From liukan@360.cn

17​:58 < kanl> is Set no longer extendable?
17​:58 < kanl> m​: class Foo is Set { method foo( $foo ) { self{$foo} = True;
  self } }; my $f = Foo.new.foo​: 'a'; $f.say;
17​:58 <+camelia> rakudo-moar 533d1a​: OUTPUT«Method 'BUILD' not found for
  invocant of class 'Foo'â�¤ in block <unit> at
  /tmp/75lUH25_wJ​:1â�¤â�¤Â»
18​:17 < jnthn> kanl​: I think it's a bug that you can't inherit from Set.

From @lizmat

On 14 Jul 2015, at 03​:24, å��å�� (via RT) <perl6-bugs-followup@​perl.org> wrote​:

# New Ticket Created by ��
# Please include the string​: [perl #​125611]
# in the subject line of all future correspondence about this issue.
# <URL​: https://rt-archive.perl.org/perl6/Ticket/Display.html?id=125611 >

17​:58 < kanl> is Set no longer extendable?
17​:58 < kanl> m​: class Foo is Set { method foo( $foo ) { self{$foo} = True;
self } }; my $f = Foo.new.foo​: 'a'; $f.say;
17​:58 <+camelia> rakudo-moar 533d1a​: OUTPUT«Method 'BUILD' not found for
invocant of class 'Foo'� in block <unit> at
/tmp/75lUH25_wJ​:1â�¤â�¤Â»
18​:17 < jnthn> kanl​: I think it's a bug that you can't inherit from Set.

1. Fixed with b6fae27eceb094d5739f9 .

2. I think it should be �is SetHash� if you want to be able to change it after it has been created. It�s another error that the assignment failure is not caught. This was fixed with dd3bcc46ccf1eeb5938131dc .

Closable with tests.

Liz

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

From @usev6

Tests were added with commits f94e52b4, bb2d247c and 235a8c93.

I'm closing this ticket as 'resolved'.

@usev6 - Status changed from 'open' to 'resolved'