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Segfault with gc_collect_cycles using unserialize on certain objects https://bugs.php.net/bug.php?id=64896
Program received signal SIGSEGV, Segmentation fault.
_zend_mm_free_int (heap=0xd93290, p=0x7ffff7fc3210) at /home/arjen/php-5.4.15/Zend/zend_alloc.c:2100
2100 if (ZEND_MM_IS_FREE_BLOCK(next_block)) {
(gdb) bt
#0 _zend_mm_free_int (heap=0xd93290, p=0x7ffff7fc3210) at /home/arjen/php-5.4.15/Zend/zend_alloc.c:2100
#1 0x000000000066a2e2 in _zval_dtor (zvalue=<optimized out>) at /home/arjen/php-5.4.15/Zend/zend_variables.h:35
#2 _zval_ptr_dtor (zval_ptr=0x7ffff7fc6178) at /home/arjen/php-5.4.15/Zend/zend_execute_API.c:438
#3 0x0000000000685938 in zend_hash_destroy (ht=0x7ffff7fc60b8) at /home/arjen/php-5.4.15/Zend/zend_hash.c:560
#4 0x0000000000677aa2 in _zval_dtor_func (zvalue=0x7fffffffaa70) at /home/arjen/php-5.4.15/Zend/zend_variables.c:45
#5 0x00000000006e5a60 in zend_assign_to_variable (value=0x7ffff7fc5eb0, variable_ptr_ptr=0x7ffff7f8e410) at /home/arjen/php-5.4.15/Zend/zend_execute.c:937
#6 ZEND_ASSIGN_SPEC_CV_VAR_HANDLER (execute_data=0x7ffff7f8e378) at /home/arjen/php-5.4.15/Zend/zend_vm_execute.h:33084
#7 0x000000000069e3dc in execute (op_array=0x7ffff7fc5580) at /home/arjen/php-5.4.15/Zend/zend_vm_execute.h:410
#8 0x000000000066bf81 in zend_call_function (fci=fci@entry=0x7fffffffacd0, fci_cache=<optimized out>, fci_cache@entry=0x7fffffffaca0) at /home/arjen/php-5.4.15/Zend/zend_execute_API.c:958
#9 0x000000000068e965 in zend_call_method (object_pp=object_pp@entry=0x7fffffffad88, obj_ce=<optimized out>, fn_proxy=fn_proxy@entry=0x7fffffffad80, function_name=function_name@entry=0xa4b927 "__destruct",
function_name_len=function_name_len@entry=10, retval_ptr_ptr=retval_ptr_ptr@entry=0x0, param_count=param_count@entry=0, arg1=arg1@entry=0x0, arg2=arg2@entry=0x0) at /home/arjen/php-5.4.15/Zend/zend_interfaces.c:97
#10 0x0000000000698135 in zend_objects_destroy_object (object=0x7ffff7fc5da8, handle=<optimized out>) at /home/arjen/php-5.4.15/Zend/zend_objects.c:123
#11 0x000000000069619d in gc_collect_cycles () at /home/arjen/php-5.4.15/Zend/zend_gc.c:816
#12 0x0000000000688669 in zif_gc_collect_cycles (ht=<optimized out>, return_value=0x7ffff7fc48d0, return_value_ptr=<optimized out>, this_ptr=<optimized out>, return_value_used=<optimized out>)
at /home/arjen/php-5.4.15/Zend/zend_builtin_functions.c:361
#13 0x000000000071c790 in zend_do_fcall_common_helper_SPEC (execute_data=0x7ffff7f8e060) at /home/arjen/php-5.4.15/Zend/zend_vm_execute.h:643
#14 0x000000000069e3dc in execute (op_array=0x7ffff7fc4cc0) at /home/arjen/php-5.4.15/Zend/zend_vm_execute.h:410
#15 0x0000000000679fde in zend_execute_scripts (type=type@entry=8, retval=retval@entry=0x0, file_count=file_count@entry=3) at /home/arjen/php-5.4.15/Zend/zend.c:1315
#16 0x000000000061d499 in php_execute_script (primary_file=primary_file@entry=0x7fffffffd2a0) at /home/arjen/php-5.4.15/main/main.c:2492
#17 0x000000000071e574 in do_cli (argc=2, argv=0x7fffffffe668) at /home/arjen/php-5.4.15/sapi/cli/php_cli.c:988
#18 0x0000000000425597 in main (argc=2, argv=0x7fffffffe668) at /home/arjen/php-5.4.15/sapi/cli/php_cli.c:1364
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