See conversation: https://dart-review.googlesource.com/c/sdk/+/108964

Context from @danrubel:

In the process of working on another dartfix CL, I discovered a race condition with how dartfix currently works with lints/assists/fixes. Last week Brian and I discussed some ways to correct the problem but I have not had time to work on it.