From @AlexDaniel

Code​:
role A { };
role B does A { };
B.new.^roles.say;

Result​:
(B)

As skids points out, the expected result should be "(A) (B)" or "(B​::A)
(B)".

This bug was found by ChoHag. See IRC log​:
http://irclog.perlgeek.de/perl6/2015-07-31#i_10985350

From @AlexDaniel

Also see a follow-up discussion​:
http://irclog.perlgeek.de/perl6/2015-07-31#i_10986122

On Fri, Jul 31, 2015 at 11​:09 PM, perl6 via RT <perl6-bugs-followup@​perl.org

wrote​:

Greetings,

This message has been automatically generated in response to the
creation of a trouble ticket regarding​:
"^roles does not always list all of the roles",
a summary of which appears below.

There is no need to reply to this message right now. Your ticket has been
assigned an ID of [perl #​125731].

Please include the string​:

     \[perl #​125731\]

in the subject line of all future correspondence about this issue. To do
so,
you may reply to this message.

                    Thank you,
                    perl6\-bugs\-followup@​perl\.org

-------------------------------------------------------------------------
Code​:
role A { };
role B does A { };
B.new.^roles.say;

Result​:
(B)

As skids points out, the expected result should be "(A) (B)" or "(B​::A)
(B)".

This bug was found by ChoHag. See IRC log​:
http://irclog.perlgeek.de/perl6/2015-07-31#i_10985350

From @jnthn

On Fri Jul 31 13​:09​:04 2015, alex.jakimenko@​gmail.com wrote​:

Code​:
role A { };
role B does A { };
B.new.^roles.say;

Result​:
(B)

As skids points out, the expected result should be "(A) (B)" or "(B​::A)
(B)".

We used to, by default, give the non-transitive view of the done roles. I've now changed the default to give the (more commonly expected) flattened view, so now the example gives​:

((B) (A))

Discovered and fixed a bug in .^roles(​:transitive) too, while changing the default.

Tests covering this ticket, plus some new ones, in S12-introspection/roles.t.

/jnthn

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

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