If `join-thread' timeout, the thread mutex is not unlocked, resulting in
deadlock to the next call to it or deadlock of the thread itself when it
terminates.
Thus, always unlock the mutex.
Fix: #55356
* module/ice-9/threads.scm (join-thread): Always unlock thread mutex.
* test-suite/tests/thread
Hello,
Olivier Dion skribis:
> If `join-thread' timeout, the thread mutex is not unlocked, resulting in
> deadlock to the next call to it or deadlock of the thread itself when it
> terminates.
>
> Thus, always unlock the mutex.
>
> Fix: #55356
>
> * module/ice-9/threads.scm (join-thread): Always
