From @masak

<masak> rakudo​: role A { method x {} }; role B { method x {} }; class
C does A does B {}
<p6eval> rakudo 70667a​: OUTPUT«Null PMC access in elements() [...]
* masak submits rakudobug

From @bbkr

On Kiev build

$ perl6 -e 'role A { method x {} }; role B { method x {} }; class C does
A does B {}'
===SORRY!===
Method 'x' collides and a resolution must be provided by the class

Adding tests...

The RT System itself - Status changed from 'new' to 'open'

From @bbkr

tests added in S14-roles/composition.t

@bbkr - Status changed from 'open' to 'resolved'

From @kyleha

This is an automatically generated mail to inform you that tests are now available in t/spec/S14-roles/composition.t

commit 4ed0890c3ab73914cd23c087304be9ac37e09268
Author​: bbkr <bbkr@​c213334d-75ef-0310-aa23-eaa082d1ae64>
Date​: Mon Jun 28 22​:33​:37 2010 +0000

  [t/spec] tests for RT #​72856 Null PMC access when two methods from different roles collide in a class composition in Rakudo
 
  git-svn-id​: http://svn.pugscode.org/pugs@&#8203;31492 c213334d-75ef-0310-aa23-eaa082d1ae64

diff --git a/t/spec/S14-roles/composition.t b/t/spec/S14-roles/composition.t
index ca5b4cc..73850b7 100644
--- a/t/spec/S14-roles/composition.t
+++ b/t/spec/S14-roles/composition.t
@@ -1,6 +1,6 @@
 use v6;
 use Test;
-plan 22;
+plan 23;
 
 # L<S14/Roles/"Roles may be composed into a class at compile time">
 
@@ -107,6 +107,14 @@ ok rB !~~ RT64002, 'role not matched by second role it does';
 
 }
 
+# RT #72856
+{
+    role RT72856A { method foo {} };
+    role RT72856B { method foo {} };
+    eval 'class RT72856C does RT72856A does RT72856B {}';
+    ok $! ~~ /foo .* collides/,
+        'method of the same name from two different roles collide in a class composition';
+}
 
 done_testing;
 

From @coke

On Mon Jun 28 15​:34​:12 2010, bbkr wrote​:

tests added in S14-roles/composition.t

Regressed in nom. Re-opening ticket.

--
Will "Coke" Coleda

@coke - Status changed from 'resolved' to 'open'

From @moritz

works again, tests pass

@moritz - Status changed from 'open' to 'resolved'