Bug #10885: Segmentation fault when calling refined method in duplicate module

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.3.0dev (2015-02-22) [x86_64-linux]
• Backport: 2.0.0: DONE, 2.1: DONE, 2.2: DONE

[ktsj (Kazuki Tsujimoto)]

以下のコードでSEGVします。
Moduleをdupする時にcrefをコピーしていますが、その中でnd_refinementsを設定していないのが原因です。

module M
  refine BasicObject do
    def __id__
    end
  end

  class << self
    def m
      __id__
    end
  end
end

M.dup.m

[ktsj (Kazuki Tsujimoto)]

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

Applied in changeset r49685.

---

• vm_insnhelper.c (rb_vm_rewrite_cref_stack): copy nd_refinements
  of orignal crefs. It fixes segmentation fault when calling
  refined method in duplicate module. [ruby-dev:48878] [Bug #10885]

• vm_core.h, class.c: change accordingly.

• test/ruby/test_refinement.rb: add a test for above.

[naruse (Yui NARUSE)]

• Backport changed from 2.0.0: REQUIRED, 2.1: REQUIRED, 2.2: REQUIRED to 2.0.0: REQUIRED, 2.1: REQUIRED, 2.2: DONE

ruby_2_2 r49708 merged revision(s) 49685,49687.

[usa (Usaku NAKAMURA)]

• Backport changed from 2.0.0: REQUIRED, 2.1: REQUIRED, 2.2: DONE to 2.0.0: DONE, 2.1: REQUIRED, 2.2: DONE

ruby_2_0_0 r49739 merged revision(s) 49685,49687.
note: omitted the test because Module#using is not available on 2.0.0.

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.0.0: DONE, 2.1: REQUIRED, 2.2: DONE to 2.0.0: DONE, 2.1: DONE, 2.2: DONE

Backported into ruby_2_1 branch at r49995.