[FFmpeg-trac] #2048(avcodec:open): reproducible crash on some subtitles in ff_ass_split_override_codes()

[FFmpeg]

#2048: reproducible crash on some subtitles in ff_ass_split_override_codes()
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             Reporter:  julian       |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  ass crash    |               Blocked By:
  SIGSEGV                            |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by julian):

 seems this crash does not only occur in "obscure" asiatic subtitles but
 also in german ones, e.g.  in this file:

 "Star-Trek-German-720p-BluRay-x264-EmpireHD" / "empire-st11-720p.mkv".

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2048#comment:2>
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