JVM backtrace

+++ Compiling      blib/CORE.d.setting.jar
The following step can take a long time, please be patient.
Cannot have attributes on an array representation
  in compose_repr (gen/jvm/Metamodel.nqp:2978)
  in compose (gen/jvm/Metamodel.nqp:5786)
  in <anon> (gen/jvm/World.nqp:3451)
  in <anon> (gen/jvm/World.nqp:5801)
  in ex-handle (gen/jvm/World.nqp:5799)
  in pkg_compose (gen/jvm/World.nqp:3451)
  in package_def (gen/jvm/Actions.nqp:3430)
  in !reduce (gen/jvm/stage2/QRegex.nqp:2147)
  in !cursor_pass (gen/jvm/stage2/QRegex.nqp:2055)
  in package_def (gen/jvm/Grammar.nqp:2238)
  in package_declarator:sym<class> (gen/jvm/Grammar.nqp)
  in !protoregex (gen/jvm/stage2/QRegex.nqp:2194)
  in package_declarator (gen/jvm/Grammar.nqp)
  in scoped (gen/jvm/Grammar.nqp:2327)
  in scope_declarator:sym<my> (gen/jvm/Grammar.nqp)
  in !protoregex (gen/jvm/stage2/QRegex.nqp:2194)
  in scope_declarator (gen/jvm/Grammar.nqp)
  in term:sym<scope_declarator> (gen/jvm/Grammar.nqp)
  in !protoregex (gen/jvm/stage2/QRegex.nqp:2194)
  in term (gen/jvm/Grammar.nqp)
  in termish (gen/jvm/Grammar.nqp:3754)
  in EXPR (gen/jvm/stage2/NQPHLL.nqp:538)
  in EXPR (gen/jvm/Grammar.nqp:3801)
  in statement (gen/jvm/Grammar.nqp:970)
  in statementlist (gen/jvm/Grammar.nqp:898)
  in LANG (gen/jvm/stage2/NQPHLL.nqp:767)
  in FOREIGN_LANG (gen/jvm/Grammar.nqp:1348)
  in comp_unit (gen/jvm/Grammar.nqp:846)
  in TOP (gen/jvm/Grammar.nqp:560)
  in parse (gen/jvm/stage2/QRegex.nqp:2958)
  in parse (gen/jvm/stage2/NQPHLL.nqp:1572)
  in execute_stage (gen/jvm/stage2/NQPHLL.nqp:1487)
  in run (gen/jvm/stage2/NQPHLL.nqp:1523)
  in <anon> (gen/jvm/stage2/NQPHLL.nqp:1526)
  in compile (gen/jvm/stage2/NQPHLL.nqp:1518)
  in eval (gen/jvm/stage2/NQPHLL.nqp:1188)
  in evalfiles (gen/jvm/stage2/NQPHLL.nqp:1463)
  in command_eval (gen/jvm/stage2/NQPHLL.nqp:1353)
  in command_eval (gen/jvm/Compiler.nqp:234)
  in command_line (gen/jvm/stage2/NQPHLL.nqp:1311)
  in MAIN (gen/jvm/rakudo.nqp:151)
  in <mainline> (gen/jvm/rakudo.nqp:130)
  in <anon> (gen/jvm/rakudo.nqp)

self.name: Rakudo::Internals::ReactAwaitable
self: Perl6::Metamodel::ClassHOW<777920819>
Method 'name' not found for invocant of class 'Rakudo::Internals::ReactAwaitable'