[MPlayer-users] Major regression in r36452, sig 11 demux_open

Reimar Döffinger Reimar.Doeffinger at gmx.de
Tue Sep 24 09:49:33 CEST 2013

Josh <joshf87 at live.com> wrote:
>On 9/22/2013 03:34, Reimar Döffinger wrote:
>> On Sun, Sep 22, 2013 at 12:29:05AM -0400, Josh wrote:
>>> I thought this was an FFmpeg regression but reverting to a known
>>> good FFmpeg revision didn't fix the regression. Basically, in every
>>> single h264/webm file I am getting a "Signal 11: demux_open" error.
>>> I have traced this to r36452. There might be other formats affected.
>> Should be fixed.
>> It only happened "randomly", depending on your system, compilation
>> options, configuration etc.
>> The backtrace was completely misleading though.
>> I don't know if you care about these things, but
>> http://www.drmemory.org/ is a great tool for Windows that like
>> valgrind on Linux/OSX makes tracking down these things much simpler.
>> _______________________________________________
>> MPlayer-users mailing list
>> MPlayer-users at mplayerhq.hu
>> https://lists.mplayerhq.hu/mailman/listinfo/mplayer-users
>Is this easier to decipher? Do you care about the 'leak' errors?

Not easier to decipher, but at least contains the correct information :-)
But just to avoid misunderstandings: you can confirm it is fixed?

>Error #1: UNINITIALIZED READ: reading register eax
># 0 av_dict_get                       [libavutil/dict.c:43]

This one points directly to the issue: an uninitialized dict pointer.
Some of the leaks sound worrying, but I suspect they only appear because MPlayer crashed and this could not free things. So unless they appear when it does not crash they are not relevant.

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