1 files changed, 10 insertions, 0 deletions
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 38799a841e..eb63e3dfa7 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -203,6 +203,16 @@ class TestSyntax < Test::Unit::TestCase
     end
 
     o = Object.new
+    assert_warn(/circular argument reference - var/) do
+      o.instance_eval("def foo(var = (def bar;end; var)) var end")
+    end
+
+    o = Object.new
+    assert_warn(/circular argument reference - var/) do
+      o.instance_eval("def foo(var = (def self.bar;end; var)) var end")
+    end
+
+    o = Object.new
     assert_warn("") do
       o.instance_eval("def foo(var = bar {|var| var}) var end")
     end