Description:
------------
Problem does not exist in 5.4.9 (windows tested)
Problem exist in 5.5.0 (windows tested)
Problem exist in 5.5.6 & 5.5.7 (ubuntu linux x86 tested)

@see link with code
The code is part of my symfony project (using propel db)
code is generated with propel model generator
(php app/console propel:model:build)
using latest propel 1.x
But symfony and propel are not the problem here.

Valid php should not give a parse error.

to test
- rename file to .php
php <path-to-file>


Test script:
---------------
http://www.densi.com/phpError/BaseCrossRefStockCode.php.txt


Expected result:
----------------
Result on php 5.4.9 and below :

Fatal error: Class 'BaseObject' not found in <path-to-file> on line 37

Actual result:
--------------
result on php >= 5.5.0:

Parse error: syntax error, unexpected 'YIELD' (T_YIELD) in <path-to-file> on line 889