.
Thread 2 (Thread 0x7f1a38b186c0 (LWP 27373)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007f1a302681ce in ?? () from /usr/lib/firefox-trunk/libxul.so
No symbol table info available.
#2  0x00007f1a3026a755 in ?? () from /usr/lib/firefox-trunk/libxul.so
No symbol table info available.
#3  0x00007f1a3025007c in ?? () from /usr/lib/firefox-trunk/libxul.so
No symbol table info available.
#4  0x00007f1a3024e6f5 in ?? () from /usr/lib/firefox-trunk/libxul.so
No symbol table info available.
#5  0x00007f1a302567d0 in ?? () from /usr/lib/firefox-trunk/libxul.so
No symbol table info available.
#6  0x00007f1a3025400a in ?? () from /usr/lib/firefox-trunk/libxul.so
No symbol table info available.
#7  0x00007f1a3d697ada in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:444
        ret = <optimized out>
        pd = <optimized out>
        out = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139750676199408, 7122591900775344531, -200, 2, 140726314249408, 139750596771840, -7139059754604041837, -7139052813733205613}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#8  0x00007f1a3d72847c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
No locals.
.
Thread 1 (Thread 0x7f1a3dc86780 (LWP 27370)):
#0  0x00007f1a2fc0a906 in ?? () from /usr/lib/firefox-trunk/libxul.so
No symbol table info available.
#1  0x00007f1a302a4196 in ?? () from /usr/lib/firefox-trunk/libxul.so
No symbol table info available.
#2  0x00007f1a302a3ee1 in ?? () from /usr/lib/firefox-trunk/libxul.so
No symbol table info available.
#3  0x00007f1a323a769f in ?? () from /usr/lib/firefox-trunk/libxul.so
No symbol table info available.
#4  0x00007f1a33e607b5 in ?? () from /usr/lib/firefox-trunk/libxul.so
No symbol table info available.
#5  0x000055a9a105537d in ?? ()
No symbol table info available.
#6  0x00007f1a3d6280d0 in __libc_start_call_main (main=main@entry=0x55a9a1055090, argc=argc@entry=22, argv=argv@entry=0x7ffd65f8c428) at ../sysdeps/nptl/libc_start_call_main.h:58
        self = <optimized out>
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140726314255400, 7122591900777179539, 0, 140726314255584, 94187040112056, 139750683713536, -7124047645692532333, -7139052730248468077}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x7ffd65f8c428}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#7  0x00007f1a3d628189 in __libc_start_main_impl (main=0x55a9a1055090, argc=22, argv=0x7ffd65f8c428, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd65f8c418) at ../csu/libc-start.c:360
No locals.
#8  0x000055a9a1054f35 in _start ()
No symbol table info available.