munmap_chunk(): invalid pointer が発生する #29
Description
release-1.4 ブランチ（ 80ec152 ）で、munmap_chunk(): invalid pointer というエラーが表示されました。
再現率は 10/10回 で master ブランチ（ cdc6005 ）でも発生しましたが、develop ブランチ（ f80cf2a ）では発生しませんでした。
下記は全ログです。
$ wget -O - "https://www.google.com/images/icons/product/youtube-16.png" | img2sixel
--2015-02-15 22:49:28-- https://www.google.com/images/icons/product/youtube-16.png
Resolving www.google.com (www.google.com)... 173.194.72.106, 173.194.72.99, 173.194.72.147, ...
Connecting to www.google.com (www.google.com)|173.194.72.106|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 186 [image/png]
Saving to: 'STDOUT'
100%[===================================================================================>] 186 --.-K/s in 0s
2015-02-15 22:49:28 (20.4 MB/s) - written to stdout [186/186]
*** Error in `img2sixel': munmap_chunk(): invalid pointer: 0x0000000001592a40 ***
Aborted
$
下記は gdb で bt した結果です。
$ gdb img2sixel
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
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Reading symbols from img2sixel...done.
(gdb) run youtube-16.png
Starting program: /home/msmhrt/local/bin/img2sixel youtube-16.png
*** Error in `/home/msmhrt/local/bin/img2sixel': munmap_chunk(): invalid pointer: 0x0000000000630aa0 ***
Program received signal SIGABRT, Aborted.
0x00007ffff70bfcc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0 0x00007ffff70bfcc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007ffff70c30d8 in __GI_abort () at abort.c:89
#2 0x00007ffff70fcf24 in __libc_message (do_abort=do_abort@entry=1,
fmt=fmt@entry=0x7ffff720b6c8 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
#3 0x00007ffff7107c87 in malloc_printerr (action=<optimized out>, str=0x7ffff720ba48 "munmap_chunk(): invalid pointer",
ptr=<optimized out>) at malloc.c:4996
#4 0x000000000040fc13 in load_png (pixelformat=0x7fffffffdfe4, reqcolors=256, pncolors=0x7fffffffdfe0,
ppalette=0x7fffffffe010, pcomp=0x7fffffffdeac, psy=0x7fffffffdfd4, psx=0x7fffffffdfd0, size=<optimized out>,
buffer=0x61c250 "\211PNG\r\n\032\n") at loader.c:434
#5 load_with_builtin (reqcolors=256, fstatic=0, ppdelay=0x7fffffffe008, ploop_count=0x7fffffffdfdc,
pframe_count=0x7fffffffdfd8, ppixelformat=0x7fffffffdfe4, pncolors=0x7fffffffdfe0, ppalette=0x7fffffffe010,
pstride=<synthetic pointer>, pcomp=0x7fffffffdeac, psy=0x7fffffffdfd4, psx=0x7fffffffdfd0, pchunk=<synthetic pointer>)
at loader.c:663
#6 load_image_file (filename=filename@entry=0x7fffffffe8d6 "youtube-16.png", psx=psx@entry=0x7fffffffdfd0,
psy=psy@entry=0x7fffffffdfd4, ppalette=ppalette@entry=0x7fffffffe010, pncolors=pncolors@entry=0x7fffffffdfe0,
ppixelformat=ppixelformat@entry=0x7fffffffdfe4, pframe_count=pframe_count@entry=0x7fffffffdfd8,
ploop_count=ploop_count@entry=0x7fffffffdfdc, ppdelay=ppdelay@entry=0x7fffffffe008, fstatic=0, reqcolors=256,
ppixels=ppixels@entry=0x7fffffffe000) at loader.c:1046
#7 0x0000000000404209 in convert_to_sixel (filename=0x7fffffffe8d6 "youtube-16.png",
psettings=psettings@entry=0x7fffffffe110) at img2sixel.c:812
#8 0x00000000004034e1 in main (argc=2, argv=<optimized out>) at img2sixel.c:1676
(gdb)
既知問題でしたらすみません。