Switching branches to a branch with a different .analysis_options doesn't change the options the analyzer server is using

[Hixie]

Suppose I have two git branches of the flutter repo, one is trunk, and the other is trunk plus a new lint in the analysis options file plus a bunch of fixes for that lint.

Now suppose I'm on the lint branch, and I run flutter analyze --watch --write /tmp/analyzer-watch-output --flutter-repo and then switch git branches to the master branch. The analyzer starts reporting the errors as if the .flutter_analysis file was that of the lint branch, but with the code from the master branch.