Buggeration.

#0  0x00007fffe7657612 in ?? () from /lib64/libuuid.so.1
#1  0x00007fffe6e06ac6 in ?? () from /usr/lib64/libgearman.so.8
#2  0x00007fffe6df7d4e in ?? () from /usr/lib64/libgearman.so.8
#3  0x00007fffe6df9911 in ?? () from /usr/lib64/libgearman.so.8
#4  0x00007fffe6df9c44 in gearman_client_do_background () from /usr/lib64/libgearman.so.8
#5  0x00007fffe702840e in zif_gearman_client_do_background (ht=<value optimized out>, return_value=0x7ffff7fd0e98,
    return_value_ptr=<value optimized out>, this_ptr=<value optimized out>, return_value_used=<value optimized out>, tsrm_ls=0xfb1ad0)
    at /tmp/gearman/gearman-1.1.2/php_gearman.c:2140
#6  0x00007fffea333ba3 in xdebug_execute_internal (current_execute_data=0x7ffff7f9c0a0, fci=0x0, return_value_used=1, tsrm_ls=0xfb1ad0)
    at /tmp/xdebug/xdebug-2.2.3/xdebug.c:1553
#7  0x00000000007d8801 in zend_do_fcall_common_helper_SPEC (execute_data=<value optimized out>, tsrm_ls=<value optimized out>)
    at /temp/php-src/php-5.5.1/Zend/zend_vm_execute.h:545
#8  0x00000000007c8b4b in execute_ex (execute_data=0x7ffff7f9c0a0, tsrm_ls=0xfb1ad0) at /temp/php-src/php-5.5.1/Zend/zend_vm_execute.h:356
#9  0x00007fffea3340af in xdebug_execute_ex (execute_data=0x7ffff7f9c0a0, tsrm_ls=<value optimized out>)
    at /tmp/xdebug/xdebug-2.2.3/xdebug.c:1437
#10 0x0000000000748af7 in zend_execute_scripts (type=8, tsrm_ls=0xfb1ad0, retval=0x0, file_count=3)
    at /temp/php-src/php-5.5.1/Zend/zend.c:1316
#11 0x00000000006dda8b in php_execute_script (primary_file=0x7fffffffe2e0, tsrm_ls=0xfb1ad0) at /temp/php-src/php-5.5.1/main/main.c:2484
#12 0x000000000080af64 in do_cli (argc=2, argv=0xfb19f0, tsrm_ls=0xfb1ad0) at /temp/php-src/php-5.5.1/sapi/cli/php_cli.c:994
#13 0x000000000080b7ed in main (argc=2, argv=0xfb19f0) at /temp/php-src/php-5.5.1/sapi/cli/php_cli.c:1378