(gdb) bt
#0  0x9004308c in kill ()
#1  0x9009fb3c in abort ()
#2  0x00040c70 in ?? ()
#3  0x00041130 in ?? ()
#4  0x00026578 in ?? ()
#5  0x00027714 in ?? ()
#6  0x00029dec in ?? ()
#7  0x0002a3dc in ?? ()
#8  0x0002aca8 in ?? ()
#9  0x00042c4c in ?? ()
#10 0x00021c68 in ?? ()
#11 0x00021fac in ?? ()
#12 0x000055b4 in ?? ()
#13 0x00004150 in ?? ()
#14 0x00002010 in ?? ()
#15 0x8fe1a31c in __dyld__dyld_start ()