Linux and aliasing?

[Jeffrey A Law]

  In message < u9hfok74ok.fsf@yorick.cygnus.com >you write:
  > Saying "garbage in, garbage out" is a cop-out.  If we're going to let code
  > like this break, we need to emit a warning so that people know that they
  > have a problem, rather than leaving them to debug obscure problems.
Anyone want to work on this?  If we can spit out a warning without getting
too many false positives it would be a win.    I'm not familiar enough with
the front-ends to even guess how much work it might be.

jeff