#0  0x00007f20f27c8a8b in raise (sig=11) at ../nptl/sysdeps/unix/sysv/linux/pt-raise.c:38
        resultvar = 0
        pid = <optimized out>
#1  0x00007f20ee07ecaa in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#2  <signal handler called>
No locales.
#3  0x00007f20ef35bfce in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#4  0x00007f20ef41ad30 in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#5  0x00007f20ef35f5e3 in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#6  0x00007f20ef422db9 in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#7  0x00007f20ef42d731 in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#8  0x00007f20ef42dd73 in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#9  0x00007f20ef42e19b in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#10 0x00007f20ee6ae6d8 in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#11 0x00007f20eee5a5ca in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#12 0x00007f20eee5a685 in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#13 0x00007f20eee57f8a in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#14 0x00007f20eee2ab2e in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#15 0x00007f20eeb4b99b in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#16 0x00007f20eee7c23b in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#17 0x00007f20eead7d6d in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#18 0x00007f20ee9a5215 in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#19 0x00007f20ee079d37 in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#20 0x00007f20ee079faf in ?? () from /usr/lib/firefox/libxul.so
No symbol table info available.
#21 0x00007f20ee07a20b in XRE_main () from /usr/lib/firefox/libxul.so
No symbol table info available.
#22 0x00007f20f340af94 in _start ()
No symbol table info available.