Panic

gistfile1.txt

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[Switching to Thread 0x7fffee60c700 (LWP 430557)]

Thread 6 "async io thread" hit Breakpoint 1, MVM_panic (exitCode=exitCode@entry=1, messageFormat=messageFormat@entry=0x7ffff7a6ad70 "non-AsyncTask fetched from eventloop active work list") at src/core/exceptions.c:853
853	MVM_NO_RETURN void MVM_panic(MVMint32 exitCode, const char *messageFormat, ...) {
(gdb) bt
#0  MVM_panic (exitCode=exitCode@entry=1, messageFormat=messageFormat@entry=0x7ffff7a6ad70 "non-AsyncTask fetched from eventloop active work list") at src/core/exceptions.c:853
#1  0x00007ffff793d692 in MVM_io_eventloop_get_active_work (tc=tc@entry=0x7fffe810ccb0, work_idx=1) at src/io/eventloop.c:240
#2  0x00007ffff7944670 in cancel (loop=<optimized out>, async_task=<optimized out>, data=0x7fffe839b100, tc=0x7fffe810ccb0) at src/io/timers.c:50
#3  cancel (tc=0x7fffe810ccb0, loop=<optimized out>, async_task=<optimized out>, data=0x7fffe839b100) at src/io/timers.c:45
#4  0x00007ffff793cc58 in cancel_work (tc=0x7fffe810ccb0) at src/io/eventloop.c:56
#5  async_handler (handle=<optimized out>) at src/io/eventloop.c:78
#6  0x00007ffff7a49cc6 in uv.async_io () from //home/dogbert/repos/rakudo/nqp/MoarVM/../../install/lib/libmoar.so
#7  0x00007ffff7a44aa3 in uv.io_poll () from //home/dogbert/repos/rakudo/nqp/MoarVM/../../install/lib/libmoar.so
#8  0x00007ffff7a4a4da in uv_run () from //home/dogbert/repos/rakudo/nqp/MoarVM/../../install/lib/libmoar.so
#9  0x00007ffff7913eb5 in thread_initial_invoke (tc=0x7fffe810ccb0, data=<optimized out>) at src/core/threads.c:58
#10 0x00007ffff78cde10 in MVM_interp_run (tc=0x1, tc@entry=0x7fffe810ccb0, initial_invoke=0x7ffff7a6ad70, initial_invoke@entry=0x7ffff7913e70 <thread_initial_invoke>, invoke_data=0x7ffff7a6ad70, invoke_data@entry=0x7ffff7913e70 <thread_initial_invoke>, outer_runloop=outer_runloop@entry=0x0) at src/core/interp.c:158
#11 0x00007ffff7913f4d in start_thread (data=0x7fffe8130020) at src/core/threads.c:91
#12 0x00007ffff735e609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#13 0x00007ffff75e9293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb) l
848	 * unrecoverable, and a thread context is either not available or stands a
849	 * good chance of being too corrupt to print (or is not relevant information).
850	 * Use MVM_oops in the case a thread context is available.
851	 * TODO: Some hook for embedders.
852	 */
853	MVM_NO_RETURN void MVM_panic(MVMint32 exitCode, const char *messageFormat, ...) {
854	    va_list args;
855	    fputs("MoarVM panic: ", stderr);
856	    va_start(args, messageFormat);
857	    vfprintf(stderr, messageFormat, args);
(gdb) f 1
#1  0x00007ffff793d692 in MVM_io_eventloop_get_active_work (tc=tc@entry=0x7fffe810ccb0, work_idx=1) at src/io/eventloop.c:240
240	            MVM_panic(1, "non-AsyncTask fetched from eventloop active work list");
(gdb) l
235	/* Gets an active work item from the active work eventloop. */
236	MVMAsyncTask * MVM_io_eventloop_get_active_work(MVMThreadContext *tc, int work_idx) {
237	    if (work_idx >= 0 && work_idx < (int)MVM_repr_elems(tc, tc->instance->event_loop_active)) {
238	        MVMObject *task_obj = MVM_repr_at_pos_o(tc, tc->instance->event_loop_active, work_idx);
239	        if (REPR(task_obj)->ID != MVM_REPR_ID_MVMAsyncTask)
240	            MVM_panic(1, "non-AsyncTask fetched from eventloop active work list");
241	        MVM_ASSERT_NOT_FROMSPACE(tc, task_obj);
242	        return (MVMAsyncTask *)task_obj;
243	    }
244	    else {
(gdb) p REPR(task_obj)->ID
value has been optimized out
(gdb) p ((MVMArray*)(tc->instance->event_loop_active))->body.slots.o[1]
$1 = (MVMObject *) 0x0
(gdb) p work_idx
$2 = 1
(gdb) p (int)MVM_repr_elems(tc, tc->instance->event_loop_active)
$3 = 4
(gdb) info threads
  Id   Target Id                                            Frame 
  1    Thread 0x7ffff734e440 (LWP 430552) "moar"            futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5555585fce48) at ../sysdeps/nptl/futex-internal.h:183
  2    Thread 0x7ffff730a700 (LWP 430553) "spesh optimizer" futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5555555f1c00) at ../sysdeps/nptl/futex-internal.h:183
  3    Thread 0x7fffefe0f700 (LWP 430554) "moar"            futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555555559380) at ../sysdeps/nptl/futex-internal.h:183
  4    Thread 0x7fffef60e700 (LWP 430555) "moar"            futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555555559420) at ../sysdeps/nptl/futex-internal.h:183
  5    Thread 0x7fffeee0d700 (LWP 430556) "moar"            futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555555559380) at ../sysdeps/nptl/futex-internal.h:183
* 6    Thread 0x7fffee60c700 (LWP 430557) "async io thread" MVM_panic (exitCode=exitCode@entry=1, messageFormat=messageFormat@entry=0x7ffff7a6ad70 "non-AsyncTask fetched from eventloop active work list") at src/core/exceptions.c:853
  7    Thread 0x7fffede0b700 (LWP 430558) "moar"            futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555555559380) at ../sysdeps/nptl/futex-internal.h:183
  8    Thread 0x7fffed60a700 (LWP 430559) "moar"            futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555555559380) at ../sysdeps/nptl/futex-internal.h:183
  9    Thread 0x7fffece05700 (LWP 430560) "moar"            futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555555559380) at ../sysdeps/nptl/futex-internal.h:183
  10   Thread 0x7fffcffff700 (LWP 430561) "moar"            futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5555555f49bc) at ../sysdeps/nptl/futex-internal.h:183
(gdb)