From 9dc33b83bb866e0bc0c4d67e32040b31d26e0738 Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 18 Apr 2016 09:12:46 +0000
Subject: merge revision(s) 54611,54612: [Backport #12291]

	* struct.c (struct_make_members_list): extract making member name
	  list from char* va_list, with creating symbols without
	  intermediate IDs.

	* struct.c (struct_make_members_list, rb_struct_s_def): member
	  names should be unique. [ruby-core:74971] [Bug #12291]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54637 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_struct.rb | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'test/ruby')

diff --git a/test/ruby/test_struct.rb b/test/ruby/test_struct.rb
index 38632a1981..1223d4b816 100644
--- a/test/ruby/test_struct.rb
+++ b/test/ruby/test_struct.rb
@@ -367,6 +367,13 @@ module TestStruct
     assert_nil(o.dig(:b, 0))
   end
 
+  def test_new_dupilicate
+    bug12291 = '[ruby-core:74971] [Bug #12291]'
+    assert_raise_with_message(ArgumentError, /duplicate member/, bug12291) {
+      @Struct.new(:a, :a)
+    }
+  end
+
   class TopStruct < Test::Unit::TestCase
     include TestStruct
 
-- 
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