I've been using POV-Ray under Linux for just a couple of days. I always 
save my images as png files. Never encountered a single problem.
Now, just a few minutes ago, after 3 hours of rendering, POV-Ray crashed 
with a segmentation fault. Every attempt to render again the scene as a 
png image resulted in another segmentation fault. It seems to work fine 
with tga.

Any clue what this might be due to?

--
Jonathan.

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JRG wrote:
> I've been using POV-Ray under Linux for just a couple of days. I always 
> save my images as png files. Never encountered a single problem.
> Now, just a few minutes ago, after 3 hours of rendering, POV-Ray crashed 
> with a segmentation fault. Every attempt to render again the scene as a 
> png image resulted in another segmentation fault. It seems to work fine 
> with tga.
> 
> Any clue what this might be due to?

Do you use the official binary or a self compiled version?

If you use a self built version you should try building with the libpng 
version coming with POV-Ray and not the one installed on the system.

Christoph

-- 
POV-Ray tutorials, include files, Landscape of the week:
http://www.imagico.de/ (Last updated 31 Oct. 2005)
MegaPOV with mechanics simulation: http://megapov.inetart.net/

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Christoph Hormann wrote:
> JRG wrote:
>> I've been using POV-Ray under Linux for just a couple of days. I 
>> always save my images as png files. Never encountered a single problem.
>> Now, just a few minutes ago, after 3 hours of rendering, POV-Ray 
>> crashed with a segmentation fault. Every attempt to render again the 
>> scene as a png image resulted in another segmentation fault. It seems 
>> to work fine with tga.
>>
>> Any clue what this might be due to?
> 
> Do you use the official binary or a self compiled version?
> 
> If you use a self built version you should try building with the libpng 
> version coming with POV-Ray and not the one installed on the system.
> 
> Christoph
> 

Hmm, I have the feeling it's not something POV-Ray related... Kopete 
just keeps on crashing... and here's a snip of the backtrace log I get:


[KCrash handler]
#4  0x41908fdf in __deregister_frame () from /lib/libgcc_s.so.1
#5  0x418e9328 in deflateParams () from /lib/libz.so.1
#6  0x418e83b9 in deflate () from /lib/libz.so.1
#7  0x419f1b00 in png_write_filtered_row () from /usr/lib/libpng.so.3
#8  0x000007f2 in ?? ()
#9  0x41a1c66c in ?? () from /usr/lib/libpng.so.3
#10 0x00000092 in ?? ()
#11 0x0836a390 in ?? ()
#12 0x419f2026 in png_write_find_filter () from /usr/lib/libpng.so.3

Anyway, I'm using a pre-compiled version coming with the SUSE 10 
distribution.

--
Jonathan.

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JRG wrote:
> Anyway, I'm using a pre-compiled version coming with the SUSE 10 
> distribution.

What version of POV-Ray is included with Suse 10?

	Thorsten

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Thorsten Froehlich wrote:
> JRG wrote:
>> Anyway, I'm using a pre-compiled version coming with the SUSE 10 
>> distribution.
> 
> What version of POV-Ray is included with Suse 10?
> 
>     Thorsten

"Persistence of Vision(tm) Ray Tracer Version 3.6.1 (g++ 4.0.2 @
  i686-pc-linux-gnu)
This is an unofficial version compiled by:
  SUSE LINUX Products GmbH, Nuernberg, Germany
  The POV-Ray Team(tm) is not responsible for supporting this version.
POV-Ray is based on DKBTrace 2.12 by David K. Buck & Aaron A. Collins
Copyright 1991-2003 Persistence of Vision Team
Copyright 2003-2004 Persistence of Vision Raytracer Pty. Ltd."

--
Jonathan.

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JRG wrote:
> 
> [KCrash handler]
> #4  0x41908fdf in __deregister_frame () from /lib/libgcc_s.so.1
> #5  0x418e9328 in deflateParams () from /lib/libz.so.1
> #6  0x418e83b9 in deflate () from /lib/libz.so.1
> #7  0x419f1b00 in png_write_filtered_row () from /usr/lib/libpng.so.3
> #8  0x000007f2 in ?? ()
> #9  0x41a1c66c in ?? () from /usr/lib/libpng.so.3
> #10 0x00000092 in ?? ()
> #11 0x0836a390 in ?? ()
> #12 0x419f2026 in png_write_find_filter () from /usr/lib/libpng.so.3

If two programs have trouble with libpng/zlib things seem quit clear to me.

> Anyway, I'm using a pre-compiled version coming with the SUSE 10 
> distribution.

Which surely is dynamically linked against the system libpng.  Fix your 
libs or build your own using the libraries coming with POV-Ray and you 
will be fine.

If your system libpng is broken it is astonishing though that you don't 
experience a lot of other problems.

Christoph

-- 
POV-Ray tutorials, include files, Landscape of the week:
http://www.imagico.de/ (Last updated 31 Oct. 2005)
MegaPOV with mechanics simulation: http://megapov.inetart.net/

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Christoph Hormann wrote:

> If two programs have trouble with libpng/zlib things seem quit clear to me.

Yep...


> Which surely is dynamically linked against the system libpng.  Fix your 
> libs or build your own using the libraries coming with POV-Ray and you 
> will be fine.

"Support libraries used by POV-Ray:
   ZLib 1.2.3, Copyright 1995-1998 Jean-loup Gailly and Mark Adler
   LibPNG 1.2.8, Copyright 1998-2002 Glenn Randers-Pehrson
   LibJPEG 6b, Copyright 1998 Thomas G. Lane
   LibTIFF 3.7.3, Copyright 1988-1997 Sam Leffler, 1991-1997 SGI"

(Don't you find I'm the laziest person on earth?)

> If your system libpng is broken it is astonishing though that you don't 
> experience a lot of other problems.

Hmm... never experienced a single crash in a month. Until now that is... 
maybe I'll just try and reboot first...

--
Jonathan.

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