"perldoc -f die", third paragraph:

If the value of EXPR does not end in a newline, the current script line number and input line number (if any) are also printed, and a newline is supplied. Note that the "input line number" (also known as "chunk") is subject to whatever notion of "line" happens to be currently in effect, and is also available as the special variable `$.'. See the section on "$/" in the perlvar manpage and the section on "$." in the perlvar manpage.

        - tye (but my friends call me "Tye")