Freeze the key in newly added entries in Ogg::Vorbis::Comments#[]=.

This makes MainTest#test_modify_key pass.

diff --git a/ext/comments.c b/ext/comments.c
index bc7d844d0d10cf9829f7dd99f3fab4a4ac9912b2..27ea5c7008dba528a6dff0de6e8fe6b7d6010269 100644 (file)
--- a/ext/comments.c
+++ b/ext/comments.c
@@ -355,7 +355,7 @@ c_aset (VALUE self, VALUE key, VALUE value)
                }
        }
 
-       tmp = rb_ary_new3 (2, key, value);
+       tmp = rb_ary_new3 (2, rb_str_dup_frozen (key), value);
        OBJ_FREEZE (tmp);
 
        rb_ary_push (o->items, tmp);