.
Thread 4 (LWP 3130):
#0  0x00007fbeeaa2f089 in futex_abstimed_wait (cancel=true, private=<optimized out>, abstime=0x0, expected=0, futex=0x1458080) at sem_waitcommon.c:42
        __ret = -512
        err = <optimized out>
        oldtype = 0
#1  do_futex_wait (sem=sem@entry=0x1458080, abstime=0x0) at sem_waitcommon.c:208
No locals.
#2  0x00007fbeeaa2f124 in __new_sem_wait_slow (sem=0x1458080, abstime=0x0) at sem_waitcommon.c:277
        _buffer = {__routine = 0x7fbeeaa2f050 <__sem_wait_cleanup>, __arg = 0x1458080, __canceltype = 848325633, __prev = 0x0}
        err = <optimized out>
        d = 0
#3  0x00007fbeeaa2f1ca in __new_sem_wait (sem=<optimized out>) at sem_wait.c:28
No locals.
#4  0x00007fbeeb538ff2 in pa_semaphore_wait () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-7.1.so
No symbol table info available.
#5  0x00007fbeeb77869b in pa_asyncmsgq_send () from /tmp/apport_sandbox_PORQSw/usr/lib/libpulsecore-7.1.so
No symbol table info available.
#6  0x00007fbeeb7caf97 in pa_source_set_volume () from /tmp/apport_sandbox_PORQSw/usr/lib/libpulsecore-7.1.so
No symbol table info available.
#7  0x00007fbee57494bd in command_set_volume () from /tmp/apport_sandbox_PORQSw/usr/lib/pulse-7.1/modules/libprotocol-native.so
No symbol table info available.
#8  0x00007fbeeb523162 in pa_pdispatch_run () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-7.1.so
No symbol table info available.
#9  0x00007fbee574ea55 in pstream_packet_callback () from /tmp/apport_sandbox_PORQSw/usr/lib/pulse-7.1/modules/libprotocol-native.so
No symbol table info available.
#10 0x00007fbeeb525a7f in do_read () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-7.1.so
No symbol table info available.
#11 0x00007fbeeb5280fb in do_pstream_read_write () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-7.1.so
No symbol table info available.
#12 0x00007fbeeb5284a9 in srb_callback () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-7.1.so
No symbol table info available.
#13 0x00007fbeeb528d3a in srbchannel_rwloop () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-7.1.so
No symbol table info available.
#14 0x00007fbeeb2bde87 in pa_mainloop_dispatch () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#15 0x00007fbeeb2be28c in pa_mainloop_iterate () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#16 0x00007fbeeb2be330 in pa_mainloop_run () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#17 0x0000000000406f95 in main ()
No symbol table info available.
.
Thread 3 (LWP 3143):
#0  0x00007fbeea03d901 in __GI_ppoll (fds=0x15c6aa0, nfds=4, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:56
        resultvar = 18446744073709551102
        oldtype = 0
        tval = {tv_sec = 0, tv_nsec = 119729035}
        result = <optimized out>
#1  0x00007fbeeb7976a7 in pa_rtpoll_run () from /tmp/apport_sandbox_PORQSw/usr/lib/libpulsecore-7.1.so
No symbol table info available.
#2  0x00007fbee45e5246 in thread_func () from /tmp/apport_sandbox_PORQSw/usr/lib/pulse-7.1/modules/libalsa-util.so
No symbol table info available.
#3  0x00007fbeeb538d98 in internal_thread_func () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-7.1.so
No symbol table info available.
#4  0x00007fbeeaa2766a in start_thread (arg=0x7fbed7ffd700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7fbed7ffd700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140457644381952, -7118772795669074882, 0, 140723755124959, 140457644382656, 1, 7082093089446046782, 7082152989920865342}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#5  0x00007fbeea048e4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.
.
Thread 2 (LWP 3142):
#0  0x00007fbeea03d901 in __GI_ppoll (fds=0x146a6a0, nfds=2, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:56
        resultvar = 18446744073709551102
        oldtype = 0
        tval = {tv_sec = 21431248, tv_nsec = 140457970998183}
        result = <optimized out>
#1  0x00007fbeeb7976a7 in pa_rtpoll_run () from /tmp/apport_sandbox_PORQSw/usr/lib/libpulsecore-7.1.so
No symbol table info available.
#2  0x00007fbee45e53b2 in thread_func () from /tmp/apport_sandbox_PORQSw/usr/lib/pulse-7.1/modules/libalsa-util.so
No symbol table info available.
#3  0x00007fbeeb538d98 in internal_thread_func () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-7.1.so
No symbol table info available.
#4  0x00007fbeeaa2766a in start_thread (arg=0x7fbee6362700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7fbee6362700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140457882822400, -7118772795669074882, 0, 140723755124959, 8388608, 21040000, 7082127807277313086, 7082152989920865342}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#5  0x00007fbeea048e4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.
.
Thread 1 (LWP 3144):
#0  0x00007fbee9f77227 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
        resultvar = 0
        pid = 3130
        selftid = 3144
#1  0x00007fbee9f78e8a in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x7fbed77fb1ba, sa_sigaction = 0x7fbed77fb1ba}, sa_mask = {__val = {140457635983120, 3905804158464143792, 140457635983152, 140457635983986, 140457635983152, 140457635983952, 140457968664258, 140457635983552, 1, 34, 140457946744070, 140458242965505, 140457968426058, 140457968664144, 632, 140457968665632}}, sa_flags = -463615274, sa_restorer = 0x7fbee45f4278}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007fbee45dcadf in pa_alsa_path_set_volume () from /tmp/apport_sandbox_PORQSw/usr/lib/pulse-7.1/modules/libalsa-util.so
No symbol table info available.
#3  0x00007fbee45e99a5 in source_set_volume_cb () from /tmp/apport_sandbox_PORQSw/usr/lib/pulse-7.1/modules/libalsa-util.so
No symbol table info available.
#4  0x00007fbeeb7cc113 in pa_source_process_msg () from /tmp/apport_sandbox_PORQSw/usr/lib/libpulsecore-7.1.so
No symbol table info available.
#5  0x00007fbee45eab1b in source_process_msg () from /tmp/apport_sandbox_PORQSw/usr/lib/pulse-7.1/modules/libalsa-util.so
No symbol table info available.
#6  0x00007fbeeb7c0c6b in set_shared_volume_within_thread () from /tmp/apport_sandbox_PORQSw/usr/lib/libpulsecore-7.1.so
No symbol table info available.
#7  0x00007fbeeb7cc0f9 in pa_source_process_msg () from /tmp/apport_sandbox_PORQSw/usr/lib/libpulsecore-7.1.so
No symbol table info available.
#8  0x00007fbee45eab1b in source_process_msg () from /tmp/apport_sandbox_PORQSw/usr/lib/pulse-7.1/modules/libalsa-util.so
No symbol table info available.
#9  0x00007fbeeb796bf5 in asyncmsgq_read_work () from /tmp/apport_sandbox_PORQSw/usr/lib/libpulsecore-7.1.so
No symbol table info available.
#10 0x00007fbeeb797549 in pa_rtpoll_run () from /tmp/apport_sandbox_PORQSw/usr/lib/libpulsecore-7.1.so
No symbol table info available.
#11 0x00007fbee45eb8ea in thread_func () from /tmp/apport_sandbox_PORQSw/usr/lib/pulse-7.1/modules/libalsa-util.so
No symbol table info available.
#12 0x00007fbeeb538d98 in internal_thread_func () from /tmp/apport_sandbox_PORQSw/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-7.1.so
No symbol table info available.
#13 0x00007fbeeaa2766a in start_thread (arg=0x7fbed77fc700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7fbed77fc700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140457635989248, -7118772795669074882, 0, 140723755124975, 140457635989952, 1, 7082094189494545470, 7082152989920865342}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#14 0x00007fbeea048e4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.