[gt-users] range assertion failed

[Brent Pedersen]

hi, i have a long-running python script, and after about an hour, it
err's out with:

Assertion failed: (range->start <= range->end), function
gt_range_length, file src/core/range.c, line 186.
This is probably a bug, please report it.

i've added python assertions everywhere to make sure it's only getting
start < end, all of my gff input validates
(through gt gff3validator), and i'm not creating any new features. and
this happens much after i've created a FeatureIndexMemory
and done add_gff3file(), so it's definitely not on the initial
creation. and anywhere i'm doing a range query, i've added a test to
make
sure the start < stop? could it be an overflow error in ctypes or c--
(actually, i'll add a check for that now...)
any other ideas on how i can track this down?

thanks,
-brent