Comment 6 for bug 1747677

(gdb) info threads
  Id Target Id Frame
* 1 Thread 0x7f03d19509c0 (LWP 7204) "kicad" 0x00007f03cd00097b in poll () from /usr/lib/libc.so.6
  2 Thread 0x7f03c237a700 (LWP 7219) "gmain" 0x00007f03cd00097b in poll () from /usr/lib/libc.so.6
  3 Thread 0x7f03bb5a3700 (LWP 7221) "threaded-ml" 0x00007f03cd00097b in poll () from /usr/lib/libc.so.6
  4 Thread 0x7f0393f3d700 (LWP 7223) "kicad" futex_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h:44
  5 Thread 0x7f039373c700 (LWP 7224) "kicad" futex_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h:44
  6 Thread 0x7f0392f3b700 (LWP 7225) "kicad" futex_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h:44
(gdb) thread 2
[Switching to thread 2 (Thread 0x7f03c237a700 (LWP 7219))]
#0 0x00007f03cd00097b in poll () from /usr/lib/libc.so.6
(gdb) bt 10
#0 0x00007f03cd00097b in poll () at /usr/lib/libc.so.6
#1 0x00007f03cb952ff3 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007f03cb95310e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007f03cb953162 in () at /usr/lib/libglib-2.0.so.0
#4 0x00007f03cb97b26a in () at /usr/lib/libglib-2.0.so.0
#5 0x00007f03cd2d308c in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007f03cd00ae7f in clone () at /usr/lib/libc.so.6
(gdb) thread 3
[Switching to thread 3 (Thread 0x7f03bb5a3700 (LWP 7221))]
#0 0x00007f03cd00097b in poll () from /usr/lib/libc.so.6
(gdb) bt
#0 0x00007f03cd00097b in poll () at /usr/lib/libc.so.6
#1 0x00007f03c0e73773 in () at /usr/lib/libpulse.so.0
#2 0x00007f03c0e64bd0 in pa_mainloop_poll () at /usr/lib/libpulse.so.0
#3 0x00007f03c0e65271 in pa_mainloop_iterate () at /usr/lib/libpulse.so.0
#4 0x00007f03c0e65301 in pa_mainloop_run () at /usr/lib/libpulse.so.0
#5 0x00007f03c0e736ae in () at /usr/lib/libpulse.so.0
#6 0x00007f03c0c1281c in () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#7 0x00007f03cd2d308c in start_thread () at /usr/lib/libpthread.so.0
#8 0x00007f03cd00ae7f in clone () at /usr/lib/libc.so.6
(gdb) thread 4
[Switching to thread 4 (Thread 0x7f0393f3d700 (LWP 7223))]
#0 futex_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h:44
44 /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h: No such file or directory.
(gdb) bt
#0 0x00007f03cd719f0e in futex_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h:44
#1 0x00007f03cd719f0e in do_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/wait.h:67
#2 0x00007f03cd719f0e in gomp_barrier_wait_end (bar=0x56428c7c4f50, state=24) at /build/gcc/src/gcc/libgomp/config/linux/bar.c:48
#3 0x00007f03cd7178c8 in gomp_simple_barrier_wait (bar=<optimized out>) at /build/gcc/src/gcc/libgomp/config/posix/simple-bar.h:60
#4 0x00007f03cd7178c8 in gomp_thread_start (xdata=<optimized out>) at /build/gcc/src/gcc/libgomp/team.c:124
#5 0x00007f03cd2d308c in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007f03cd00ae7f in clone () at /usr/lib/libc.so.6
(gdb) thread 5
[Switching to thread 5 (Thread 0x7f039373c700 (LWP 7224))]
#0 futex_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h:44
44 in /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h
(gdb) bt
#0 0x00007f03cd719f0e in futex_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h:44
#1 0x00007f03cd719f0e in do_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/wait.h:67
#2 0x00007f03cd719f0e in gomp_barrier_wait_end (bar=0x56428c7c4f50, state=24) at /build/gcc/src/gcc/libgomp/config/linux/bar.c:48
#3 0x00007f03cd7178c8 in gomp_simple_barrier_wait (bar=<optimized out>) at /build/gcc/src/gcc/libgomp/config/posix/simple-bar.h:60
#4 0x00007f03cd7178c8 in gomp_thread_start (xdata=<optimized out>) at /build/gcc/src/gcc/libgomp/team.c:124
#5 0x00007f03cd2d308c in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007f03cd00ae7f in clone () at /usr/lib/libc.so.6
(gdb) thread 6
[Switching to thread 6 (Thread 0x7f0392f3b700 (LWP 7225))]
#0 futex_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h:44
44 in /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h
(gdb) bt
#0 0x00007f03cd719f0e in futex_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/x86/futex.h:44
#1 0x00007f03cd719f0e in do_wait (val=24, addr=0x56428c7c4f54) at /build/gcc/src/gcc/libgomp/config/linux/wait.h:67
#2 0x00007f03cd719f0e in gomp_barrier_wait_end (bar=0x56428c7c4f50, state=24) at /build/gcc/src/gcc/libgomp/config/linux/bar.c:48
#3 0x00007f03cd7178c8 in gomp_simple_barrier_wait (bar=<optimized out>) at /build/gcc/src/gcc/libgomp/config/posix/simple-bar.h:60
#4 0x00007f03cd7178c8 in gomp_thread_start (xdata=<optimized out>) at /build/gcc/src/gcc/libgomp/team.c:124
#5 0x00007f03cd2d308c in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007f03cd00ae7f in clone () at /usr/lib/libc.so.6