[perl #126291] [BUG] :D on attrs and vars fails with a defined default value

[via RT]

# New Ticket Created by  Larry Wall 
# Please include the string:  [perl #126291]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=126291 >


22:28 < TimToady> m: say  class { has Int:D $.foo is default(0) }.new
22:29 <+camelia> rakudo-moar 472ea0: OUTPUT«===SORRY!=== Error while
compiling /tmp/WV7JjqRYN7␤Variable definition of type Int:D requires an
                 initializer␤at /tmp/WV7JjqRYN7:1␤------>   class { has
Int:D $.foo is default(0) ⏏}.new␤    expecting any of:␤
                 constraint␤»
22:29 < TimToady> I don't think that one should require an initializer
22:29 -!- coetry [~al...@c-50-171-35-243.hsd1.tx.comcast.net] has quit
[Quit: Lost terminal]
22:29 -!- allen [~al...@c-50-171-35-243.hsd1.tx.comcast.net] has quit
[Quit: Lost terminal]
22:30 < TimToady> m: my Int:D $x is default(0);
22:30 <+camelia> rakudo-moar 472ea0: OUTPUT«===SORRY!=== Error while
compiling /tmp/p5BBLy48x8␤Default value '0' will never bind to a
                 parameter of type Int:D␤at /tmp/p5BBLy48x8:1␤------> my
Int:D $x is default(0)⏏;␤    expecting any of:␤        constraint␤»
22:30 < TimToady> say wot?
22:31 < TimToady> is that one bug or two?
22:32 < TimToady> m: my Int:D @array is default(0); @array[0] = Nil;
22:32 <+camelia> rakudo-moar 472ea0: OUTPUT«===SORRY!=== Error while
compiling /tmp/MpVmByHAQM␤Default value '0' will never bind to a
                 parameter of type Array[Int:D]␤at
/tmp/MpVmByHAQM:1␤------> my Int:D @array is default(0)⏏; @array[0] =
Nil;␤    expecting
                 any of:␤        co…»
22:33 < TimToady> two and a half?