smallest possible segfault with the enums patch

$ cat A.pm
enum Result <failure success forced-success>; role X {}

$ cat B.pm
class B;

method str_escape($/) {
    if 1 {
        make :16(4);
    }
}

$ perl6 -e 'use A; use B'
Segmentation fault

Put those statements directly on the command line, and it works.
Put those statements in the same module and 'use' that module, and it works.
Remove almost any component of the two files, and it works.