[ptx] Hugin crash: how to debug

[Pablo d'Angelo]

Aleksandr Milewski wrote:

> Other panos work just fine.
> 
> This problem occurs with 0.5rc1, the 0602 snapshot, or something newer I 
> built for Linux from CVS.
> 
> If you open the project and attempt to calculate FOV, you'll get an 
> unhandled exception dialog (Abort/Retry/Ignore) on Windows, and on 
> Linux/amd64 (after a long pause) you get:
> 
> ERROR: 16:04:11.136334 (../../src/include/common/utils.h:220) 
> lexical_cast(): lexical cast error
> Aborted
> 
> So, how do I collect more info for debugging purposes? "It doesn't" 
> isn't much of a bug report.

I can reproduce the bug, and I'll look at it once I have time. However, 
the bug only seems to appear for really strange values of the distortion 
parameters a,b,c. For "normal" lenses, they should be in the range of 
-0.2 .. 0.2 or so.

They are set them to 0.001 or so, everything works fine. You should not 
try to optimize all parameters with just 4 or 3 corresponding points per 
image file, like in the example you posted, this will lead to very 
strange results.

ciao
   Pablo