JVM error

./perl6-j --ll-exception tools/build/install-core-dist.pl /home/dan/Source/perl6/install/share/perl6
Flattening named argument must have VMHash REPR
  in repository-for-spec (gen/jvm/CORE.setting:40635)
  in do_pragma (src/Perl6/World.nqp:1024)
  in do_pragma_or_load_module (src/Perl6/World.nqp:1118)
  in statement_control:sym<use> (src/Perl6/Grammar.nqp:1561)
  in !protoregex (gen/jvm/stage2/QRegex.nqp:1377)
  in statement_control (src/Perl6/Grammar.nqp)
  in statement (src/Perl6/Grammar.nqp:1251)
  in statementlist (src/Perl6/Grammar.nqp:1180)
  in LANG (gen/jvm/stage2/NQPHLL.nqp:693)
  in FOREIGN_LANG (src/Perl6/Grammar.nqp:1579)
  in comp_unit (src/Perl6/Grammar.nqp:1164)
  in TOP (src/Perl6/Grammar.nqp:467)
  in parse (gen/jvm/stage2/QRegex.nqp:2093)
  in parse (gen/jvm/stage2/NQPHLL.nqp:1400)
  in compile (gen/jvm/stage2/NQPHLL.nqp:1356)
  in eval (gen/jvm/stage2/NQPHLL.nqp:1092)
  in evalfiles (gen/jvm/stage2/NQPHLL.nqp:1313)
  in command_eval (gen/jvm/stage2/NQPHLL.nqp:1207)
  in command_eval (src/Perl6/Compiler.nqp:27)
  in command_line (gen/jvm/stage2/NQPHLL.nqp:1181)
  in MAIN (gen/jvm/main.nqp:47)
  in <mainline> (gen/jvm/main.nqp:38)
  in  (gen/jvm/main.nqp)