[FFmpeg-trac] #8220(undetermined:new): left shift of 1 by 31 places cannot be represented in type 'int' in libavcodec/cinepakenc.c

[FFmpeg]

#8220: left shift of 1 by 31 places cannot be represented in type 'int'  in
libavcodec/cinepakenc.c
-------------------------------------+-------------------------------------
             Reporter:  Suhwan       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  ubsan        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 There is a left shift of 1 by 31 places cannot be represented in type
 'int'  in libavcodec/cinepakenc.c
 {{{
 libavcodec/cinepakenc.c:602:32: runtime error: left shift of 1 by 31
 places cannot be represented in type 'int'
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 libavcodec/cinepakenc.c:602:32 in
 }}}
 How to reproduce:
 {{{
 % ffmpeg_g -t 3 -stream_loop 23 -y -i $PoC -loglevel 0 -map 0 -c copy
 -c:v:0 cinepak -c:v:52 text -disposition:s:8 adpcm_ms -disposition:v:213
 r10k -vframes 95 -aframes 2 -ab 104k -strict 3 tmp.avs2

 ffmpeg version N-95199-g9847380f5f Copyright (c) 2000-2019 the FFmpeg
 developers
   built with clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
   configuration: --cc=clang --cxx=clang++ --ld=clang --enable-debug
 --toolchain=clang-usan
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8220>
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