[perl #127129] Rakudo confused by multi methods + multiple roles

[via RT]

# New Ticket Created by  David Warring 
# Please include the string:  [perl #127129]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=127129 >


$ cat > tst.pl

role R1 {
    multi method foo(42) {}
    multi method foo(69) {}
}

role R2 { }

class C does R1 does R2 {}

$ perl6 --version
This is Rakudo version 2015.12-72-g3ea4dff built on MoarVM version 2015.12
implementing Perl 6.c.
$ perl6 tst.pl
Multi method 'foo' with signature :(C $: Int $ where { ... }, *%_) must be 
resolved by class C because it exists in multiple roles (R1, R1)
at /home/jachadley/git/perl6-PDF-DOM/tst.pl:8