* io.c (rb_io_close_m): Don't raise when the IO object is closed.

  [ruby-core:67444] [Feature #10718]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49260 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 935ee24d83..7161be1a6e 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -3159,4 +3159,17 @@ End
       end
     end
   end
+
+  def test_close_twice
+    open(__FILE__) {|f|
+      assert_equal(nil, f.close)
+      assert_equal(nil, f.close)
+    }
+  end
+
+  def test_close_uninitialized
+    io = IO.allocate
+    assert_raise(IOError) { io.close } 
+  end
+
 end