From @skids

Regression​:

(09​:41​:06 PM) skids​: m​: role A { multi method a ($ where { $_.say; $_ ~~ /a/ } ) { "A".say }; }; role B { multi method a ($ where { $_.say; $_ ~~ /b/ } ) { "B".say } }; class C does A does B { }; C.new.a("a");
(09​:41​:07 PM) camelia​: rakudo-moar e360bd​: OUTPUT«===SORRY!=== Error while compiling /tmp/dMwEKoUikS␤Multi method 'a' with signature :(C $​: $ where { ... }, *%_) must be resolved by class C because it exists in multiple roles (B, A)␤at /tmp/dMwEKoUikS​:1␤»
(09​:41​:36 PM) skids​: star​: role A { multi method a ($ where { $_.say; $_ ~~ /a/ } ) { "A".say }; }; role B { multi method a ($ where { $_.say; $_ ~~ /b/ } ) { "B".say } }; class C does A does B { }; C.new.a("a");
(09​:41​:37 PM) camelia​: star-m 2015.09​: OUTPUT«a␤a␤a␤A␤»

Where clauses should prevent multi-methods from conflicting.

From @dwarring

$ 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

From @skids

I have PR'd a fix in PR#​672. Passes all spectests, and fails no tests not already failing on roast/6.c.

From @skids

On Sun Jan 03 15​:23​:33 2016, bri@​abrij.org wrote​:

I have PR'd a fix in PR#​672. Passes all spectests, and fails no tests
not already failing on roast/6.c.

Patch was merged and spectests are now added in S06-multi/value-based.t.

Closing.

@skids - Status changed from 'new' to 'resolved'