[Mono-dev] crash with nunit

[David Schmitt]

Thanks to guidance from Greg Young, I've been able to isolate a proper 
backtrace from nunit-console:

> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x7fffef97a700 (LWP 26908)]
> slow_object_get_size (o=0x7fffea860010, vtable=<optimized out>) at ../../mono/metadata/sgen-gc.h:722
> 722             } else if (klass->rank) {
> (gdb) backtrace
> #0  slow_object_get_size (o=0x7fffea860010, vtable=<optimized out>) at ../../mono/metadata/sgen-gc.h:722
> #1  sgen_par_object_get_size (o=0x7fffea860010, vtable=<optimized out>) at ../../mono/metadata/sgen-gc.h:766
> #2  sgen_safe_object_get_size (obj=0x7fffea860010) at ../../mono/metadata/sgen-gc.h:777
> #3  sgen_major_is_object_alive (object=0x7fffea860010) at sgen-gc.c:3589
> #4  sgen_is_object_alive_for_current_gen (object=0x7fffea860010 "\b\020\206\352\377\177") at sgen-gc.c:3624
> #5  mark_ephemerons_in_range (ctx=...) at sgen-gc.c:3802
> #6  0x00000000005d1d2c in finish_gray_stack (generation=generation at entry=1, queue=0x972f00) at sgen-gc.c:1931
> #7  0x00000000005d3b65 in major_finish_collection (reason=0x705072 "user request", old_next_pin_slot=108, scan_mod_union=0) at sgen-gc.c:3164
> #8  0x00000000005d4182 in major_do_collection (reason=<optimized out>) at sgen-gc.c:3305
> #9  major_do_collection (reason=0x705072 "user request") at sgen-gc.c:3287
> #10 0x00000000005d7677 in sgen_perform_collection (requested_size=requested_size at entry=0, generation_to_collect=generation_to_collect at entry=1,
>     reason=reason at entry=0x705072 "user request", wait_to_finish=wait_to_finish at entry=1) at sgen-gc.c:3499
> #11 0x00000000005d7cf8 in mono_gc_collect (generation=1) at sgen-gc.c:4623
> #12 0x000000000059e3bb in unload_thread_main (arg=0x4a50380) at appdomain.c:2334
> #13 0x000000000061e871 in thread_start_routine (args=args at entry=0x9cfbb0) at wthreads.c:294
> #14 0x000000000062e810 in inner_start_thread (arg=0x4a4d5b0) at mono-threads-posix.c:49
> #15 0x00007ffff7539b50 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
> #16 0x00007ffff72840ed in clone () from /lib/x86_64-linux-gnu/libc.so.6
> #17 0x0000000000000000 in ?? ()
> (gdb)

I'll retry with master next.


Regards, David

On 25.03.2014 15:56, Zoltan Varga wrote:
> Hi,
>
>    Could you try with master or the mono-3.4.0-branch ? If the problem
> is still there, please log a bug report with reproduction instructions/a
> testcase if possible.
>
>               Zoltan
>
>
> On Tue, Mar 25, 2014 at 10:44 AM, David Schmitt <david at dasz.at
> <mailto:david at dasz.at>> wrote:
>
>     Hi,
>
>     I've finally updated to 3.2.8 (recompiled from debian experimental)
>     and am now triggering the attached segfault approximately every
>     second run.
>
>     For further analysis I could run this under master; try to upgrade
>     nunit; try to get more debugging symbols into the package; try to
>     reduce the amount of code running to trigger the problem.
>
>     The project is open source, so if that would be easier I can provide
>     public repro steps too.
>
>
>     Please advise,
>
>     Thanks David
>
>
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