justin:~ $ perl -MCGI::Carp -e '
warn "Warning with newline\n";
carp "Carp with newline\n";
print STDERR "Print with newline\n"'
[Thu Feb 26 17:53:00 2009] -e: Warning with newline
[Thu Feb 26 17:53:00 2009] -e: Carp with newline
[Thu Feb 26 17:53:00 2009] -e:  at -e line 3
Print with newline
justin:~ $