bug#64666: Nested ‘scm_sigaction_for_thread’ calls lead to deadlock

Ludovic Courtès <[email protected]> skribis:

> It’s possible for ‘sigaction’ (aka. ‘scm_sigaction_for_thread’) to run
> asyncs, which in turn call ‘scm_sigaction_for_thread’ for the very same
> thread, leading to a deadlock:

Fixed in 85520354a8f5de0366c4ac3eb5403aeb27c9515e.

Ludo’.