Error handling in file related methods?

Hi!

I wonder what the "philosophy" is regarding error handling in file 
related methods in Ruby. Let me give an example. It is the method
Kernel.test(?-, ...), i.e. a test to see if two files are hard links
to the same file:

     $ mkdir subdir
     $ touch subdir/aaa
     $ ln subdir/aaa subdir/bbb
     $
     $ chmod 0755 subdir
     $ ruby -e 'p test(?-, *ARGV)' subdir/aaa subdir/bbb
     true
     $
     $ chmod 0 subdir
     $ ruby -e 'p test(?-, *ARGV)' subdir/aaa subdir/bbb
     false                    <--- NOTE THIS !!!
     $

The "problem" with this behaviour is that the files *are* hard links
but the permissions prevents us from finding that out. I think it
would be better to get an exception indicating that, instead of
"lying" to the script.

I suspect that Ruby behaves in this way in several similar situations.

Should this be changed?
If so, what would be the preferred action?

/Johan Holmberg