stream_controller_async_test and stream_join_test are built on
async_minitest, so most of the issues were fixed by migrating it to use
Never as the bottom type rather than Null.
Change-Id: I6f43e818a7a8d6793844166c8f9fc07b3b0f7a16
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/143562
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
Commit-Queue: Liam Appelbe <liama@google.com>
Liam Appelbe
2e75c3d7ca