[FFmpeg-trac] #975(avfilter:new): commit 151ecc2aecd81718e2520936dd3c537d7e6fe2fc causes segfault when using overlay filter

[FFmpeg]

#975: commit 151ecc2aecd81718e2520936dd3c537d7e6fe2fc causes segfault when using
overlay filter
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             Reporter:  nichot20    |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by nichot20):

 OK I have narrowed the issue down a little.
 Previously I had only managed to git bisect on the origin/master, not the
 qatar/master tracking branch.

 However I have now patched in the

 3715d841a619f1cbc4776d9b00575dae6fb6534a
 to
 af79a0c48a41fd99b674b39ac509ae442974715d

 changes onto

 b8c16558828e73e933ae73b5888345d50e897dfc

 These include the changes to the png DSP functions.

 I can confirm that a build based on the above 4 patches up from the git
 bisect good fails. Suggesting that the issue is within the changes to the
 DSP  to use yasm.

 My build environment is OpenSuSE 12.1 with gcc 4.6.2 & yasm yasm
 1.1.0.2352

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/975#comment:8>
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