```
node.tag === SuspenseComponent && node.memoizedState !== null;
        if (isTimedOutSuspense) {
           Not
          const primaryChildFragment = node.child;
          const fallbackChildFragment = primaryChildFragment
            ? primaryChildFragment.sibling
            : null;
          if (prevNode !== fallbackChildFragment) {
            return UNMOUNTED;
          }
        }
      }
    } else {
      while (node.return) {
        node = node.return;
      }
    }
    if (node.tag === HostRoot) {
       TOD
       ren
      return MOUNTED;
    }
     If we didn't hit the root, that means that we're in an disconnected tree
     that has been unmounted.
    return UNMOUNTED;
  }
   This function is copied from React and should be kept in sync:
   https:github.com/facebook/react/blob/master/packages/react-reconciler/src/ReactFiberTreeReflection.js
   It would be nice if we updated React to inject this function directly (vs just indirectly via findDOMNode).
   BEGIN copied code