Segmenation fault

Hi List! I am working on a CLI script (PHP 5.5.25) that parses and imports large amounts of data into a database. Usually, the script runs for 5-15 minutes. For the most part, the script is working just fine. But for some reason, it seems to hit some limit and PHP crashes with a segmentation fault. I managed to hook GDB to the PHP process and got a backtrace. Unfortunately, I am not so much wiser than before. Can someone be so kind and point me into the right direction and give me a hint why PHP crashes? The backtrace: Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000018 0x000000010e8f416f in zend_signal_handler_unblock () (gdb) bt #0 0x000000010e8f416f in zend_signal_handler_unblock () #1 0x000000010e8b47d5 in _zend_mm_alloc_int () #2 0x000000010e884cd4 in vspprintf () #3 0x000000010f5e112f in xdebug_error_cb () #4 0x000000010e8d5875 in zend_error () #5 0x000000010e8f4121 in zend_signal_handler () #6 0x000000010e8f3fae in zend_signal_handler_defer () #7 <signal handler called> #8 0x00007fff855fce9a in write$NOCANCEL () #9 0x00007fff8fae8970 in _swrite () #10 0x00007fff8fae15e9 in __sflush () […] I have already tried to give PHP more memory (512MB) but that had no impact on the segmentation fault. Any ideas? Thank you! /frank