Egad! Since when did the context of the literal slice propogate down into the right side of the slice? This is news to me. It was not that way when I invented it in Perl 3. {sigh} It must've changed in Perl5, because I'm sure I got burned by this in Perl4.
-- Randal L. Schwartz, Perl hacker
On further investigation, it appears that wantarray is true inside the subscript, but some sort of DWIMmery is happening. Ick!