$ perl6-j --ll-exception -e "sub foo { EVAL 'role R { }' }; foo;"
java.lang.NullPointerException
  in compile_in_context (src/Perl6/World.nqp:1497)
  in pkg_set_role_body_block (src/Perl6/World.nqp:1745)
  in package_def (src/Perl6/Actions.nqp:1953)
  in !reduce (gen/jvm/stage2/QRegex.nqp:771)
  in !cursor_pass (gen/jvm/stage2/QRegex.nqp:732)
  in package_def (src/Perl6/Grammar.nqp:2395)
  in package_declarator:sym<role> (src/Perl6/Grammar.nqp)
  in !protoregex (gen/jvm/stage2/QRegex.nqp:808)
  in package_declarator (src/Perl6/Grammar.nqp)
  in term:sym<package_declarator> (src/Perl6/Grammar.nqp)
  in !protoregex (gen/jvm/stage2/QRegex.nqp:808)
  in term (src/Perl6/Grammar.nqp)
  in termish (src/Perl6/Grammar.nqp:3557)
  in EXPR (gen/jvm/stage2/NQPHLL.nqp:558)
  in EXPR (src/Perl6/Grammar.nqp:3588)
  in statement (src/Perl6/Grammar.nqp:1300)
  in statementlist (src/Perl6/Grammar.nqp:1235)
  in LANG (gen/jvm/stage2/NQPHLL.nqp:766)
  in FOREIGN_LANG (src/Perl6/Grammar.nqp:1638)
  in comp_unit (src/Perl6/Grammar.nqp:1093)
  in TOP (src/Perl6/Grammar.nqp:356)
  in parse (gen/jvm/stage2/QRegex.nqp:1400)
  in parse (gen/jvm/stage2/NQPHLL.nqp:1425)
  in compile (gen/jvm/stage2/NQPHLL.nqp:1381)
  in EVAL (gen/jvm/CORE.setting:763)
  in EVAL (gen/jvm/CORE.setting:756)
  in foo (-e:1)
  in <unit> (-e:1)
  in <unit-outer> (-e:1)
  in eval (gen/jvm/stage2/NQPHLL.nqp:1145)
  in  (gen/jvm/stage2/NQPHLL.nqp:1234)
  in command_eval (gen/jvm/stage2/NQPHLL.nqp:1231)
  in command_eval (src/Perl6/Compiler.nqp:17)
  in command_line (gen/jvm/stage2/NQPHLL.nqp:1216)
  in MAIN (gen/jvm/main.nqp:39)
  in <mainline> (gen/jvm/main.nqp:35)
  in  (gen/jvm/main.nqp)