double free error

Hi Serge,

This problem should not arise. I mean, this is code that's been running for decades, literally, with no problem on other machines. So, it's probably a symptom of something else failing somewhere else in the code, causing this code to be run twice on the same structure.

I think it is a good start what you're listing here, but please read this www.tbamud.com/forum/4-development/6-debugging-tutorial-for-gdb for a better description of how to use gdb.
I would very much like to know the output of print *d and print d->history as well as info local to be able to offer any help here.

Some questions I would want answered: could this be an already free'd descriptor_data? Which index of the history array are we freeing? What was in the rest of this array?