No, it can't give an infinite loop, exactly because of the empty match rule.

As I noted in the very last paragraph in the post, resetting pos is not making this worse because we don't recall the main regexen from @toktab after we reset pos.

In reply to Re^2: The story of a strange line of code: pos($_) = pos($_); by ambrus
in thread The story of a strange line of code: pos($_) = pos($_); by ambrus

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