How come lc(undef) gives a warning?
I know, I know! It's because you're using 5.12! (lc(undef) doesn't give a warning in 5.10, 5.8.x or 5.6.x).

In reply to Re^16: Use of uninitialized value in substr by JavaFan
in thread Use of uninitialized value in substr by BrowserUk

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