[perl #118263] [BUG] LTA error when the signatures of a stubbed method from a role and a class don't match

[via RT]

# New Ticket Created by  Timo Paulssen 
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In this code

role Command {
    method execute { ... }
}

class EchoCommand is Command {
    method execute(Str $echostring) { shell "echo '$echostring'" }
}

gives the following error:

===SORRY!===
Method 'execute' must be implemented by Command because it is required by a role
at foobar.p6:6
------>


It would be cool if it would acknowledge, that there is a message, but the
signatures don't match.