On Sat, Sep 05, 2020 at 03:18:21AM +0200, Klemens Nanni wrote:
> Latest mpv on snapshots on my X250 dumps core whenever I quit playing
> with `q' or `Q';  I have no mpv config and this happens regardless of
> any values for the vm.malloc_conf and hw.smt sysctls:
> 
>       $ sysctl -n kern.version
>       OpenBSD 6.8-beta (GENERIC.MP) #55: Tue Sep  1 01:01:32 MDT 2020
>           dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
> 
>       $ pkg_info -m | grep mpv
>       mpv-0.32.0          movie player based on MPlayer/mplayer2
> 
>       $ rm -r ~/.config/mpv/
>       rm: /home/kn/.config/mpv: No such file or directory
>       $ mpv http://url/some.mkv
>        mpv `xclip -o`  
>        Resuming playback. This behavior can be disabled with 
> --no-resume-playback.
>         (+) Video --vid=1 (*) (h264 1904x1068 23.976fps)
>          (+) Audio --aid=1 --alang=eng (*) (aac 2ch 48000Hz)
>        AO: [sdl] 48000Hz stereo 2ch s32
>        VO: [gpu] 1904x1068 yuv420p
> 
> 
>        Exiting... (Quit)
>        pthread_mutex_destroy on mutex with waiters!
>        Segmentation fault (core dumped) 
> 
> The pthread_mutex_destroy line has always been there but dumping core
> is new behaviour, it most certainly started after upgrading to a newer
> snapshot around one or two weeks ago and/or moving my installation/SSD
> from an X230 to an X250 thinkpad (same config, just hardware swap).
> 
>       $ egdb --quiet -se `which mpv` -c ./mpv.core -batch -ex bt -ex l 
>       [New process 256621]
>       [New process 165240]
>       [New process 528996]
>       [New process 170944]
>       Core was generated by `mpv'.
>       Program terminated with signal SIGSEGV, Segmentation fault.
>       #0  0x000007e975d313e0 in ?? ()
>       [Current thread is 1 (process 256621)]
>       #0  0x000007e975d313e0 in ?? ()
>       #1  0x000007e8a562a505 in _rthread_tls_destructors 
> (thread=0x7e8785bdc40) at /usr/src/lib/libc/thread/rthread_tls.c:182
>       #2  0x000007e8a5693ac3 in _libc_pthread_exit (retval=<optimized out>) 
> at /usr/src/lib/libc/thread/rthread.c:150
>       #3  0x000007e902c2d1d9 in _rthread_start (v=<optimized out>) at 
> /usr/src/lib/librthread/rthread.c:97
>       #4  0x000007e8a56505a8 in __tfork_thread () at 
> /usr/src/lib/libc/arch/amd64/sys/tfork_thread.S:77
>       #5  0x0000000000000000 in ?? ()
>       1       #include "main-fn.h"
>       2       
>       3       int main(int argc, char *argv[])
>       4       {
>       5           return mpv_main(argc, argv);
>       6       }
> 
> Now idea what's happening here.
> Can someone else reproduce?

For the archives:  this regression was fixed.  Not sure if the
libc/phtread/emutls changes or the mpv 0.34.0 update did it, but there
are no segfaults on quit anymore!

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