.
Thread 6 (LWP 3379):
#0  0x00007f3451b8d83d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f345280a33c in ?? ()
No symbol table info available.
#2  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 5 (LWP 3378):
#0  0x00007f3451b8d83d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f345280a33c in ?? ()
No symbol table info available.
#2  0x0000000000000020 in ?? ()
No symbol table info available.
#3  0x00000001008bad20 in ?? ()
No symbol table info available.
#4  0xffffffff7fffffff in ?? ()
No symbol table info available.
#5  0x246be4a183f3c400 in ?? ()
No symbol table info available.
#6  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 4 (LWP 21458):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007f345284ed0a in ?? ()
No symbol table info available.
#2  0x0000000000000668 in ?? ()
No symbol table info available.
#3  0x000000001f90c911 in ?? ()
No symbol table info available.
#4  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (LWP 21450):
#0  0x00007f3451b8d83d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f342492b5c1 in poll_func () from /tmp/apport_sandbox_XM_L74/usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#2  0x00007f342491cbe1 in pa_mainloop_poll () from /tmp/apport_sandbox_XM_L74/usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#3  0x00007f342491d27e in pa_mainloop_iterate () from /tmp/apport_sandbox_XM_L74/usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#4  0x00007f342491d330 in pa_mainloop_run () from /tmp/apport_sandbox_XM_L74/usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#5  0x00007f342492b556 in thread () from /tmp/apport_sandbox_XM_L74/usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#6  0x00007f34244c2d98 in internal_thread_func () from /tmp/apport_sandbox_XM_L74/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-7.1.so
No symbol table info available.
#7  0x00007f3451e6366a in start_thread (arg=0x7f3427428700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f3427428700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139861973698304, -6020138565701974905, 0, 140732647499695, 8388608, 12159344, 5916715448408491143, 5916753624317183111}, 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"
#8  0x00007f3451b98e4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.
.
Thread 2 (LWP 3377):
#0  0x00007f3451b8d83d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f345280a33c in ?? ()
No symbol table info available.
#2  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (LWP 3352):
#0  0x00007f3452dd5681 in ?? ()
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.