This was fixed in (2015-11-18)
https://github.com/rakudo/rakudo/commit/06729d91e6e2d0c96ee700012827677ee518b737
$ perl6 -e 'my Int $a of Str; say "hi"'
===SORRY!=== Error while compiling -e
Str not allowed here; variable list already declared with type Int
at -e:1
--> my Int $a of Str⏏; say "h
# New Ticket Created by Zefram
# Please include the string: [perl #126123]
# in the subject line of all future correspondence about this issue.
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S02 says this will produce a compiler error:
$ ./perl6 -e 'my Int $a of Str; say "hi"'
hi
The
