in reply to
Re^9: eval to replace die?
in thread eval to replace die?
What all your snide asides and unstated implications resolve to, is that the regex engine is incapable of safely comparing strings.
You skipped over the simpler (and verifiable, per my use of the word "parsing" in my first post in this thread) implication that the unreliable part is writing good regular expressions which are not fragile in the face of simple changes to unstructured data. (That's the same reason many people suggest not parsing HTML with regular expressions, for example.)