backtrace

src/gc/api.c:248: failed assertion 'PObj_is_PMC_TEST(obj)'
Backtrace - Obtained 32 stack frames (max trace depth is 32).
0   libparrot.dylib                     0x0055c34d Parrot_do_check_events + 173
1   libparrot.dylib                     0x0055c4b7 Parrot_confess + 151
2   libparrot.dylib                     0x00569847 Parrot_gc_mark_PMC_alive_fun + 135
3   libparrot.dylib                     0x007005f5 Parrot_CodeString_get_isa + 1957
4   libparrot.dylib                     0x0056d59e Parrot_is_blocked_GC_sweep + 6398
5   libparrot.dylib                     0x00569967 Parrot_gc_mark_PObj_alive + 183
6   libparrot.dylib                     0x0056eb61 Parrot_is_blocked_GC_sweep + 11969
7   libparrot.dylib                     0x0056ec2e Parrot_is_blocked_GC_sweep + 12174
8   libparrot.dylib                     0x0056ecac Parrot_is_blocked_GC_sweep + 12300
9   libparrot.dylib                     0x0056d116 Parrot_is_blocked_GC_sweep + 5238
10  libparrot.dylib                     0x0056c2b3 Parrot_is_blocked_GC_sweep + 1555
11  libparrot.dylib                     0x0056c3f5 Parrot_is_blocked_GC_sweep + 1877
12  libparrot.dylib                     0x0056a883 Parrot_gc_mark_STRING_alive_fun + 3827
13  libparrot.dylib                     0x0056c688 Parrot_is_blocked_GC_sweep + 2536
14  libparrot.dylib                     0x0056c7f0 Parrot_is_blocked_GC_sweep + 2896
15  libparrot.dylib                     0x00569e9d Parrot_gc_mark_STRING_alive_fun + 1293
16  libparrot.dylib                     0x005d31f6 pmc_reuse + 566
17  libparrot.dylib                     0x005d3318 pmc_new + 232
18  libparrot.dylib                     0x0057a6ce Parrot_PCCINVOKE + 238
19  libparrot.dylib                     0x005c6230 Parrot_ComposeRole + 400
20  libparrot.dylib                     0x006f6ba3 Parrot_Capture_get_isa + 6355
21  libparrot.dylib                     0x004ffdbc Parrot_str_from_int + 142716
22  libparrot.dylib                     0x005d60d7 enable_event_checking + 1991
23  libparrot.dylib                     0x005d4fca Parrot_runcore_switch + 3978
24  libparrot.dylib                     0x0057d858 new_runloop_jump_point + 392
25  libparrot.dylib                     0x0057db86 new_runloop_jump_point + 1206
26  libparrot.dylib                     0x0057e345 Parrot_run_meth_fromc_args_reti + 213
27  libparrot.dylib                     0x0072135a Parrot_NameSpace_get_isa + 30186
28  libparrot.dylib                     0x004dddcd Parrot_str_from_int + 3469
29  libparrot.dylib                     0x005d60d7 enable_event_checking + 1991
30  libparrot.dylib                     0x005d4fca Parrot_runcore_switch + 3978
31  libparrot.dylib                     0x0057d858 new_runloop_jump_point + 392