From: Ilmari Heikkinen <ilmari.heikkinen@...>
Date: 2006-07-09T04:15:57+09:00
Subject: Method lookup weirdness

Hi,

I'm a bit mystified by the following:

### Strange
module Foo
  extend self
  def bar; 'bar' end
end

Foo.bar

module Foo
  remove_method :bar
end

Foo.bar
# => 'bar'   # eh?


### Normal
module Bar
  extend self
  def foo; 'foo' end
end

module Bar
  remove_method :foo
end

Bar.foo
# undefined method `foo' for Bar:Module (NoMethodError)


### Broken
$ irb
module Qux
  extend self
  def bar; 'bar' end
end

Qux.bar

module Qux
  remove_method :bar
end

GC.start # eats Qux#bar ?

Qux.bar
[BUG] terminated node (0x4057fdd8)
ruby 1.8.4 (2005-12-24) [i486-linux]


The crash happens only in irb in my testing.

What might be causing this? If anyone with more
knowledge of Ruby's internals could shed
light on this, I'd be grateful.


--
ilmari