Looks like we can't reproduce the issue or there's a problem in the test case provided.
Renaming a custom component sometimes gives an error and deletes the component
Every once in a while, if you rename a custom component, you see an error box:
RangeError: Maximum call stack size exceeded.
This wouldn't be such a huge deal (as you can safely 'Ignore') but it also deletes the custom component!
Any additional steps to reproduce? Build 298 or 309?
It was happening with nearly every custom component I tried in Build 298. It appears to be fixed in 309, I can't reproduce.
Okay, please let us know if you encounter it again.