Segmentation Fault when trying to call zend_new_array.

Hello, I'm trying to learn a bit more about HashTable in PHP internally and how memory is allocated when generating arrays with various sizes. I created a simple C script that would call HashTable *ht = zend_new_array(15); However, when I compile the script with gcc, I get segmentation fault; gdb tells that the problem is located within _emalloc_56, specifically: 2535 if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) { That's how I compiled the script: gcc -I./Zend -I. -I./TSRM -I./main Zend/*.c TSRM/TSRM.c test.c -ldl -lm -g For the configuration I used: ./configure Could you please guide me in the right direction? Is there something I should do before calling zend_new_array? Sincerely, Ivan