MRI 1.8.x quirk with alias and super for included modules

module_super_with_alias.rb

module A
  def foo
    "a"
  end

  alias bar foo
end

module B
  def foo
    "#{super} b"
  end

  alias bar foo
end

class C
  include A
end

puts "With just A"
puts "foo: #{C.new.foo}"
puts "bar: #{C.new.bar}"
puts

class C
  include B
end

puts "With A and B"
puts "foo: #{C.new.foo}"
puts "bar: #{C.new.bar}"

results.txt

$ rvm 1.8.7,1.9.1,jruby ruby module_super_with_alias.rb 
ruby-1.8.7-p249: ruby 1.8.7 (2010-01-10 patchlevel 249) [i686-darwin9.8.0] 
With just A
foo: a
bar: a

With A and B
foo: a b
module_super_alias.rb:11:in `bar': super: no superclass method `foo' for #<C:0x1297c4> (NoMethodError)
	from module_super_alias.rb:32
ruby-1.9.1-p378: ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-darwin9.8.0] 
With just A
foo: a
bar: a

With A and B
foo: a b
bar: a b
jruby-1.4.0: jruby 1.4.0 (ruby 1.8.7 patchlevel 174) (2009-11-02 69fbfa3) (Java HotSpot(TM) Client VM 1.5.0_22) [i386-java] 
With just A
foo: a
bar: a

With A and B
foo: a b
bar: a b