0   libSystem.B.dylib             	0x974a9136 __semwait_signal_nocancel + 10
1   libSystem.B.dylib             	0x974a2013 usleep$NOCANCEL$UNIX2003 + 61
2   libSystem.B.dylib             	0x974b9685 abort + 85
3   libmono.0.dylib               	0x00981c5b mono_handle_native_sigsegv + 315 (mini-exceptions.c:1848)
4   libmono.0.dylib               	0x008d31b7 mono_sigsegv_signal_handler + 275 (mini.c:4800)
5   libSystem.B.dylib             	0x974392bb _sigtramp + 43
6   ???                           	0xffffffff 0 + 4294967295
7   ???                           	0x002d2f56 0 + 2961238
8   ???                           	0x03001eaa 0 + 50339498
9   ???                           	0x03001e13 0 + 50339347
10  ???                           	0x03000833 0 + 50333747
11  ???                           	0x030006d7 0 + 50333399
12  ???                           	0x037901dc 0 + 58261980
13  ???                           	0x189dd6ee 0 + 412997358