Let me paraphrase. "I am new to perl programming, but I'm combining a whole lot of complex things that I'm not going to show you in a way that is likely to go boom and it went boom. Here is the core dump. Can you please debug my problem?"

Uh...

There are just too many reasonable possibilities to look at. Looking at the dump it looks like a thread got a signal and dumped core instead of handling it properly. At a really wild guess it has to do with the bug fixed by patch 33741. (If I am right, then I should go and buy a lottery ticket.)