> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_PROTECTION_FAILURE at address: 0x00000000
> 0x969721e5 in strtol_l ()
> (gdb) list
> 1
> 2       /* png.c - location for general purpose libpng functions
> 3        *
> 4        * Last changed in libpng 1.2.21 October 4, 2007
> 5        * For conditions of distribution and use, see copyright
> notice in png.h
> 6        * Copyright (c) 1998-2007 Glenn Randers-Pehrson
> 7        * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
> 8        * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat,
> Group 42, Inc.)
> 9        */
> 10

I dont suppose anyone else would be willing to try to build this? lol ... I 
noticed the list pointing to png.c and the fact that it was a slightly dated 
version so I removed libpng(3) and shlibs related. Then I compiled the latest 
zlib and png and managed to get the same error in the same spot but pointing to 
the new version:

1
2       /* png.c - location for general purpose libpng functions
3        *
4        * Last changed in libpng 1.2.30 [August 15, 2008]
5        * For conditions of distribution and use, see copyright notice in png.h
6        * Copyright (c) 1998-2008 Glenn Randers-Pehrson
7        * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
8        * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, 
Inc.)
9        */
10


Does anyone know a good resource for debugging properly with gdb? I've been 
hitting man pages and a few mini howto's but I'm just not finding anything I 
can work with. I did a set on the symbol hoping that if I could get past it I'd 
see something new but to no avail:
(gdb) display strtol_l                                      
1: {<text variable, no debug info>} 0x969721b1 <strtol_l> = {<text variable, no 
debug info>} 0x969721b1 <strtol_l>
(gdb) set strtol_l                                                              
                                  
(gdb) display strtol_l                                                          
                                      
2: {<text variable, no debug info>} 0x969721b1 <strtol_l> = {<text variable, no 
debug info>} 0x969721b1 <strtol_l>    
(gdb) whatis strtol_l                                                           
                                     
type = <text variable, no debug info>                                           
                                     
(gdb) x                                                                         
                                     
0x969721b2 <strtol_l+1>:        0x5657e589                                      
                                      
(gdb) enable mem                                                                
                                      
(gdb) c
Continuing.

Eventually I got it to progress ... kind of:
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000000          
0x969721e5 in strtol_l ()                                      
2: {<text variable, no debug info>} 0x969721b1 <strtol_l> = {<text variable, no 
debug info>} 0x969721b1 <strtol_l>
1: {<text variable, no debug info>} 0x969721b1 <strtol_l> = {<text variable, no 
debug info>} 0x969721b1 <strtol_l>
(gdb) return                                                                    
                                  
Make selected stack frame return now? (y or n) y                                
                                  
#0  0x969721ab in atoi ()                                                       
                                 
(gdb) c
Continuing.
invalid arguments
Usage: ffmpegthumbnailer [options]

Options:
  -i<s>  : input file
  -o<s>  : output file
  -s<n>  : thumbnail size (default: 128)
  -t<n>  : time to seek to (percentage) (default: 10)
  -f     : create a movie strip overlay              
  -w     : workaround issues in old versions of ffmpeg
  -h     : display this help                          

Program exited normally
(gdb)

I'm thinking this is just because I _side stepped_ the error *shrug*. Let me 
know if you'd prefer I take this off the list. The content is changing slowly 
migrating away from _fink dev_ but I would like to get it working and add it to 
the packages if aproved.

Thanks guys,
Lonny

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