rsFalse

perl 5.20 was effected, take a look: https://github.com/perl/perl5/issues/14857

> I don't understand this report. Why do you expect `\g{-1}` to work the same as `\g{1}`? I didn't read documentation carefully, and thought that `\g{-1}` could see its group...

Two lists in a row look confusing when syntax is only parentheses, no real separator. It could be e.g. `foreach(;){}` or `foreach(;;){}` syntax (semicolon as separator), if `foreach` and `for`...