merge revision(s) 45076: [Backport #9535]

	* class.c (rb_mod_init_copy): do nothing if copying self.
	  [ruby-dev:47989] [Bug #9535]

	* hash.c (rb_hash_initialize_copy): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@45128 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/hash.c b/hash.c
index db510c818e..66cd94bcdd 100644
--- a/hash.c
+++ b/hash.c
@@ -1428,6 +1428,8 @@ rb_hash_initialize_copy(VALUE hash, VALUE hash2)
 
     Check_Type(hash2, T_HASH);
 
+    if (hash == hash2) return hash;
+
     ntbl = RHASH(hash)->ntbl;
     if (RHASH(hash2)->ntbl) {
 	if (ntbl) st_free_table(ntbl);