eaccelerator_get bug

[roaxiaolong]

Hi

recently I have encountered a problem when use eaccelerator_get, this
function will lead core dump when concurrent get/post. after read the
source file, I think it's occur because function release the rw_lock
earlier。

In eaccelerator_get,after get key data from shared memory, the
programme call restore_zval copy shared memory ata to return_value.
but if another process call eaccelerator_put this time and free the
pre value，restore_zval will be access a free memory and lead core
dump。

my php code like this
<?php
eaccelerator_get("key");
eaccelerator_put("key",$str);
?>

when run the code 400 request per second, sometimes php will be core
dump。