Description:
------------
Hi!

I'm getting segfaults at random places. The stacktrace I gathered so far is this:

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x00000f780000002d
0x0000000100345623 in zval_mark_grey ()

#0  0x0000000100345623 in zval_mark_grey ()
#1  0x0000000100345644 in zval_mark_grey ()
#2  0x0000000100344986 in gc_collect_cycles ()
#3  0x00000001003445f5 in gc_zval_possible_root ()
#4  0x0000000100336e9d in zend_hash_destroy ()
#5  0x000000010032a0bd in _zval_dtor_func ()
#6  0x00000001000529ae in php_pcre_match_impl ()
#7  0x0000000100055a30 in php_do_pcre_match ()
#8  0x000000010031f341 in dtrace_execute_internal ()
#9  0x0000000100e98037 in xdebug_execute_internal ()
#10 0x000000010038fb0f in zend_do_fcall_common_helper_SPEC ()
#11 0x000000010034cf7c in execute ()
#12 0x000000010031f286 in dtrace_execute ()
#13 0x0000000100e97dba in xdebug_execute ()
#14 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#15 0x000000010034cf7c in execute ()
#16 0x000000010031f286 in dtrace_execute ()
#17 0x0000000100e97dba in xdebug_execute ()
#18 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#19 0x000000010034cf7c in execute ()
#20 0x000000010031f286 in dtrace_execute ()
#21 0x0000000100e97dba in xdebug_execute ()
#22 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#23 0x000000010034cf7c in execute ()
#24 0x000000010031f286 in dtrace_execute ()
#25 0x0000000100e97dba in xdebug_execute ()
#26 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#27 0x000000010034cf7c in execute ()
#28 0x000000010031f286 in dtrace_execute ()
#29 0x0000000100e97dba in xdebug_execute ()
#30 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#31 0x000000010034cf7c in execute ()
#32 0x000000010031f286 in dtrace_execute ()
#33 0x0000000100e97dba in xdebug_execute ()
#34 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#35 0x000000010034cf7c in execute ()
#36 0x000000010031f286 in dtrace_execute ()
#37 0x0000000100e97dba in xdebug_execute ()
#38 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#39 0x000000010034cf7c in execute ()
#40 0x000000010031f286 in dtrace_execute ()
#41 0x0000000100e97dba in xdebug_execute ()
#42 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#43 0x000000010034cf7c in execute ()
#44 0x000000010031f286 in dtrace_execute ()
#45 0x0000000100e97dba in xdebug_execute ()
#46 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#47 0x000000010034cf7c in execute ()
#48 0x000000010031f286 in dtrace_execute ()
#49 0x0000000100e97dba in xdebug_execute ()
#50 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#51 0x000000010034cf7c in execute ()
#52 0x000000010031f286 in dtrace_execute ()
#53 0x0000000100e97dba in xdebug_execute ()
#54 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#55 0x000000010034cf7c in execute ()
#56 0x000000010031f286 in dtrace_execute ()
#57 0x0000000100e97dba in xdebug_execute ()
#58 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#59 0x000000010034cf7c in execute ()
#60 0x000000010031f286 in dtrace_execute ()
#61 0x0000000100e97dba in xdebug_execute ()
#62 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#63 0x000000010034cf7c in execute ()
#64 0x000000010031f286 in dtrace_execute ()
#65 0x0000000100e97dba in xdebug_execute ()
#66 0x000000010038fc34 in zend_do_fcall_common_helper_SPEC ()
#67 0x000000010034cf7c in execute ()
#68 0x000000010031f286 in dtrace_execute ()
#69 0x0000000100e97dba in xdebug_execute ()
#70 0x000000010032c570 in zend_execute_scripts ()
#71 0x00000001002db63b in php_execute_script ()
#72 0x00000001003addfd in do_cli ()
#73 0x00000001003ad26f in main ()

The problem occurs all over the place in different situations. Remove xdebug, problem goes away.. start mysql.. problem comes back.. change a file, problem is somewhere else.

So I understand this is pretty vague


Test script:
---------------
Unfortunately I cannot create a simple testcase, as the location of the error alternates, and doesn't appear in simple scripts. I would be more than happy to give you more details though, Just need to know where and what to do..

Expected result:
----------------
No segfault

Actual result:
--------------
A segfault