2 files changed, 11 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 9801c367df..c954757318 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Oct 20 06:18:34 2012  Aaron Patterson <aaron@tenderlovemaking.com>
+
+	* hash.c (initialize_copy): unset the default proc if there isn't one
+	  for the target hash, call to_hash, check frozen status.
+
 Fri Oct 19 22:22:01 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* vm.c (rb_vm_jump_tag_but_local_jump): pass through thrown objects.
diff --git a/hash.c b/hash.c
index bf9dbd5467..1ddf23aea2 100644
--- a/hash.c
+++ b/hash.c
@@ -1185,6 +1185,9 @@ replace_i(VALUE key, VALUE val, VALUE hash)
 static VALUE
 rb_hash_initialize_copy(VALUE hash, VALUE hash2)
 {
+    rb_hash_modify_check(hash);
+    hash2 = to_hash(hash2);
+
     Check_Type(hash2, T_HASH);
 
     if (!RHASH_EMPTY_P(hash2)) {
@@ -1195,6 +1198,9 @@ rb_hash_initialize_copy(VALUE hash, VALUE hash2)
     if (FL_TEST(hash2, HASH_PROC_DEFAULT)) {
         FL_SET(hash, HASH_PROC_DEFAULT);
     }
+    else {
+	FL_UNSET(hash, HASH_PROC_DEFAULT);
+    }
     RHASH_IFNONE(hash) = RHASH_IFNONE(hash2);
 
     return hash;