Re: segmentation fault postgres 9.3.5 core dump perlu related ?

One thing you might try is setting a breakpoint on pthread_create (or perhaps clone?) and see if that gives any clues as to what is spawning the thread. If that doesn't help, I would try commenting out large chunks of the plperlu function until the break point is not tripped, trying to find what line causes it. It might also be interesting to see what happens if you try with a non thread enabled perl-- but AFAICT nothing in cc.get_sip_id() should cause threads to be used. A very quick grep of the perl source seems to confirm this. Maybe something in the URI module?