StackOverflowError with alias

```
What steps will reproduce the problem?
require "rational.rb"

class Fixnum
  alias / quo
end

p 3/4 

What is the expected output?
Rational(3, 4)

What do you see instead?
StackOverflowError


```

Original issue reported on code.google.com by `xue.yong...@gmail.com` on 20 Sep 2007 at 2:01
