chdir "-"; won't work anywhere. All I can say is "untested code". It doesn't matter what your shell is. Perl is handing that to chdir(2) which is then looking (regardless of shell) for a subdirectory called dash underneath the current directory.

That's why you should always always always check the return status of chdir -- to prevent such embarassment.

-- Randal L. Schwartz, Perl hacker