2 files changed, 7 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index b5d1e8f8c9..b6ffb31a95 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Wed May 18 21:29:59 2016  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* thread.c (recursive_list_access): a object id may be a Bignum.  so,
+	  the list must be a objhash, instead of a identhash.
+	  this fixes many test errors on mswin64 CI.
+
 Wed May 18 19:33:54 2016  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* re.c (rb_reg_match_m_p): Introduce Regexp#match?, which returns
diff --git a/thread.c b/thread.c
index 457c996302..d17b663bae 100644
--- a/thread.c
+++ b/thread.c
@@ -4333,7 +4333,7 @@ recursive_list_access(VALUE sym)
 	list = rb_hash_aref(hash, sym);
     }
     if (NIL_P(list) || !RB_TYPE_P(list, T_HASH)) {
-	list = rb_ident_hash_new();
+	list = rb_hash_new();
 	rb_hash_aset(hash, sym, list);
     }
     return list;