Thanks for the debugger pointer. Using it, I discovered that the problem lies on line 208 of cwd.t.

# this is the line I removed
#    ($file) = grep {-f $_ and not -l $_} map File::Spec->catfile($roo
+t, $_), readdir FH;

# and replaced with this
    foreach my $x (readdir(FH)) {
        my $y = File::Spec->catfile($root, $x);
        if (-f $y && ! -l $y) {
            $file = $y;
            last;
        }
    }
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It appears there was somthing in my root directory that wasn't to the code's liking, so I just took the first successful hit of the file test operators and bailed out of the loop. I'm fairly certain I didn't compromise the accuracy of the test, but please let me know if you see a problem with what I did.