(gdb) bt full
#0  0x00000008021d67b4 in realloc () from /lib/libc.so.7
No symbol table info available.
#1  0x00000008021d6d51 in free () from /lib/libc.so.7
No symbol table info available.
#2  0x00000008032ba168 in amqp_destroy_envelope () from /usr/local/lib/librabbitmq.so.4
No symbol table info available.
#3  0x0000000803098539 in zm_startup_amqp_exchange () from /usr/local/lib/php/20170718/amqp.so
No symbol table info available.
#4  0x0000000000603261 in ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER ()
No symbol table info available.
#5  0x00000000005c6678 in execute_ex ()
No symbol table info available.
#6  0x00000000005c6800 in zend_execute ()
No symbol table info available.
#7  0x0000000000583a63 in zend_execute_scripts ()
No symbol table info available.
#8  0x000000000051fe1e in php_execute_script ()
No symbol table info available.
#9  0x0000000000653a20 in do_cli ()
No symbol table info available.
#10 0x0000000000652b24 in main ()
No symbol table info available.
#11 0x000000000041fc7f in _start ()
No symbol table info available.
#12 0x0000000800a32000 in ?? ()
No symbol table info available.
#13 0x0000000000000000 in ?? ()
No symbol table info available.