From @masak

<masak> rakudo​: .trans("a" => "b") for "a\nb".split("\n"); say "alive"
<p6eval> rakudo 687837​: OUTPUT«too few positional arguments​: 2 passed,
3 (or more) expected [...]
<masak> this one is on file, right? 'cause it's pretty annoying.
<moritz_> no idea
<moritz_> but I know where the tests go :-)
<moritz_> integration/real-strings.t
<masak> rakudo​: (~$_).trans("a" => "b") for "a\nb".split("\n"); say "alive"
<p6eval> rakudo 687837​: OUTPUT«alive␤»
* masak submits rakudobug, Justin Case

From @moritz

Fixed, tests pass (guess where... :), all is well.

The RT System itself - Status changed from 'new' to 'open'

@moritz - Status changed from 'open' to 'resolved'