(gdb) run
Starting program: /usr/bin/perl ./play2.t
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffc9dca700 (LWP 7239)]
callback called 

Thread 2 "mpv/mpv core" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc9dca700 (LWP 7239)]
0x00007ffff6ab126d in callp (string=0x5555559756b0) at Simple.xs:30
30          dMY_CXT;
(gdb) break Simple.xs:27
Haltepunkt 1 at 0x7ffff6ab1255: file Simple.xs, line 27.
(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) x
Please answer y or n.
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /usr/bin/perl ./play2.t
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffc9dca700 (LWP 7241)]

Thread 1 "perl" hit Breakpoint 1, callp (string=0x5555559756b0) at Simple.xs:29
29          dTHX;
(gdb) s
__GI___pthread_getspecific (key=0) at pthread_getspecific.c:30
30      pthread_getspecific.c: Datei oder Verzeichnis nicht gefunden.
(gdb) s
31      in pthread_getspecific.c
(gdb) s
55      in pthread_getspecific.c
(gdb) s
56      in pthread_getspecific.c
(gdb) s
60      in pthread_getspecific.c
(gdb) s
65      in pthread_getspecific.c
(gdb) s
callp (string=0x5555559756b0) at Simple.xs:30
30          dMY_CXT;
(gdb) s
31          dSP;
(gdb) s
33          ENTER; SAVETMPS; 
(gdb) s
34          PUSHMARK(SP);
(gdb) s
36          PUTBACK;
(gdb) s
38          perl_call_sv(MY_CXT.callback,G_DISCARD|G_NOARGS);
(gdb) s
callback called 
39          SPAGAIN;
(gdb) s
41          PUTBACK;FREETMPS;LEAVE;
(gdb) s
43      }
(gdb) s
0x00007ffff67708aa in mpv_set_wakeup_callback () from /usr/lib/x86_64-linux-gnu/libmpv.so.1
(gdb) s
Single stepping until exit from function mpv_set_wakeup_callback,
which has no line number information.
__GI___pthread_mutex_unlock (mutex=0x7fffc4018a08) at pthread_mutex_unlock.c:345
345     pthread_mutex_unlock.c: Datei oder Verzeichnis nicht gefunden.
(gdb) s
__pthread_mutex_unlock_usercnt (decr=1, mutex=0x7fffc4018a08) at pthread_mutex_unlock.c:344
344     in pthread_mutex_unlock.c
(gdb) s
345     in pthread_mutex_unlock.c
(gdb) s
__pthread_mutex_unlock_usercnt (decr=1, mutex=0x7fffc4018a08) at pthread_mutex_unlock.c:38
38      in pthread_mutex_unlock.c
(gdb) s
39      in pthread_mutex_unlock.c
(gdb) s
38      in pthread_mutex_unlock.c
(gdb) s
39      in pthread_mutex_unlock.c
(gdb) s
43      in pthread_mutex_unlock.c
(gdb) s
48      in pthread_mutex_unlock.c
(gdb) s
51      in pthread_mutex_unlock.c
(gdb) s
54      in pthread_mutex_unlock.c
(gdb) s
56      in pthread_mutex_unlock.c
(gdb) s
__GI___pthread_mutex_unlock (mutex=0x7fffc4018a08) at pthread_mutex_unlock.c:346
346     in pthread_mutex_unlock.c
(gdb) s
XS_MPV__Simple__xs_set_wakeup_callback (my_perl=0x555555953260, cv=0x555555aae830) at Simple.c:524
524         XSRETURN_EMPTY;
(gdb) s
525     }
(gdb) s
0x0000555555630201 in Perl_pp_entersub ()
(gdb) s
Single stepping until exit from function Perl_pp_entersub,
which has no line number information.
0x0000555555628026 in Perl_runops_standard ()
(gdb) s
Single stepping until exit from function Perl_runops_standard,
which has no line number information.
[Switching to Thread 0x7fffc9dca700 (LWP 7241)]

Thread 2 "mpv/mpv core" hit Breakpoint 1, callp (string=0x5555559756b0) at Simple.xs:29
29          dTHX;
(gdb) s
__GI___pthread_getspecific (key=0) at pthread_getspecific.c:30
30      pthread_getspecific.c: Datei oder Verzeichnis nicht gefunden.
(gdb) s
31      in pthread_getspecific.c
(gdb) s
55      in pthread_getspecific.c
(gdb) s
56      in pthread_getspecific.c
(gdb) s
65      in pthread_getspecific.c
(gdb) s
callp (string=0x5555559756b0) at Simple.xs:30
30          dMY_CXT;
(gdb) s

Thread 2 "mpv/mpv core" received signal SIGSEGV, Segmentation fault.
0x00007ffff6ab126d in callp (string=0x5555559756b0) at Simple.xs:30
30          dMY_CXT;