Flaky test: tests/ui/threads-sendsync/tcp-stress.rs #144878
Description
Test tests/ui/threads-sendsync/tcp-stress.rs sometimes fails for reasons unrelated to the changes being tested.
Examples:
- Rollup of 13 pull requests #144850 (comment)
- Shard AllocMap Lock #136115 (comment)
- Fix HashMap not displaying correctly in VS debugger #93626 (comment)
The failure is triggered by an arbitrary hard-coded timeout of 30 seconds, so this probably happens when the runner is temporarily distracted by other things and can't clean up 200 threads in time.