Hi,
> From: Hazen Babcock
> To: PLplot development list <Plplot-devel@lists.sourceforge.net>
> Sent: Monday, 22 December, 2008 16:07:06
> Subject: [Plplot-devel] segfault in example 21
>
>
> Hello,
>
> In the process of updating the webpage, I've discovered that example 21
> segfaults on my new linux box. I'm running Ubuntu 8.10 (64bit).
>
> Based on printf debugging, I believe the crash occurs in plgriddata(). I
> thought it might be qhull related, but it doesn't look like qhull has
> changed since 2003.
>
> The example will run "fine" if I pull plgriddata out of the for loop (so
> that it only gets called once) and ask for type 0 (GRID_CSA?)
> interpolation. It will crash if I try type 1 interpolation. It will also
> crash if the function is inside the for loop, but is set to always use
> type 0 interpolation.
> Ideas?
I haven't got a solution but just to record that I have also encountered a
segfault in example 21. At this stage I thought it was probably a change I had
made as I was in the middle of building a modified version of plplot using
"non-system" tcl/tk libraries on cygwin. I started to unwind the changes but
unfortunately I haven't had time to find the cause. Further I am now away from
my development machine till the new year so I am writing this from memory.
I was using (32 bit) cygwin 1.5 with gcc 3.x and the recent cygwin upgrade to
X11R7.4 libraries.
PLPlot would have been a modified version of the (post 5.91) svn version.
PLPlot was built with csa library but not qhull.
The program was crashing in plgriddata and I think it was within the csa
routines (it was about this point I had to stop).
Finally, I was using the test scripts so non-interactive examples 1-20 had run
without crashing but I didn't check the output.
Sorry I can't be of more help.
Kind regards
Terrence
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