.
Thread 2 (process 8302):
#0  0x00007fb8d17dd411 in ?? () from /lib/libc.so.6
#1  0x00007fb8d17dec58 in ?? () from /lib/libc.so.6
#2  0x00007fb8d17df036 in free () from /lib/libc.so.6
#3  0x00000000006547d9 in zend_mm_shutdown ()
#4  0x000000000062959a in php_module_shutdown ()
#5  0x00000000006ee44e in main ()
.
Thread 1 (process 8306):
#0  0x00007fb8cb05c1cf in ?? () from /lib/libgcc_s.so.1
#1  0x00007fb8cb05cb1b in ?? () from /lib/libgcc_s.so.1
#2  0x00007fb8cb05cc23 in _Unwind_ForcedUnwind () from /lib/libgcc_s.so.1
#3  0x00007fb8d3420780 in __pthread_unwind () from /lib/libpthread.so.0
#4  0x00007fb8d341ab35 in pthread_exit () from /lib/libpthread.so.0
#5  0x00007fb8cca4b1fb in ?? ()
#6  0x0000000000000000 in ?? ()