Here's results of r8894 on up-to-date Fedora Core 4 with embparrot r11392. Other the usual embparrot rules breakage, is looking pretty clean here even with bleadparrot. All the failures below look like rules coredumps to me, including the undef.t one.
Larry Failed Test Stat Wstat Total Fail Failed List of Failed ------------------------------------------------------------------------------- t/builtins/undef.t 0 11 72 26 36.11% 60-72 t/pugsbugs/rule_used_in_Str.t 254 65024 3 4 133.33% 2-3 t/pugsbugs/rules_with_embedded_pa 254 65024 1 2 200.00% 1 t/rules/from_perl6_rules/anchors. 0 11 19 38 200.00% 1-19 t/rules/from_perl6_rules/array_ca 0 11 45 90 200.00% 1-45 t/rules/from_perl6_rules/assert.t 0 11 4 8 200.00% 1-4 t/rules/from_perl6_rules/capture. 0 11 65 130 200.00% 1-65 t/rules/from_perl6_rules/charset. 0 4 22 44 200.00% 1-22 t/rules/from_perl6_rules/codevars 0 11 10 20 200.00% 1-10 t/rules/from_perl6_rules/combchar 0 11 3 6 200.00% 1-3 t/rules/from_perl6_rules/der_gram 0 11 33 66 200.00% 1-33 t/rules/from_perl6_rules/grammar. 0 11 17 34 200.00% 1-17 t/rules/from_perl6_rules/inline.t 0 11 2 4 200.00% 1-2 t/rules/from_perl6_rules/litvar.t 0 11 29 58 200.00% 1-29 t/rules/from_perl6_rules/named_ca 0 11 26 52 200.00% 1-26 t/rules/from_perl6_rules/null.t 0 4 3 6 200.00% 1-3 t/rules/from_perl6_rules/prior.t 0 11 31 62 200.00% 1-31 t/rules/from_perl6_rules/repeat.t 0 11 6 12 200.00% 1-6 t/rules/from_perl6_rules/rulecode 0 11 4 8 200.00% 1-4 t/rules/from_perl6_rules/stdrules 254 65024 222 444 200.00% 1-222 t/rules/from_perl6_rules/subrule. 0 11 18 36 200.00% 1-18 t/rules/from_perl6_rules/subst.t 0 11 3 6 200.00% 1-3 t/rules/from_perl6_rules/word.t 0 11 7 14 200.00% 1-7 t/rules/named_rule_capture.t 0 11 4 8 200.00% 1-4 897 subtests skipped. Failed 24/506 test scripts, 95.26% okay. 589/9076 subtests failed, 93.51% okay.