From @lizmat

[19​:22​:03] <lizmat> m​: role R { has int

$!a }; class A does R { method a() { $

$!a }; class A does R { method a() { $

From @AlexDaniel

Still reproducible (2017.11,HEAD(e5b660e))

On 2015-09-20 10​:34​:34, elizabeth wrote​:

[19​:22​:03] <lizmat> m​: role R { has int $!a }; class A does R {
method a() { $!a = 42 } }; say A.new.a # sigh
[19​:22​:03] <+camelia> rakudo-moar 97e47a​: OUTPUT«Cannot assign to an
immutable value␤ in method a at /tmp/xjfoxVcXDh​:1␤ in block <unit>
at /tmp/xjfoxVcXDh​:1␤␤»
[19​:22​:25] <lizmat> m​: role R { has Int $!a }; class A does R {
method a() { $!a = 42 } }; say A.new.a # works fine if it is not a
native
[19​:22​:25] <+camelia> rakudo-moar 97e47a​: OUTPUT«42␤»

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