1 files changed, 8 insertions, 0 deletions
diff --git a/test/ruby/test_objectspace.rb b/test/ruby/test_objectspace.rb
index e0f9eecd11..1c97bd517e 100644
--- a/test/ruby/test_objectspace.rb
+++ b/test/ruby/test_objectspace.rb
@@ -65,6 +65,14 @@ End
     assert_raise_with_message(TypeError, msg) {ObjectSpace._id2ref(Object.new)}
   end
 
+  def test_id2ref_invalid_symbol_id
+    # RB_STATIC_SYM_P checks for static symbols by checking that the bottom
+    # 8 bits of the object is equal to RUBY_SYMBOL_FLAG, so we need to make
+    # sure that the bottom 8 bits remain unchanged.
+    msg = /is not symbol id value/
+    assert_raise_with_message(RangeError, msg) { ObjectSpace._id2ref(:a.object_id + 256) }
+  end
+
   def test_count_objects
     h = {}
     ObjectSpace.count_objects(h)