[perl #67768] [BUG] Very unhelpful error message for declaring a role with a name already assigned to a class

[Carl Mäsak via RT]

On Tue Jul 21 17:05:56 2009, hud...@walttollefson.com wrote:
> <hudnix>rakudo: role List {method foo{1}}
> 
> <p6eval>rakudo 3b1bda: OUTPUT«Method '!add_variant' not found for invocant
> of class ”␤»
> 
> My first rakudobug...

Declaring an existing class as a role seems to be the culprit here.

<masak> rakudo: role List {}
<p6eval> rakudo 5901f2: OUTPUT«Method '!add_variant' not found for
invocant of class ''␤»
<masak> rakudo: role Associative {}
<p6eval> rakudo 5901f2:  ( no output )
<jnthn> rakudo: class List { }
<p6eval> rakudo 5901f2: OUTPUT«Re-declaration of type List at line 2,
near "" [...]