[Debian GNUstep maintainers] Bug#585414: imagemagick: convert: Converting TIFF to XPM fails

[Yavor Doganov]

Package: imagemagick
Version: 7:6.6.0.4-2
Severity: normal
File: /usr/bin/convert

I am adopting batmon.app for the GNUstep team, and trying to convert the
application's TIFF icon to XPM (for the benefit of debian/menu).  The
command in the build-stamp rule is the following (almost identical in
all GNUstep packages where TIFF images are used exclusively):

        convert Resources/Batmon_icon.tif -resize 32x32 batmon.xpm

When building the debian package, the error message is:

make[1]: Leaving directory `/tmp/buildd/batmon.app-0.5'
convert Resources/Batmon_icon.tif -resize 32x32 batmon.xpm
convert: unable to open image `Resources/Batmon_icon.tif': /usr/lib/ImageMagick-6.6.0/modules-Q16/coders/tiff.la @ error/blob.c/OpenBlob/2489.
convert: unable to open image `Resources/Batmon_icon.tif':  @ error/blob.c/OpenBlob/2489.
convert: missing an image filename `batmon.xpm' @ error/convert.c/ConvertImageCommand/2940.
make: *** [build-stamp] Error 1
dpkg-buildpackage: error: debian/rules build gave error exit status 2

Confusingly, if I run the command manually in a terminal, it is
different:

convert: Resources/BatMon_icon.tif: unknown field with tag 37724 (0x935c) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/703.

I tried opening the problematic file (herewith attached) in some image
viewers available in Debian (emacs23, preview.app, eog, to name a few)
and they display the image without any problem.  It looks like it was
created with a proprietary program (what a shame!), but otherwise it
doesn't seem natural to me the `convert' program to refuse to convert
it if generic image viewers are able to dipslay the image...

Is this an invalid TIFF file?  Is this a bug in imagemagick and if so,
how can I workaround it?  I am not familiar with your package at all,
and these are among the most cryptic error messages I've ever seen :-(.

Thanks in advance.

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.32-5-686 (SMP w/1 CPU core)
Locale: LANG=bg_BG.UTF-8, LC_CTYPE=bg_BG.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages imagemagick depends on:
ii  libbz2-1.0              1.0.5-4          high-quality block-sorting file co
ii  libc6                   2.11.1-3         Embedded GNU C Library: Shared lib
ii  libfontconfig1          2.8.0-2.1        generic font configuration library
ii  libfreetype6            2.3.11-1         FreeType 2 font engine, shared lib
ii  libglib2.0-0            2.24.1-1         The GLib library of C routines
ii  libgomp1                4.4.4-4          GCC OpenMP (GOMP) support library
ii  libice6                 2:1.0.6-1        X11 Inter-Client Exchange library
ii  libjpeg62               6b-16.1          The Independent JPEG Group's JPEG 
ii  liblcms1                1.18.dfsg-1.2+b1 Color management library
ii  liblqr-1-0              0.4.1-1          converts plain array images into m
ii  libltdl7                2.2.6b-2         A system independent dlopen wrappe
ii  libmagickcore3          7:6.6.0.4-2      low-level image manipulation libra
ii  libmagickwand3          7:6.6.0.4-2      image manipulation library
ii  libsm6                  2:1.1.1-1        X11 Session Management library
ii  libtiff4                3.9.2-3+b1       Tag Image File Format (TIFF) libra
ii  libx11-6                2:1.3.3-3        X11 client-side library
ii  libxext6                2:1.1.1-3        X11 miscellaneous extension librar
ii  libxt6                  1:1.0.7-1        X11 toolkit intrinsics library
ii  zlib1g                  1:1.2.3.4.dfsg-3 compression library - runtime

Versions of packages imagemagick recommends:
ii  ghostscript         8.71~dfsg2-3         The GPL Ghostscript PostScript/PDF
ii  libmagickcore3-extr 7:6.6.0.4-2          low-level image manipulation libra
ii  netpbm              2:10.0-12.1+squeeze1 Graphics conversion tools between 
ii  ufraw               0.16-3               standalone importer for raw camera

Versions of packages imagemagick suggests:
pn  autotrace            <none>              (no description available)
pn  cups-bsd | lpr | lpr <none>              (no description available)
ii  curl                 7.20.1-2            Get a file from an HTTP, HTTPS or 
pn  enscript             <none>              (no description available)
pn  ffmpeg               <none>              (no description available)
ii  gimp                 2.6.8-3             The GNU Image Manipulation Program
ii  gnuplot              4.4.0-1             A command-line driven interactive 
pn  grads                <none>              (no description available)
ii  groff-base           1.20.1-10           GNU troff text-formatting system (
pn  hp2xx                <none>              (no description available)
pn  html2ps              <none>              (no description available)
pn  imagemagick-doc      <none>              (no description available)
pn  libwmf-bin           <none>              (no description available)
pn  mplayer              <none>              (no description available)
pn  povray               <none>              (no description available)
pn  radiance             <none>              (no description available)
pn  sane-utils           <none>              (no description available)
ii  texlive-binaries [te 2009-6              Binaries for TeX Live
pn  transfig             <none>              (no description available)
ii  xdg-utils            1.0.2+cvs20100307-1 desktop integration utilities from

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