use autodie;
##</code><code>##

$ perl -Mautodie -e " $asdf = 44; chdir '$asdf' "
Can't chdir('$asdf'): No such file or directory at -e line 1

$ perl -Mautodie -e " $asdf = 44; chdir $asdf "
Can't chdir('44'): No such file or directory at -e line 1