From @coke

Marked as a nom regression, this test in S05-mass/rx.t is skipped

ok 'abcdef' !~~ /<-[dcb]>**{3}/, 'repeated negated character class';

19​:47 <[Coke]> m​: 'abcdef' !~~ /<-[dcb]>**{3}/
19​:47 <camelia> rakudo-moar b2b333​: OUTPUT«===SORRY!=== Error while
compiling
  /tmp/q0NOu24d8E␤Block case of ** quantifier not yet
  implemented␤at /tmp/q0NOu24d8E​:1␤------> 'abcdef' !~~
  /<-[dcb]>**⏏{3}/␤ expecting any of​:␤ postfix␤
  i…»

--
Will "Coke" Coleda

From @FROGGS

Patch in NQP that implements the basics (grammar and actions) as well as the code-gen for MoarVM​:
Raku/nqp@608ff67edd

Little adjustments to allow Ranges in rakudo​:
rakudo/rakudo@b9be98c41d

All related spectests in t/spec/S05-metasyntax/repeat.t and t/spec/S05-mass/rx.t pass with this patch on maor. Parrot and JVM are following.

The RT System itself - Status changed from 'new' to 'open'

From @FROGGS

Implemented now on all backends.

Tests are here​: Raku/roast@d90cfb61f0

@FROGGS - Status changed from 'open' to 'resolved'