By the way, strict is now on by default in Perl 5.12
Except that it's not.
Did you deliberately misquote me? I specifically said version 5.12 of the interpreter wasn't sufficient.
Since 5.10, Perl has been changing in backwards incompatible ways. To get the latest version of the language, you need to request it using use 5.010; or similar.
But since the presence of commas can be detected without running the program, I do not think checking for this at every run is required.
Either you didn't express yourself properly, or you just advocated that strict var checks be moved to the linter.