gdb output

lupi2:/usr/local/src/php/php-5.5.14# gdb php-fpm
GNU gdb (GDB) 7.4.1-debian
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/local/sbin/php-fpm...done.
warning: not using untrusted file ".gdbinit"
(gdb) c
The program is not being run.
(gdb) run
Starting program: /usr/local/sbin/php-fpm 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
zend_hash_merge_ex (target=target@entry=0x120da50, source=0xd0, pCopyConstructor=0x820100 <zval_add_ref>, size=size@entry=8, pMergeSource=pMergeSource@entry=0x7fd2c0 <do_inherit_constant_check>, pParam=0x0)
    at /usr/local/src/php/php-5.5.14-fpm/Zend/zend_hash.c:890
890		p = source->pListHead;
(gdb) bt
#0  zend_hash_merge_ex (target=target@entry=0x120da50, source=0xd0, pCopyConstructor=0x820100 <zval_add_ref>, size=size@entry=8, pMergeSource=pMergeSource@entry=0x7fd2c0 <do_inherit_constant_check>, pParam=0x0)
    at /usr/local/src/php/php-5.5.14-fpm/Zend/zend_hash.c:890
#1  0x0000000000803fa6 in zend_do_implement_interface (ce=ce@entry=0x120d980, iface=0x0) at /usr/local/src/php/php-5.5.14-fpm/Zend/zend_compile.c:3781
#2  0x0000000000828981 in zend_class_implements (class_entry=0x120d980, num_interfaces=<optimized out>, num_interfaces@entry=2) at /usr/local/src/php/php-5.5.14-fpm/Zend/zend_API.c:2554
#3  0x00000000005cfc86 in zm_startup_imagick (type=<optimized out>, module_number=17) at /usr/local/src/php/php-5.5.14-fpm/ext/imagick/imagick.c:2938
#4  0x0000000000823056 in zend_startup_module_ex (module=0x1113ca0) at /usr/local/src/php/php-5.5.14-fpm/Zend/zend_API.c:1759
#5  zend_startup_module_ex (module=0x1113ca0) at /usr/local/src/php/php-5.5.14-fpm/Zend/zend_API.c:1713
#6  0x000000000082f535 in zend_hash_apply (ht=ht@entry=0x10de680, apply_func=apply_func@entry=0x822f60 <zend_startup_module_ex>) at /usr/local/src/php/php-5.5.14-fpm/Zend/zend_hash.c:716
#7  0x0000000000826f5a in zend_startup_modules () at /usr/local/src/php/php-5.5.14-fpm/Zend/zend_API.c:1886
#8  0x00000000007c0d9e in php_module_startup (sf=<optimized out>, additional_modules=additional_modules@entry=0x10b94e0, num_additional_modules=num_additional_modules@entry=1)
    at /usr/local/src/php/php-5.5.14-fpm/main/main.c:2229
#9  0x00000000008dafe5 in php_cgi_startup (sapi_module=<optimized out>) at /usr/local/src/php/php-5.5.14-fpm/sapi/fpm/fpm/fpm_main.c:856
#10 0x00000000004509f5 in main (argc=1, argv=0x7fffffffe738) at /usr/local/src/php/php-5.5.14-fpm/sapi/fpm/fpm/fpm_main.c:1776
(gdb)