* hash.c (rb_hash_aset, recursive_hash): rejects recursive hash.

  [ruby-core:22921]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24149 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/hash.c b/hash.c
index c65d24263e..da47b55bea 100644
--- a/hash.c
+++ b/hash.c
@@ -1016,6 +1016,9 @@ VALUE
 rb_hash_aset(VALUE hash, VALUE key, VALUE val)
 {
     rb_hash_modify(hash);
+    if (hash == key) {
+	rb_raise(rb_eArgError, "recursive key for hash");
+    }
     if (RHASH(hash)->ntbl->type == &identhash || rb_obj_class(key) != rb_cString) {
 	st_insert(RHASH(hash)->ntbl, key, val);
     }
@@ -1546,7 +1549,7 @@ recursive_hash(VALUE hash, VALUE dummy, int recur)
     VALUE hval;
 
     if (recur) {
-	return LONG2FIX(0);
+	rb_raise(rb_eArgError, "recursive key for hash");
     }
     if (!RHASH(hash)->ntbl)
         return LONG2FIX(0);