[perl #77184] [BUG] Odd "'self' not found" error when mixing a role (containing a 'my $!foo' declaration) into a class in Rakudo

[Christian Bartolomaeus via RT]

On Mon Oct 10 02:13:12 2011, masak wrote:
> On Sun Oct 09 09:10:12 2011, coke wrote:
> > On Thu Aug 12 14:35:18 2010, masak wrote:
> > > <tylercurtis> rakudo: role A { my $!foo; }; role B { my $!foo; };
> > > class C does A does B; say 'alive';
> > 
> > 12:08 < [Coke]> rakudo: role A { my $!foo; }; role B { my $!foo; };
> > class C
> >                 does A does B; say 'alive';
> > 12:08 <+p6eval> rakudo f6eb61: OUTPUT«===SORRY!===␤Too late for
> > semicolon form
> >                 of $*PKGDECL definition at line 1, near "say 'alive"␤»
> > 
> > 
> > Can you rephrase the code to either still show the issue or show that
> > it's fixed?
> 
> Certainly.
> 
> <masak> rakudo: role A { my $!foo; }; role B { my $!foo; }; class C does 
> A does B {}; say 'alive'
> <p6eval> rakudo f6eb61: OUTPUT«alive␤»
> 
> So, it's fixed now. Marking as needstest.

For the records: Nowadays this fails with X::Syntax::Variable::Twigil:

$ perl6-m -e 'role A { my $!foo; }; role B { my $!foo; }; class C does A does B 
{}; say "alive"'
===SORRY!=== Error while compiling -e
Cannot use ! twigil on my variable
at -e:1
------> role A { my $!foo⏏; }; role B { my $!foo; }; class C does 
    expecting any of:
        constraint

I changed the skipped test in S14-roles/mixin.t to 'throws_like': 
https://github.com/perl6/roast/commit/5cb6bc1eae