/usr/bin/php5:11:gc_zval_possible_root:zend_hash_destroy:zend_object_std_dtor:zend_objects_free_object_storage:zend_objects_store_del_ref_by_handle_ex

The Ubuntu Error Tracker has been receiving reports about a problem regarding php5. This problem was most recently seen with version 5.5.4+dfsg-1+debphp.org~precise+1+a22+3, the problem page at https://errors.ubuntu.com/problem/57e4749ce1a6da0ff464c3e2c649682d929e848e contains more details.

Stack trace:
#0 0x00000000006b7f59 in gc_zval_possible_root (zv=0x434f898)
    at /build/buildd/php5-5.3.10/Zend/zend_gc.c:143
#1 0x00000000006a7c60 in zend_hash_destroy (ht=0x761a408)
    at /build/buildd/php5-5.3.10/Zend/zend_hash.c:729
#2 0x00000000006bb439 in zend_object_std_dtor (object=0x761a848)
    at /build/buildd/php5-5.3.10/Zend/zend_objects.c:45
#3 0x00000000006bb459 in zend_objects_free_object_storage (object=0x761a848)
    at /build/buildd/php5-5.3.10/Zend/zend_objects.c:126
#4 0x00000000006bf43f in zend_objects_store_del_ref_by_handle_ex (
    handle=97915344, handlers=0xd830ae089596a3f)
    at /build/buildd/php5-5.3.10/Zend/zend_objects_API.c:220
#5 0x00000000006b7d8f in gc_collect_cycles ()
    at /build/buildd/php5-5.3.10/Zend/zend_gc.c:703
#6 0x00000000006b7e82 in gc_zobj_possible_root (zv=0x434f898)
    at /build/buildd/php5-5.3.10/Zend/zend_gc.c:221
#7 0x00000000006c420f in zend_leave_helper_SPEC (execute_data=0x1d50070)
    at /build/buildd/php5-5.3.10/Zend/zend_vm_execute.h:233
#8 0x00000000006c01ab in execute (op_array=0x1ce3ae8)
    at /build/buildd/php5-5.3.10/Zend/zend_vm_execute.h:107
#9 0x000000000068d6ec in zend_call_function (fci=0x7fff6f055760, fci_cache=0x0)
    at /build/buildd/php5-5.3.10/Zend/zend_execute_API.c:969
#10 0x00000000006b0847 in zend_call_method (object_pp=0x7fff6f055888,
    obj_ce=0x1d07d48, fn_proxy=0x7fff6f055880,
    function_name=0xabf6fd "__destruct", function_name_len=-1983454321,
    retval_ptr_ptr=0x0, param_count=7058290, arg1=0x0, arg2=0x0)
    at /build/buildd/php5-5.3.10/Zend/zend_interfaces.c:97
#11 0x00000000006bb372 in zend_objects_destroy_object (object=0x3cc5708,
    handle=1862621320) at /build/buildd/php5-5.3.10/Zend/zend_objects.c:112
#12 0x00000000006beebd in zend_objects_store_call_destructors (objects=0xde7e98)
    at /build/buildd/php5-5.3.10/Zend/zend_objects_API.c:57
#13 0x000000000068bd2d in shutdown_destructors ()
    at /build/buildd/php5-5.3.10/Zend/zend_execute_API.c:228
#14 0x0000000000699fa7 in zend_call_destructors ()
    at /build/buildd/php5-5.3.10/Zend/zend.c:947
#15 0x0000000000646efd in php_request_shutdown (dummy=0x434f898)
    at /build/buildd/php5-5.3.10/main/main.c:1618
#16 0x000000000042b71c in main (argc=35604872, argv=0x21f5928)
    at /build/buildd/php5-5.3.10/sapi/fpm/fpm/fpm_main.c:1913