Enhancement: is mutex poisoning a worthwhile feature for a std mutex compatible version

[tttwang23]

Rust standard libray's version of Mutex has a useful feature of mutex poisoning. If a mutex owning thread panics, then the mutex is marked as poisoned so that other threads could balk and prepare for app shutdown.

Is there value to provide a parking_lot styled mutex implementation that also have this poisoning feature?

[Amanieu]

I strongly believe that mutex poisoning is an anti-feature: it hurts usability and reliability. The only reason is it kept in the standard library is because this feature is already stable and cannot be removed.

[tttwang23]

Interesting; thanks!

[John-Nagle]

I'm in favor of mutex poisoning. When one thread has panicked, you don't want other threads advancing into crashed state while you're trying to shut everything down cleanly. Use case: GUI-type programs, where you may want to give the user a message on screen, save some state, and send in a crash report before exiting.