* hash.c (initialize_copy): copy the underlying st_table on dup,

  rather than copying the hash key by key. [ruby-core:48009]

* test/ruby/test_hash.rb: relevant tests for initialize_copy

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37232 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 0 deletions

diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 34d58a0354..1806746ef2 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -91,6 +91,15 @@ class TestHash < Test::Unit::TestCase
     $VERBOSE = @verbose
   end
 
+  def test_bad_initialize_copy
+    h = Class.new(Hash) {
+      def initialize_copy(h)
+        super(Object.new)
+      end
+    }.new
+    assert_raises(TypeError) { h.dup }
+  end
+
   def test_s_AREF
     h = @cls["a" => 100, "b" => 200]
     assert_equal(100, h['a'])