Bug #10731: Segmentation fault when create alias to refined method

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.3.0dev (2015-01-12 trunk 49218) [x86_64-darwin14]
• Backport: 2.0.0: DONE, 2.1: DONE, 2.2: DONE

[hanachin (Seiei Miyagi)]

following code cause segmentation fault, both foo and bar is not defined in refined class, in trunk and 2.2.0, 2.1.5, 2.0.0

class C
end

module RefinementBug
  refine C do
    def foo
    end

    def bar
    end
  end
end

class C
  alias foo bar
end

it should be raise a NameError if the original method of the refined method is not exist, like undef (#8966).

[hanachin (Seiei Miyagi)]

• File 0001-vm_method.c-raise-a-NameError-when-create-alias-to-r.patch 0001-vm_method.c-raise-a-NameError-when-create-alias-to-r.patch added

the patch for this.

[nobu (Nobuyoshi Nakada)]

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

Applied in changeset r49221.

---

vm_method.c: NameError at refined method alias

• vm_method.c (rb_alias): raise a NameError when creating alias to
  a refined method if the original method of the refined method is
  not defined. [ruby-core:67523] [Bug #10731]

[nagachika (Tomoyuki Chikanaga)]

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

[usa (Usaku NAKAMURA)]

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

[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 r49311 merged revision(s) 49221.

[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 r49425 merged revision(s) 49221.
test is a little changed to get rid of a warning about refinement 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 r49787.