What about this commit? https://github.com/rakudo/rakudo/commit/0704cd97226e63001943426666c88cef1c5fe711
On 2017-09-12 13:55:51, david.warring wrote: > current behavior of isa method on a subset: > > % perl6 -v > This is Rakudo version 2017.08-110-g5f3350656 built on MoarVM version > 2017.08.1-156-g4 > 9b90b99 > implementing Perl 6.c. > % perl6 -e'subset S of Int; say S.isa(Int)' > Cannot resolve caller isa(Perl6::Metamodel::SubsetHOW: S, Int); none of > these signatur > es match: > (Mu \SELF: Mu $type, *%_) > (Mu \SELF: Str:D $name, *%_) > in block <unit> at -e line 1 > > The documentation https://docs.perl6.org/routine/isa implies this should > return True.