Warning: Tried to initialize from a previous compilation

[goderbauer]

During a flutter test run I got the following message. Reported here as requested.

Compiler message:
Warning: Tried to initialize from a previous compilation (file:///Users/goderbauer/dev/flutter/packages/flutter/build/testfile.dill), but the file was not self-contained. This might be a bug.

The Dart team would greatly appreciate it if you would take a moment to report this problem at http://dartbug.com/new.
If you are comfortable with it, it would improve the chances of fixing any bug if you included the file file:///var/folders/t2/r2h8ytq53_x45hn80bhpb0ww0044f6/T/initialize_from.dillVuR3Vz/initialize_from.dill.gz in your error report, but be aware that this file includes your source code.
Either way, you should probably delete the file so it doesn't use unnecessary disk space.

initialize_from.dill.gz

[goderbauer]

See also: #35695, #35476

[jensjoha]

flutter/engine@1946082 was done at around the time this bug was submitted.
Is it possible that you checked out a (slightly) older version of flutter, and then tested with that?

If the initialize-from-dill file was created with a version on or after flutter/flutter@9b053dd and you then went back to a version of flutter before flutter/flutter@b5e0973, we cannot initialize from the dill because the assumed sdk-file doesn't include the "enum Brightness" (we cannot find root::dart:ui::Brightness).

We certainly need a mechanism to catch stuff like this. I created #36032 for that.

[jensjoha]

I'll assume the above was correct. #36032 was created to remedy such situations (although its still not fixed).