Parsing Nothing

In Git::Config I made the assumption that when there is nothing to parse there is nothing to do. The code looked as follows.

my $parsed = Config.parse($cfg-text);

for $parsed.Hash<section>.list -> $section {
    # [...]
}

A recent change in Rakudo broke that assumption. Parsing an empty file with a grammar that isn’t prepared to return nothing will return Failure instead of Nil now. As it turns out for doesn’t like to loop over an instance of Failure. There is an easy fix because Failures are undefined.

my $parsed = Config.parse($cfg-text) // [];

For your use cases it may make more sense to use // Nil instead to get the old behaviour back. In any case I would like to ask you check your modules for assumptions reguarding .parse or help travis to help you.