[perl #130200] [LTA] Error when attempting to use a package that has one of core namespaces in its name

[Zoffix Znet via RT]

On Wed, 27 Dec 2017 05:17:34 -0800, c...@zoffix.com wrote:
> On Mon, 28 Nov 2016 05:41:48 -0800, c...@zoffix.com wrote:
> > On Mon, 28 Nov 2016 05:38:23 -0800, c...@zoffix.com wrote:
> > > The error is even weirder here:
> > >
> > > m: package IO::Foo { }; use IO::Foo
> > > rakudo-moar 054aca: OUTPUT«===SORRY!===␤»
> >
> > Oh, that one was just a glitch in camelia. The error is the same for
> > IO:: as for Attribute::
> >
> > m: package IO::Foo { }; use IO::Foo
> > rakudo-moar 054aca: OUTPUT«===SORRY!===␤IO::Foo is a builtin type,
> > not
> > an external module␤»
> 
> One more issue in this bunch, caused by presence of `role X` and
> invalid method call:
> 
> $ perl6 -e 'class Foo { role X {}; method z { Foo!z } }'
> ===SORRY!===
> Could not locate compile-time value for symbol Method::NotFound


    $ perl6 -v
    This is Rakudo version 2017.12-11-g2a8287c built on MoarVM version 
2017.12-1-g912f967
    implementing Perl 6.c.

    $ cat Foo.pm6 
    unit class Foo;
    class Z::Bar {}
    class X::Meow {}

    $ perl6 -I. -MFoo -e 'say Foo::Z::Bar; say Foo::X::Meow'
    (Bar)
    Could not find symbol '&Meow'
      in block <unit> at -e line 1

    $ pico Foo.pm6 ...

    $ cat Foo.pm6 
    unit class Foo;
    class Foo::Z::Bar {}
    class Foo::X::Meow {}

    $ perl6 -I. -MFoo -e 'say Foo::Z::Bar; say Foo::X::Meow'
    (Bar)
    (Meow)


Another related case. Namespace of inner class begins with core namespace is 
not found, but with class's namespace then found.