Eeek! The filter or plug-in you’re working on has a bug in it! And the fix isn’t completely obvious, so you want to use a debugger to see what is going on. Debugging a filter is straight-foward like debugging GIMP (since the filter is a shared library loaded by GEGL which is loaded by GIMP, GIMP process will crash so the debugger can catch the threads information, including the one on which the filter crashed). So, see: Debugging Tips.
