Description:
------------
We are facing a segfault using php-fpm while using a webmail (roundcube) with lots of parallels requests

our tests were based on 5.4.24. we have the same issue using the old mod_php

php5-fpm[8304]: segfault at 648 ip 00000000006c1065 sp 00007fff95d084c0 error 4 in php5-fpm[400000+6ff000]

gbd back trace:

#0  0x00000000006c1065 in zend_std_get_properties (object=0x2262d88) at /home/package/php/Zend/zend_object_handlers.c:108

warning: Source file is more recent than executable.
108             zobj = Z_OBJ_P(object);
(gdb) bt
#0  0x00000000006c1065 in zend_std_get_properties (object=0x2262d88) at /home/package/php/Zend/zend_object_handlers.c:108
#1  0x0000000000613c59 in userfilter_filter (stream=0x1fe9d98, thisfilter=0x22165a8, buckets_in=0x3d00fee7300, buckets_out=0x3d00fee7310, bytes_consumed=0x3d00fee72f8, flags=2)
    at /home/package/php/ext/standard/user_filters.c:183
#2  0x00000000006545b5 in _php_stream_write_filtered (stream=0x1fe9d98, buf=0x22165a8 "\320", <incomplete sequence \332>, count=14437312, flags=2) at /home/package/php/main/streams/streams.c:1176
#3  0x0000000000655c2c in _php_stream_flush (stream=0x1fe9d98, closing=35743144) at /home/package/php/main/streams/streams.c:1225
#4  0x0000000000657a1e in _php_stream_free (stream=0x1fe9d98, close_options=11) at /home/package/php/main/streams/streams.c:460
#5  0x0000000000658141 in stream_resource_regular_dtor (rsrc=0x2262d88) at /home/package/php/main/streams/streams.c:1615
#6  0x00000000006ae39e in list_entry_destructor (ptr=0x2209838) at /home/package/php/Zend/zend_list.c:183
#7  0x00000000006aac85 in zend_hash_apply_deleter () at /home/package/php/Zend/zend_hash.c:650
#8  0x00000000006ac478 in zend_hash_graceful_reverse_destroy (ht=0xdc4e50) at /home/package/php/Zend/zend_hash.c:687
#9  0x000000000069e0dc in zend_deactivate () at /home/package/php/Zend/zend.c:947
#10 0x000000000063d82a in php_request_shutdown (dummy=0x2262d88) at /home/package/php/main/main.c:1786
#11 0x000000000043178f in main (argc=-1644962728, argv=0xdc46a0) at /home/package/php/sapi/fpm/fpm/fpm_main.c:1925
(gdb) list
103     /* }}} */
104
105     ZEND_API HashTable *zend_std_get_properties(zval *object TSRMLS_DC) /* {{{ */
106     {
107             zend_object *zobj;
108             zobj = Z_OBJ_P(object);
109             if (!zobj->properties) {
110                     rebuild_object_properties(zobj);
111             }
112             return zobj->properties;