merge revision(s) 58077: [Backport #13358]

ostruct.rb: fix OpenStruct.allocate

	* lib/ostruct.rb (OpenStruct.allocate): initialize an instance
	  variable directly, without calling `intialize` method which may
	  be overridden in a subclass.  [ruby-core:80292] [Bug #13358]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@58161 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/ostruct.rb

@@ -73,7 +73,10 @@
 class OpenStruct
   # :nodoc:
   class << self
-    alias allocate new
+    def allocate
+      (x = super).instance_variable_set(:@table, {})
+      x
+    end
   end
 
   #

test/ostruct/test_ostruct.rb

@@ -181,4 +181,13 @@ class TC_OpenStruct < Test::Unit::TestCase
     os.foo = 44
     assert_equal(43, os.foo)
   end
+
+  def test_allocate_subclass
+    bug = '[ruby-core:80292] [Bug #13358] allocate should not call initialize'
+    c = Class.new(OpenStruct) {
+      def initialize(x,y={})super(y);end
+    }
+    os = assert_nothing_raised(ArgumentError, bug) {c.allocate}
+    assert_instance_of(c, os)
+  end
 end

version.h

@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.3.3"
 #define RUBY_RELEASE_DATE "2017-03-28"
-#define RUBY_PATCHLEVEL 270
+#define RUBY_PATCHLEVEL 271
 
 #define RUBY_RELEASE_YEAR 2017
 #define RUBY_RELEASE_MONTH 3