Mac Host Engine flakes on ShellTest

[keyonghan]

• Example builds for WaitForFirstFrame flakes:
  https://ci.chromium.org/ui/p/flutter/builders/prod/Mac%20Host%20Engine/17415/overview

• Example builds for WaitForFirstFrameMultiple flakes:
  https://ci.chromium.org/ui/p/flutter/builders/prod/Mac%20Host%20Engine/17343/overview

[chinmaygarde]

We'll have to take a look at this more closely. We did not verify the logic around the signaling of the waiting_for_first_frame_condition_ CV in the test fixture.

@keyonghan How often is this happening?

[keyonghan]

We'll have to take a look at this more closely. We did not verify the logic around the signaling of the waiting_for_first_frame_condition_ CV in the test fixture.

@keyonghan How often is this happening?

By the time I filed this bug, it flaked twice (those two listed in the bug description) in the recent 100 commits.

[chinmaygarde]

I took a look at this the other day and the issue may be in latching around a utility in the fixture itself. So it should affect all tests that wait for frames. I haven't had a chance to take a closer look at fixing this. If this has no takers this week, I can spend some time getting to the bottom of it.

[zanderso]

Over the last ~100 builds Mac Host Engine has flaked only twice, so I am going to reduce the priority of this relative some work that's happening for the upcoming stable.

[flutter-triage-bot]

This issue is assigned but has had no recent status updates. Please consider unassigning this issue if it is not going to be addressed in the near future. This allows people to have a clearer picture of what work is actually planned. Thanks!

[zanderso]

Closing as presumed stale.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.