#0  0xb7ed2d2b in IA__g_logv (log_domain=<value optimized out>, log_level=G_LOG_LEVEL_ERROR, format=0xb7f1b990 "file %s: line %d (%s): assertion failed: (%s)", 
#1  0xb7ed2fa9 in IA__g_log (log_domain=0x0, log_level=G_LOG_LEVEL_ERROR, format=0xb7f1b990 "file %s: line %d (%s): assertion failed: (%s)")
#2  0xb7ed3026 in IA__g_assert_warning (log_domain=0x0, file=0x81df39d "marshal.c", line=2980, pretty_function=0x81e10ab "mono_marshal_find_in_cache", 
#3  0x080e4b0b in ?? ()
#4  0x00000000 in ?? ()