@main[]
^try{	
	^mustfail[]
}{
	^if($exception.type eq parser.runtime){
		failed, that's OK
		$exception.handled(1)
	}
}

@mustfail[]
$hash[
	$.a[1]
	$.b[2]
]
^hash.foreach[key;value]{
	$hash.c[1]
#	$hash.a[1]
}