1 files changed, 14 insertions, 0 deletions
diff --git a/test/ruby/test_struct.rb b/test/ruby/test_struct.rb
index 49dcdb45b2..d769e47dc5 100644
--- a/test/ruby/test_struct.rb
+++ b/test/ruby/test_struct.rb
@@ -1,5 +1,6 @@
 require 'test/unit'
 require 'timeout'
+require_relative 'envutil'
 
 class TestStruct < Test::Unit::TestCase
   def test_struct
@@ -249,4 +250,17 @@ class TestStruct < Test::Unit::TestCase
       assert !x.eql?(z)
     }
   end
+
+  def test_struct_subclass
+    bug5036 = '[ruby-dev:44122]'
+    st = Class.new(Struct)
+    s = st.new("S", :m).new
+    error = assert_raise(SecurityError) do
+      proc do
+        $SAFE = 4
+        s.m = 1
+      end.call
+    end
+    assert_equal("Insecure: can't modify #{st}::S", error.message, bug5036)
+  end
 end