[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `php pandas.php'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000055ffb2b60273 in add_assoc_zval_ex ()
[Current thread is 1 (Thread 0x7fd7cacc9e00 (LWP 9483))]
(gdb) bt
#0 0x000055ffb2b60273 in add_assoc_zval_ex ()
#1 0x00007fd7ca6ce55f in dict2array (pv=0x7fd7add88b00, zv=0x7fd7caa142f0) at /home/ubuntu/phpy/src/bridge/core.cc:252
#2 0x00007fd7ca6d2057 in zim_PyCore_scalar (execute_data=<optimized out>, return_value=0x7fd7caa142f0) at /home/ubuntu/phpy/src/php/core.cc:160
#3 0x000055ffb2cb0b74 in execute_ex ()
#4 0x000055ffb2cca1d7 in zend_execute ()
#5 0x000055ffb2b56ae2 in zend_execute_scripts ()
#6 0x000055ffb2a875f2 in php_execute_script ()
#7 0x000055ffb2df6fd7 in do_cli ()
#8 0x000055ffb2df85a5 in main ()