From: Paul Brannan <pbrannan@...>
Date: 2001-11-01T01:20:22+09:00
Subject: [ruby-talk:23979] Strangeness with undefining methods

When I try to undef a method and then redefine it, I get this:

  [pbrannan@zaphod tmp]$ irb
  irb(main):001:0> $VERBOSE = true
  true
  irb(main):002:0> def foo; end
  nil
  irb(main):003:0> foo
  nil
  irb(main):004:0> undef :foo
  nil
  irb(main):005:0> foo
  NameError: undefined local variable or method `foo' for #<Object:0x40295c90>
        from (irb):5
  irb(main):006:0> def foo; end
  (irb):6: warning: discarding old foo
  (irb):6: warning: overriding global function `foo'
  nil

If 'foo' is already removed, then why do I get the "discarding old foo"
message?

Paul