a open function error stops program

[Gerd Pokorra]

There is a problem with the Rakudo "open" function. A else tree will
never be executed if the open fails. Here is the output from executing
the code snippet:

[gz...@vgerd2 IO]$ ./open_report.p6 
Unable to open filehandle from path '/sdfasfda/asfda/asdfa/Ausgabe.txt'
in Main (file <unknown>, line <unknown>)
[gz...@vgerd2 IO]$


code snippet:

my $filename = '/sdfasfda/asfda/asdfa/Ausgabe.txt';

if my $fh = open($filename, :w) {
    for 1..6 -> $num {
        $fh.print("$num"); $fh.say('. Zeile');
    }
}
else {
    # this else-tree will never be executed because the program stops
    # if the open fails
    $*ERR.say( "Could not open '$filename'" );
}