[Octave-bug-tracker] [bug #30974] __magick_read__.cc only initializes GraphicsMagick in __magick_read__

[Jonathan Thomson]

URL:
  <http://savannah.gnu.org/bugs/?30974>

                 Summary: __magick_read__.cc only initializes GraphicsMagick
in __magick_read__
                 Project: GNU Octave
            Submitted by: jthomson
            Submitted on: Mon 06 Sep 2010 09:07:47 AM GMT
                Category: Interpreter
                Severity: 3 - Normal
              Item Group: Crash
                  Status: None
             Assigned to: None
         Originator Name: Jonathan Thomson
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.2.4
        Operating System: GNU/Linux

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Details:

__magick_read__.cc only initializes GraphicsMagick in __magick_read__. If
__magick_finfo__ or magick_write__ are called before __magick_read__ the
following error is thrown by GraphicsMagick and Octave quits.

octave: magick/semaphore.c:525: LockSemaphoreInfo: Assertion `semaphore_info
!= (SemaphoreInfo *) ((void *)0)' failed.
panic: Aborted -- stopping myself...
Aborted

Therefore a user cannot call imfinfo() or imwrite() before imread() without
an error being thrown. The solution is for each function to check if
GraphicsMagick has been initialized and if not then call InitializeMagick();



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File Attachments:


-------------------------------------------------------
Date: Mon 06 Sep 2010 09:07:47 AM GMT  Name: finfo_magick_initialize.patch 
Size: 1kB   By: jthomson
Patch to call InitializeMagick in __magick_finfo__ and __magick_write__
<http://savannah.gnu.org/bugs/download.php?file_id=21394>

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