[Bug 1492883] Re: Failed assertion in blob.c:500

[Moshe Kaplan]

https://github.com/ImageMagick/ImageMagick/issues/26

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Title:
  Failed assertion in blob.c:500

Status in imagemagick package in Ubuntu:
  New

Bug description:
  magick: ../ImageMagick_git/MagickCore/blob.c:500: MagickBooleanType
  CloseBlob(Image *): Assertion `image != (Image *) ((void*)0)' failed.

  
  Stack trace:

  #0  0xb7fdbd4c in __kernel_vsyscall ()
  #1  0xb707d607 in __GI_raise (sig=sig at entry=0x6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
  #2  0xb7080a33 in __GI_abort () at abort.c:89
  #3  0xb7076757 in __assert_fail_base (fmt=0xb71b4014 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion at entry=0x8681f5c "image != (Image *) ((void*)0)", file=file at entry=0x87679dd "../ImageMagick_git/MagickCore/blob.c", line=line at entry=0x1f4, function=function at entry=0x8767b81 "MagickBooleanType CloseBlob(Image *)") at assert.c:92
  #4  0xb7076807 in __GI___assert_fail (assertion=0x8681f5c "image != (Image *) ((void*)0)", file=0x87679dd "../ImageMagick_git/MagickCore/blob.c", line=0x1f4, function=0x8767b81 "MagickBooleanType CloseBlob(Image *)") at assert.c:101
  #5  0x08354212 in CloseBlob (image=<optimized out>) at ../ImageMagick_git/MagickCore/blob.c:500
  #6  0x0831b147 in ReadOneJNGImage (mng_info=0x885e4c8, image_info=0x883e1f8, exception=0x88460c8) at ../ImageMagick_git/coders/png.c:4603
  #7  0x082ee501 in ReadMNGImage (image_info=0x883e1f8, exception=0x8845570) at ../ImageMagick_git/coders/png.c:6368
  #8  0x083a678d in ReadImage (image_info=<optimized out>, exception=0x88331d8) at ../ImageMagick_git/MagickCore/constitute.c:493
  #9  0x083a85ef in ReadImages (image_info=<optimized out>, filename=<optimized out>, exception=<optimized out>) at ../ImageMagick_git/MagickCore/constitute.c:846
  #10 0x086535a4 in CLINoImageOperator (cli_wand=0x0, option=<optimized out>, arg1n=<optimized out>, arg2n=0x0) at ../ImageMagick_git/MagickWand/operation.c:4656
  #11 0x08655664 in CLIOption (cli_wand=0x8838bf0, option=0x868c8a1 "-read") at ../ImageMagick_git/MagickWand/operation.c:5150
  #12 0x085a00bc in ProcessCommandOptions (cli_wand=<optimized out>, argc=<optimized out>, argv=<optimized out>, index=<optimized out>) at ../ImageMagick_git/MagickWand/magick-cli.c:474
  #13 0x085a0ee5 in MagickImageCommand (image_info=<optimized out>, argc=0x3, argv=0xbffff104, metadata=<optimized out>, exception=<optimized out>) at ../ImageMagick_git/MagickWand/magick-cli.c:786
  #14 0x085d0983 in MagickCommandGenesis (image_info=<optimized out>, command=<optimized out>, argc=<optimized out>, argv=<optimized out>, metadata=0x0, exception=0x88331d8) at ../ImageMagick_git/MagickWand/mogrify.c:172
  #15 0x08052897 in MagickMain (argc=<optimized out>, argv=0xbffff104) at ../ImageMagick_git/utilities/magick.c:76
  #16 main (argc=<optimized out>, argv=0xbffff104) at ../ImageMagick_git/utilities/magick.c:89

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