[perl #132283] [REGRESSION] BUILDALL is listed as one of the methods, maybe that's not right (say $foo.^methods)

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# New Ticket Created by  Aleks-Daniel Jakimenko-Aleksejev 
# Please include the string:  [perl #132283]
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Code:
class Foo { has $.bar }; my $f = Foo.new(bar=>'u'); say $f.^methods;

¦«2015.12»:
(bar)

¦«2016.06»:
(bar)

¦«2016.12»:
(bar)

¦«2017.06»:
(bar)

¦«f72be0f130cf»:
(bar BUILDALL)



Bisectable points at two relevant commits:
First it was BUILDALL_UNDER_CONSTRUCTION after 
https://github.com/rakudo/rakudo/commit/9837687d93c907ec232b1c7635776aa0c7faa6bc
Now it is BUILDALL after 
https://github.com/rakudo/rakudo/commit/63cf246fd4caa43c52a212054a98e9b450c54127


I don't know if BUILDALL should be listed or not. My gut feeling says that it 
shouldn't be, but feel free to argue otherwise. I'm just the messenger.