[FFmpeg-trac] #8122(undetermined:closed): Multiple uninitialized use on stack in ffmpeg

[FFmpeg]

#8122: Multiple uninitialized use on stack in ffmpeg
-------------------------------------+-------------------------------------
             Reporter:  bwang        |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:  invalid
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by bwang):

 Replying to [comment:8 jamrial]:
 > How could we give you information about something we can't even
 reproduce?
 >
 > By using -hide_banner your log file is missing vital information like
 compiler version, so anyone that could attempt to reproduce this with the
 same Clang toolchain you're using can't because we don't know what version
 you're using.

 Below is the output generated by ffmpeg without -hide_banner:
 ffmpeg version N-94793-gdb92a3e463 Copyright (c) 2000-2019 the FFmpeg
 developers
   built with clang version 7.0.0-3 (tags/RELEASE_700/final)
   configuration: --cc=clang
   libavutil      56. 35.100 / 56. 35.100
   libavcodec     58. 56.101 / 58. 56.101
   libavformat    58. 32.104 / 58. 32.104
   libavdevice    58.  9.100 / 58.  9.100
   libavfilter     7. 58.102 /  7. 58.102
   libswscale      5.  6.100 /  5.  6.100
   libswresample   3.  6.100 /  3.  6.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/bwang/Bowen/gitrepo/buddy-
 test-results/ffmpeg-09052017/monitor_out/input.10522':
   Metadata:
     major_brand     : mp42
     minor_version   : 1
     compatible_brands: isommp42dash
     creation_time   : 2010-06-19T19:20:15.000000Z
   Duration: 00:00:32.90, start: 0.000000, bitrate: 243 kb/s
     Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 /
 0x31637661), yuv420p, 320x180, 205 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
 (default)
     Metadata:
       creation_time   : 1970-01-01T00:00:00.000000Z
       handler_name    : VideoHandler
     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 16000 Hz, mono,
 fltp, 27 kb/s (default)
     Metadata:
       creation_time   : 1970-01-01T00:00:00.000000Z
       handler_name    : SoundHandler
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))
   Stream #0:1 -> #0:1 (aac (native) -> pcm_s16le (native))
 Press [q] to stop, [?] for help
 Output #0, null, to '/dev/null':
   Metadata:
     major_brand     : mp42
     minor_version   : 1
     compatible_brands: isommp42dash
     encoder         : Lavf58.32.104
     Stream #0:0(eng): Video: wrapped_avframe, yuv420p(progressive),
 320x180, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default)
     Metadata:
       creation_time   : 1970-01-01T00:00:00.000000Z
       handler_name    : VideoHandler
       encoder         : Lavc58.56.101 wrapped_avframe
     Stream #0:1(eng): Audio: pcm_s16le, 16000 Hz, mono, s16, 256 kb/s
 (default)
     Metadata:
       creation_time   : 1970-01-01T00:00:00.000000Z
       handler_name    : SoundHandler
       encoder         : Lavc58.56.101 pcm_s16le
 frame=  812 fps= 91 q=-0.0 Lsize=N/A time=00:00:32.89 bitrate=N/A
 speed=3.69x
 video:425kB audio:1026kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown

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Ticket URL: <https://trac.ffmpeg.org/ticket/8122#comment:10>
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