[perl #130253] [NYI] Coercion type in variable declarations

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# New Ticket Created by  Michael Schaap 
# Please include the string:  [perl #130253]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=130253 >


Coercion type works quite nicely in signatures, e.g.

     sub foo(Int(Cool) $f) {
         say $f.WHAT;
     }
     foo "42";    # (Int)

but it doesn't work yet in variable declarations, e.g.

     my Int(Cool) $x; $x = "42"; # Coercion Int(Cool) is insufficiently 
type-like to qualify a variable


Using Rakudo Star 2016.11:
This is Rakudo version 2016.11 built on MoarVM version 2016.11
implementing Perl 6.c.