Ah. this appears to be the same stack trace already noted by: Mitchell N Charity

On Thursday, March 25, 2004, at 11:56 PM, Will Coleda wrote:

I knew I should have updated to cvs latest before issuing a tcl release. =)

(go ahead and apply that patch, I'll get things fixed as soon as I can.)

If I run a very short tcl program, ala:

set a(b) whee
puts -

I get a crash in parrot, ala:

Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x00000007

Thread 0 Crashed:
 #0   0x0002d310 in pobject_lives (dod.c:179)
 #1   0x001067ec in mark_pmc_register_stack (register.c:126)
 #2   0x0010f294 in mark_context (sub.c:103)
 #3   0x001a8c6c in Parrot_Continuation_mark (continuation.c:54)
 #4   0x0002e38c in mark_special (dod.c:115)
 #5   0x0002d358 in pobject_lives (dod.c:211)
 #6   0x0002de74 in trace_mem_block (dod.c:889)
 #7   0x001946f4 in trace_system_stack (cpu_dep.c:119)
 #8   0x001946ac in trace_system_areas (cpu_dep.c:99)
 #9   0x0002d578 in trace_active_PMCs (dod.c:300)
 #10  0x0002e04c in Parrot_do_dod_run (dod.c:1028)
 #11  0x0010aef0 in more_traceable_objects (smallobject.c:111)
 #12  0x0010b028 in get_free_object (smallobject.c:177)
 #13  0x0000ef0c in get_free_pmc (headers.c:53)
 #14  0x00029ca0 in get_new_pmc_header (pmc.c:104)
 #15  0x00029fd0 in pmc_new_noinit (pmc.c:208)
 #16  0x0003af64 in Parrot_newsub_p_ic_ic (core_ops.c:508)
 #17  0x00111ddc in runops_slow_core (runops_cores.c:146)
 #18  0x0000aa10 in runops_int (interpreter.c:838)
 #19  0x0000aad8 in runops_ex (interpreter.c:865)
 #20  0x0000ad04 in runops (interpreter.c:941)
 #21  0x0000ea20 in Parrot_runcode (embed.c:693)
 #22  0x0000378c in main (main.c:559)
 #23  0x00001d60 in _start (crt.c:267)
 #24  0x00001be0 in start

Thread 1:
 #0   0x9003e9a8 in semaphore_wait_signal_trap
 #1   0x9003e7c4 in _pthread_cond_wait
 #2   0x0019a988 in queue_wait (tsq.c:319)
 #3   0x00108c24 in event_thread (events.c:905)
 #4   0x90020c28 in _pthread_body

Thread 2:
 #0   0x9002568c in select
 #1   0x001085a0 in io_thread (events.c:647)
 #2   0x90020c28 in _pthread_body

The crash is fragile - doesn't happen if you change the puts to "puts {}", or delete the second line entirely.

I'll try to find a smaller test case.

--
Will "Coke" Coleda will at coleda dot com



--
Will "Coke" Coleda will at coleda dot com




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