Description:
------------
This leaks, and it was uncovered by master's AST dumper test: Zend/tests/assert/expect_015.php 


Test script:
---------------
function test() {
  class B {
    use T1, T2 {
        T1::foo insteadof T2;
    }
  }
}

echo "DONE\n";

Expected result:
----------------
No leak

Actual result:
--------------
[Wed Mar  4 02:05:32 2015]  Script:  '/Users/reeze/015.php'
Zend/zend_language_scanner.l(1913) :  Freeing 0x10672F010 (3 bytes), script=/Users/reeze/015.php
=== Total 1 memory leaks detected ===