Bug #11836: Optimized methods cannot be overridden after Module#prepend

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 2.0.0: DONTNEED, 2.1: REQUIRED, 2.2: REQUIRED

[shugo (Shugo Maeda)]

It seems that optimized methods cannot overridden after Module#prepend.

module M
  def /(other)
    quo(other)
  end
end
class Fixnum
  prepend M
end
module M
  def %(other)
    0
  end

  def foo
    puts "m#foo"
  end
end
p 1 / 2 #=> (1/2)  overridden
p 1 % 2 #=> 1      not overridden
1.foo   #=> m#foo  overridden

Is there any good way to disable optimization in this case?

[shugo (Shugo Maeda)]

• Status changed from Open to Closed

Applied in changeset r53179.

---

• vm_method.c (rb_method_entry_make, check_override_opt_method):
  should check whether a newly created method override a optimize
  method in case the method is defined in a prepended module of a
  built-in class.
  [ruby-core:72226] [Bug #11836]

[shugo (Shugo Maeda)]

• Subject changed from Optimized methods cannot overridden after Module#prepend to Optimized methods cannot be overridden after Module#prepend
• Backport changed from 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN to 2.0.0: DONTNEED, 2.1: REQUIRED, 2.2: REQUIRED