Backport #9030: Backport r43334 (fix for SEGV with Refinements)

• Status: Closed
• Assignee: nagachika (Tomoyuki Chikanaga)

[shugo (Shugo Maeda)]

=begin
Please backport r43334 to avoid SEGV when an undefined method is refined but the refinement is not used.
For example, the following program causes SEGV.

  class Foo
    def foo
    end

    undef foo
  end

  module FooExt
    refine Foo do
      def foo
      end
    end
  end

  begin
    Foo.new.foo # or Foo.new.send(:foo)
  end

=end

[nagachika (Tomoyuki Chikanaga)]

• Status changed from Open to Assigned

[nagachika (Tomoyuki Chikanaga)]

• Status changed from Assigned to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r43345.
Shugo, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

merge revision(s) 43334: [Backport #9030]

* vm_insnhelper.c (vm_call_method): set ci->me to 0 when the
  original method of a refined method is undef to avoid SEGV.

* vm_method.c (rb_method_entry_without_refinements): return 0 when
  the original method of a refined method is undef to avoid SEGV.

* test/ruby/test_refinement.rb: related test.