Stacktrace doesn't tell me much

stacktrace.txt

$ ./perl6 --ll-exception -e 'macro foo { my $a = "OH HAI"; quasi { say $a } }; foo'
Null PMC access in find_method('gist')
current instr.: 'say' pc 800681 (src/gen/CORE.setting.pir:195299) (src/gen/CORE.setting:5932)
called from Sub '_block1409' pc 69 ((file unknown):34400304) (:1)
called from Sub '_block1407' pc 14 ((file unknown):34400245) (:1)
called from Sub 'nqp;HLL;Compiler;_block1775' pc 33846 (src/stage2/gen/NQPHLL.pir:11762) (src/stage2/gen/NQPHLL.pm:1269)
called from Sub 'nqp;HLL;Compiler;eval' pc 33657 (src/stage2/gen/NQPHLL.pir:11668) (src/stage2/gen/NQPHLL.pm:1259)
called from Sub 'nqp;HLL;Compiler;_block1864' pc 35540 (src/stage2/gen/NQPHLL.pir:12596) (src/stage2/gen/NQPHLL.pm:1386)
called from Sub 'nqp;HLL;Compiler;command_eval' pc 34969 (src/stage2/gen/NQPHLL.pir:12356) (src/stage2/gen/NQPHLL.pm:1401)
called from Sub 'nqp;Perl6;Compiler;command_eval' pc 974 (src/gen/perl6-compiler.pir:377) (src/Perl6/Compiler.nqp:18)
called from Sub 'nqp;HLL;Compiler;command_line' pc 34633 (src/stage2/gen/NQPHLL.pir:12198) (src/stage2/gen/NQPHLL.pm:1353)
called from Sub 'MAIN' pc 753 (src/gen/perl6.pir:287) (src/main.nqp src/gen/main-version.nqp:32)
called from Sub '_block1000' pc 100 (src/gen/perl6.pir:71) (src/main.nqp src/gen/main-version.nqp:1)