Почему lightspark крашится, если собрать с pulseaudio?

Система amd64. lightspark работает но, но звука нет, если собрать с pulseaudio видео почему-то вначале загрузки сильно искажается и крашится браузер.

INFO: SECURITY: DISALLOWED: No policy file explicitly allowed access
[flv @ 0x7f20fd35d000] Estimating duration from bitrate, this may be inaccurate
INFO: VIDEO DEC: Video frame size 640x368
INFO: AUDIO DEC: Audio sample rate 44100
INFO: AUDIO DEC: Audio channels 2
INFO: AUDIO DEC: Audio sample rate 44100
INFO: AUDIO DEC: Audio channels 2
INFO: AUDIO DEC: Audio sample rate 44100
INFO: AUDIO DEC: Audio channels 2
INFO: AUDIO DEC: Initial timestamp 0
INFO: FPS: 12
ERROR: AUDIO BACKEND: Connection to PulseAudio server failed
Assertion '!m->thread || !pa_thread_is_running(m->thread) || !in_worker(m)' failed at pulse/thread-mainloop.c:175, function pa_threaded_mainloop_lock(). Aborting.
/usr/lib64/icecat/run-icecat.sh: line 131: 2764 Aborted "$prog" ${1+"$@"}
[{WIFEXITED(s) && WEXITSTATUS(s) == 134}], 0, NULL) = 2760
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
--- SIGCHLD (Child exited) @ 0 (0) ---
wait4(-1, 0x7fff39073adc, WNOHANG, NULL) = -1 ECHILD (No child processes)
rt_sigreturn(0xffffffffffffffff) = 0
rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER, 0x7f4594b074d0}, {0x43fa30, [], SA_RESTORER, 0x7f4594b074d0}, 8) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
read(255, "exitcode=$?\n\nexit $exitcode\n# EO"..., 3935) = 35
rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
exit_group(134)