You are absolutely correct. The error “Can't locate Module.pm in @INC” exists, but AFAIK no such error message referring to functions does. So there are two and a half possibilities:

• It is a trick question to test your knowledge of Perl. Explain how a similar error regarding modules does exist, and what the role of @INC is.
• The question contains a mistake. This is the most likely explanation, considering that perldiag has no entry for such an error message.
• There is some surprising new behavior in Perl which neither you nor I am not aware of. While possible, this isn't exactly the most likely explanation.

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