John McCutchan da447b9297 Fix 303652511 and add a regression test (flutter/engine#46743) ...

Fixes internal bug b/303652511 and includes a regression test.

The TL;DR of the bug is that when re-launching a singleton-cached-engine
Flutter activity using FLAG_ACTIVITY_CLEAR_TASK, the teardown of the
previous Flutter activity interleaves with the creation of the new
Flutter activity, resulting in the Flutter engine ending up incorrectly
in the AppLifecycleState.detached state. This then results in the app
being completely unresponsive because Flutter doesn't draw frames in
this state. I don't know if the issue is reproducible in production
under normal user operation, but I'm concerned it very easily could be.
There's also nothing stopping other apps or Android system code from
launching an app using this flag.

2023-10-11 11:29:04 -07:00

..

src/flutter

Fix 303652511 and add a regression test (flutter/engine#46743)

2023-10-11 11:29:04 -07:00