Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves. 

A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external 
resources such as databases, etc. If the script requires a 
database to demonstrate the issue, please make sure it creates 
all necessary tables, stored procedures etc.

Please avoid embedding huge scripts into the report.

I can't reproduce some problem.

<?php

trait example_trait {
    public function example_method($example_paramter = 1) {
        echo $example_paramter;
    }
}

class foo {
	use example_trait;
}

$x = new foo;
$x->example_method();

Apologies for not providing a better code snippet. Here's one you can try out of the box. When I uncomment the IF block, the script will hang. But if I have it commented out, like in the example below, the script works.

<?php

trait testTrait {
	public function testMethod() {
		//if (1) {
			$letters1 = range('a', 'z', 1);
			$letters2 = range('A', 'Z', 1);
			var_dump($letters1);
			var_dump($letters2);
		//}
	}
}

class foo {
	use testTrait;
}

$x = new foo;
$x->testMethod();
?>

------------
The script works both ways in php 5.4.0alpha2. Let me know if you need any other feedback!

This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.

 For Windows:

http://windows.php.net/snapshots/
 
Thank you for the report, and for helping us make PHP better.

Fixed per SVN rev 314933.