gdb of hanging syntax.t test

gistfile1.txt

dogbert@dogbert-VirtualBox ~/repos/rakudo $ sudo gdb -p 14938
[sudo] password for dogbert: 
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.3) 7.7.1
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Attaching to process 14938
Reading symbols from /home/dogbert/repos/rakudo/install/bin/moar...done.
Reading symbols from //home/dogbert/repos/rakudo/install/lib/libmoar.so...done.
Loaded symbols for //home/dogbert/repos/rakudo/install/lib/libmoar.so
Reading symbols from /lib/i386-linux-gnu/libc.so.6...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libc-2.19.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/libc.so.6
Reading symbols from /lib/i386-linux-gnu/libm.so.6...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libm-2.19.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/libm.so.6
Reading symbols from /lib/i386-linux-gnu/libpthread.so.0...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libpthread-2.19.so...done.
done.
[New LWP 14960]
[New LWP 14944]
[New LWP 14943]
[New LWP 14942]
[New LWP 14941]
[New LWP 14940]
[New LWP 14939]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
Loaded symbols for /lib/i386-linux-gnu/libpthread.so.0
Reading symbols from /lib/i386-linux-gnu/librt.so.1...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/librt-2.19.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/librt.so.1
Reading symbols from /lib/i386-linux-gnu/libdl.so.2...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libdl-2.19.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/libdl.so.2
Reading symbols from /lib/ld-linux.so.2...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/ld-2.19.so...done.
done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from ./dynext/libperl6_ops_moar.so...done.
Loaded symbols for ./dynext/libperl6_ops_moar.so
0xb77d6cb0 in ?? ()
(gdb) info threads
  Id   Target Id         Frame 
  8    Thread 0xb6850b40 (LWP 14939) "moar" 0xb77d6cb0 in ?? ()
  7    Thread 0xb2f6bb40 (LWP 14940) "moar" 0xb77d6cb0 in ?? ()
  6    Thread 0xb21feb40 (LWP 14941) "moar" 0xb77d6cb0 in ?? ()
  5    Thread 0xb13feb40 (LWP 14942) "moar" 0xb73bde85 in MVM_gc_root_add_frame_roots_to_worklist (tc=0xb26a6c08, worklist=0xa8ccf050, cur_frame=0x9d699e20) at src/gc/roots.c:366
  4    Thread 0xb05feb40 (LWP 14943) "moar" 0xb77d6cb0 in ?? ()
  3    Thread 0xaf7feb40 (LWP 14944) "moar" 0xb77d6cb0 in ?? ()
  2    Thread 0x761feb40 (LWP 14960) "moar" 0xb77d6cb0 in ?? ()
* 1    Thread 0xb7074700 (LWP 14938) "moar" 0xb77d6cb0 in ?? ()
(gdb) t 5
[Switching to thread 5 (Thread 0xb13feb40 (LWP 14942))]
#0  0xb73bde85 in MVM_gc_root_add_frame_roots_to_worklist (tc=0xb26a6c08, worklist=0xa8ccf050, cur_frame=0x9d699e20) at src/gc/roots.c:366
366	    MVM_gc_worklist_add(tc, worklist, &cur_frame->static_info);
(gdb) bt
#0  0xb73bde85 in MVM_gc_root_add_frame_roots_to_worklist (tc=0xb26a6c08, worklist=0xa8ccf050, cur_frame=0x9d699e20) at src/gc/roots.c:366
#1  0xb73c0ffa in MVM_gc_mark_collectable (tc=0xb26a6c08, worklist=0xa8ccf050, new_addr=0x9d699e20) at src/gc/collect.c:384
#2  0xb73bd80b in MVM_gc_root_add_gen2s_to_worklist (tc=0xb26a6c08, worklist=0xa8ccf050) at src/gc/roots.c:299
#3  0xb73bf372 in MVM_gc_collect (tc=0xb26a6c08, what_to_do=0 '\000', gen=0 '\000') at src/gc/collect.c:127
#4  0xb73b94a9 in run_gc (tc=0xb26a6c08, what_to_do=0 '\000') at src/gc/orchestrate.c:359
#5  0xb73b98a0 in MVM_gc_enter_from_allocator (tc=0xb26a6c08) at src/gc/orchestrate.c:472
#6  0xb73b9c5e in MVM_gc_allocate_nursery (tc=0xb26a6c08, size=112) at src/gc/allocation.c:32
#7  0xb73b9b73 in MVM_gc_allocate (tc=0xb26a6c08, size=112) at src/gc/allocation.h:13
#8  0xb73b9cc6 in MVM_gc_allocate_zeroed (tc=0xb26a6c08, size=112) at src/gc/allocation.c:49
#9  0xb73ba0cb in MVM_gc_allocate_frame (tc=0xb26a6c08) at src/gc/allocation.c:99
#10 0xb7396ae3 in MVM_frame_move_to_heap (tc=0xb26a6c08, frame=0xb26a7d30) at src/core/frame.c:624
#11 0xb7394def in MVM_frame_force_to_heap (tc=0xb26a6c08, frame=0xb26a7d30) at src/core/frame.h:193
#12 0xb7395bcd in allocate_frame (tc=0xb26a6c08, static_frame=0x9b5d678, spesh_cand=0xb5e6d5a8, heap=1) at src/core/frame.c:241
#13 0xb73964eb in MVM_frame_invoke (tc=0xb26a6c08, static_frame=0x9b5d678, callsite=0xb77797f8 <inv_arg_callsite>, args=0x82c9bdf0, outer=0xb4464058, code_ref=0x9c4ab38, spesh_cand=0) at src/core/frame.c:484
#14 0xb738cb4d in MVM_interp_run (tc=0xb26a6c08, initial_invoke=0xb739fd3d <thread_initial_invoke>, invoke_data=0xb26a68d0) at src/core/interp.c:5438
#15 0xb739fe5d in start_thread (data=0xb26a68d0) at src/core/threads.c:83
#16 0xb708af72 in start_thread (arg=0xb13feb40) at pthread_create.c:312
#17 0xb71d53ee in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129
(gdb) q