I love this footnote so much: > This feature does enable a neat quine: the Perl program “Illegal division by zero at /tmp/quine.pl line 1.”, when saved in the appropriate location, outputs “Illegal division by zero at /tmp/quine.pl line 1.” The reason for this behavior is left as an exercise for the reader.
It's trying to divide "Illegal division by zero at /" by "tmp/quine.pl line 1." and "tmp/quine.pl line 1." evaluates to 0?
the actual parse is
division->Illegal(
zero->by(
((“at” / “tmp”) / “quine”)
. line->pl(1.0)
))