Symfony 1.4 segfaulting Apache on php-pecl-memcache 3.0.8

Hi guys, I've got a coredump of apache running with mod_php. This is backtrace: (gdb) bt #0 mmc_pool_select (pool=0x7fa0473d4600) at /usr/src/debug/php-pecl-memcache-3.0.8/NTS/memcache_pool.c:1422 #1 0x00007fa03091bcb8 in mmc_pool_run (pool=0x7fa0473d4600) at /usr/src/debug/php-pecl-memcache-3.0.8/NTS/memcache_pool.c:1674 #2 0x00007fa030915883 in zif_memcache_get (ht=<value optimized out>, return_value=<value optimized out>, return_value_ptr=<value optimized out>, this_ptr=<value optimized out>,

    return_value_used=<value optimized out>) at /usr/src/debug/php-pecl-memcache-3.0.8/NTS/memcache.c:1687
#3  0x00007fa03d28a74c in xdebug_handle_hit_value@plt () from /usr/lib64/php/modules/xdebug.so

#4 0x00007fa04753db10 in ?? () #5 0x000000004753db10 in ?? () #6 0x0000000000000000 in ?? () (gdb) print (char *)executor_globals.active_op_array->function_name $16 = 0x7fa02899a668 "get" (gdb) print (char *)executor_globals.active_op_array->filename $17 = 0x7fa028997460 "/home/dev/site-php56/vendor/symfony/symfony1/lib/cache/sfMemcacheCache.class.php" (gdb) quit This the PHP function which triggers the error: /** * @see sfCache */ public function get($key, $default = null) {

    $value = $this->memcache->get($this->getOption('prefix').$key);

    return false === $value ? $default : $value;

} Did anyone experience similar errors? Do you have any suggestions how to proceed? Just a quick sidenote - everything works perfectly with php 5.4 and same version of memcache module...