I was testing latest refactor of PerfTools.
When using printOperations() often (but not always) I get 

```
Uncaught TypeError: Cannot read property 'displayName' of undefined
```

in getOperations() on the line:

```
var {displayName, ownerID} = treeSnapshot[instanceID];
```

} else {
    if (stringText) {
      
      
      setTextContent(nodeAfterComment, stringText);
      removeDelimitedText(parentNode, nodeAfterComment, closingComment);
    } else {
      removeDelimitedText(parentNode, openingComment, closingComment);
    }
  }
  if (__DEV__) {
    ReactInstrumentation.debugTool.onNativeOperation(
      ReactDOMComponentTree.getInstanceFromNode(openingComment)._debugID,
      'replace text',
      stringText
    );
  }
}
var dangerouslyReplaceNodeWithMarkup = Danger.dangerouslyReplaceNodeWithMarkup;
if (__DEV__) {
  dangerouslyReplaceNodeWithMarkup = function(oldChild, markup, prevInstance) {
    Danger.dangerouslyReplaceNodeWithMarkup(oldChild, markup);
    ReactInstrumentation.debugTool.onNativeOperation(
      prevInstance._debugID,
      'replace with',
      markup.toString()
    );
  };
}
/**