You mean perltrap?

At the time, I was referring to the section entitled "Common Goofs for Novices" in Chapter 24 (page 585) of Programming Perl, 3rd edition. Though I knew about perltrap, I temporarily "forgot" about it and so did not mention it. :-( Since the "Common Goofs for Novices" section and perltrap share a common heritage, perltrap is a more up-to-date reference and is recommended reading. Thanks for pointing this out.