[Radiance-general] rtrace seg fault

[Gregory J. Ward]

Hi Dave,

This appears to be a glibc internal error (consistency check), which  
indicates a bug in the malloc library on your system.  I don't think  
there's much I can do about it if that's the case.  If someone has a  
copy of the malloc.c module from glibc, I can take a look to see  
exactly where this check is happening, but that still doesn't give me  
much chance of fixing the problem if I can't reproduce it on my  
system.  There's nothing particularly funny or strange about my use  
of realloc() in rtcontrib.

The only possibility I can think of is that I'm passing an invalid  
pointer to realloc(), which is somehow generating this error rather  
than the expected one.  I checked my code, though, and I can't see  
how this could happen.

-Greg

> From: "J. David Maino" <maino at psu.edu>
> Date: March 24, 2006 6:31:06 AM PST
>
> Greg,
>
> After upgrading to the latest HEAD release I've been running  
> several different runs over the past day and it seems that the seg  
> fault is gone, but now there is another message that I am getting:
>
> *** glibc detected *** realloc(): invalid next size: 0x08060248
> Aborted
> rtrace: signal - Broken pipe
>
> It seems to work OK when I split my sensor input file up into  
> smaller segments (of 100-200 calculation points) but when I try the  
> whole file (around 2000 points) is when it has problems now. I'm  
> running the latest HEAD release on Ubuntu Linux (Breezy Badger)  
> just for reference. For now, I'm fine with using the "split"  
> command as a workaround and calculating the contributions in  
> segments, but I was wondering if there is again perhaps something  
> that I'm doing wrong?
>
> Thanks,
>
> Dave