.
Thread 1 (process 7961):
#0  0x00007f9b3fba469b in raise () from /lib/libpthread.so.0
#1  0x00007f9b3d3614b2 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#2  <signal handler called>
#3  0x00007f9b3dab7972 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#4  0x00007f9b3d554726 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#5  0x00007f9b3d554800 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#6  0x00007f9b3d554859 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#7  0x00007f9b3d554add in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#8  0x00007f9b3d548826 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#9  0x00007f9b3dab7c59 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#10 0x00007f9b3d558213 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#11 0x00007f9b3d558012 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#12 0x00007f9b3d557a19 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#13 0x00007f9b3d53dbf5 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#14 0x00007f9b3dab61f7 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#15 0x00007f9b3d53a907 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#16 0x00007f9b3d53a13b in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#17 0x00007f9b3d5e397c in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#18 0x00007f9b3d67ea90 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#19 0x00007f9b3d601b8a in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#20 0x00007f9b3d5df2a2 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#21 0x00007f9b3dabc247 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#22 0x00007f9b3daf0c70 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#23 0x00007f9b3daf0cc6 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#24 0x00007f9b3d3662e5 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#25 0x00007f9b3e9ab9c7 in js_GC (cx=0x4403ee0, gckind=GC_NORMAL) at jsgc.c:3540
	savedWeakRoots = {newborn = {0x1, 0xff0a000000000000, 0x7f9b2c69c0f0, 0x22, 0x7f9b2c69c0f0, 
    0x7f9b3e997fac, 0x770478, 0x3ffb36f0, 0x4403ee0, 0x7f9b3e997ae6, 0x0, 0x770470, 0x0, 0x7f9b3e34ec2c, 
    0x770470}, lastAtom = 140304740314484, lastInternalResult = 7799920}
	tvr = {down = 0x770660, count = 7800416, u = {value = 140734401115328, object = 0x7fff47fc74c0, 
    string = 0x7fff47fc74c0, function = 0x7fff47fc74c0, xml = 0x7fff47fc74c0, qname = 0x7fff47fc74c0, 
    trace = 0x7fff47fc74c0, sprop = 0x7fff47fc74c0, weakRoots = 0x7fff47fc74c0, 
    parseContext = 0x7fff47fc74c0, script = 0x7fff47fc74c0, array = 0x7fff47fc74c0}}
	rt = (JSRuntime *) 0x770810
	keepAtoms = 0
	callback = (JSGCCallback) 0x7f9b3d36624c
	i = <value optimized out>
	type = <value optimized out>
	trc = {context = 0x4403ee0, callback = 0}
	thingSize = 96
	a = <value optimized out>
	ap = <value optimized out>
	emptyArenas = (JSGCArenaInfo *) 0x0
	flags = <value optimized out>
	flagp = (uint8 *) 0x7fff47fc7458 ""
	thing = <value optimized out>
	freeList = (JSGCThing *) 0x810000
	arenaList = (JSGCArenaList *) 0x770900
	allClear = 0
	requestDebit = 1
	acx = (JSContext *) 0x7fff47fc7458
	iter = (JSContext *) 0x0
#26 0x00007f9b3d364987 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#27 0x00007f9b3daf16fc in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#28 0x00007f9b3daf17e4 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#29 0x00007f9b3dabfe56 in NS_ShutdownXPCOM_P () from /usr/lib/xulrunner-1.9b5/libxul.so
#30 0x00007f9b3d358cdb in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#31 0x00007f9b3d35b189 in XRE_main () from /usr/lib/xulrunner-1.9b5/libxul.so
#32 0x00000000004014f7 in ?? ()
#33 0x00007f9b3eeb41c4 in __libc_start_main () from /lib/libc.so.6
#34 0x00000000004010f9 in ?? ()
#35 0x00007fff47fd09d8 in ?? ()
#36 0x0000000000000000 in ?? ()