[perl #62966] Rakudo reports a type mismatch in assignment when typing an attribute with a role

[Carl Mäsak]

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With Rakudo 153a4a8 on Parrot r36239, I get the following:

$ perl6 -e 'role A {}; class B { has A $!a }; B.new'
Type mismatch in assignment.
[...]

I see nothing wrong with the above, so I don't think the error is justified.