GLib (gthread-posix.c): Unexpected error from C library during 'pthread_mutex_lock': Invalid argument. Aborting.

[Sergei Vorobyov]

I clipped a very small program, no threads, from my code which unrefs
nothing (except one NONEMPTY message gst_bus_pop_filtered from the bus to
detect EOS, ERROR, SEGMENT_DONE, time expired) but fails the same way very
quickly playing just two .wmv files in a cycle on i965_drv_video.so through
filesrc location=... ! decodebin ! videoconvert ! autovideosink.

I will carefully inspect it and then proceed to valgrinding it.

Thanks for the hints!

On Tue, Sep 23, 2014 at 4:12 PM, Nicolas Dufresne <
nicolas.dufresne at collabora.com> wrote:

>
> Le 2014-09-23 09:57, Sergei Vorobyov a écrit :
>
>> The art of debugging is about zooming in on the real problem, cutting off
>> trivial or nonessential things, not to debug everything altogether with the
>> biggest hammer available.
>>
> Up to you, my far guess is that you actually unref too much something
> somewhere, and endup doing "use after free" object that holds a mutex and
> crash. Normally, valgrind, with the environment G_SLICE=always_malloc gives
> an overview of that very quickly, and can often be done before cutting down
> you pipeline. I say you, because it's an habit to blame the new and shiny
> code, but obviously it's not impossible that libvaapi or the graphic driver
> is bugged. You have already said that without HW acceleration it's fine.
>
>
> Nicolas
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>
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