Fixed with https://github.com/rakudo/rakudo/commit/8eebf0f28f , tests needed.
> On 3 Mar 2017, at 14:33, Sam S. (via RT) <perl6-bugs-follo...@perl.org> wrote: > > # New Ticket Created by Sam S. > # Please include the string: [perl #130906] > # in the subject line of all future correspondence about this issue. > # <URL: https://rt.perl.org/Ticket/Display.html?id=130906 > > > > ➜ say [=>] (1, 2).Seq; > P6opaque: no such attribute '$!reified' in type List when trying > to get a value > > Expected output: > > 1 => 2 > > This used to work correctly until a recent commit: > > https://gist.github.com/Whateverable/4e4a3cfd591978358e188efda98113fa > > https://github.com/rakudo/rakudo/commit/60a8f9e7151825bcd1d4ab829ef78bebc359cbdb