foreach with filelist causes fatal error

[AKhrulev]

Versions: both 2.16.1 and phing-3.0.0-alpha2
PHP versions: tested on 7.2, 5.6 (on 5.6 error does not interrupt execution)
Steps:

1. create two files in same folder

build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="TestBug" default="build" >
	<target name="build" depends="" >
		<foreach param="build.type" target="T1">
			<filelist listfile="list.txt"/>
		</foreach>
	</target>
	<target name = "T1" depends="" >
		<echo message = "In target T1" />
	</target>
</project>

list.txt

foobar

2. Launch build.xml in Phing

Actual result: Fatal error

Argument 2 passed to ForeachTask::process() must be an instance of PhingFile, null given, called in phar://D:/var/bin/phing-3.0.0-alpha2.phar/classes/phing/tasks/system/ForeachTask.php on line 181

[mrook]

Confirmed.

[mrook]

This is caused by filelist expecting a dir attribute to be filled, but it's not actively checked or enforced. I'll see how we can improve that :-)