1 files changed, 40 insertions, 0 deletions
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 2da7797b47..55af33fe48 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -151,6 +151,26 @@ class TestSyntax < Test::Unit::TestCase
       o.instance_eval("def foo(var: var) var end")
     end
     assert_nil(o.foo, bug9593)
+
+    o = Object.new
+    assert_warn(/circular argument reference - var/) do
+      o.instance_eval("def foo(var: bar(var)) var end")
+    end
+
+    o = Object.new
+    assert_warn(/circular argument reference - var/) do
+      o.instance_eval("def foo(var: bar {var}) var end")
+    end
+
+    o = Object.new
+    assert_warn("") do
+      o.instance_eval("def foo(var: bar {|var| var}) var end")
+    end
+
+    o = Object.new
+    assert_warn("") do
+      o.instance_eval("def foo(var: def bar(var) var; end) var end")
+    end
   end
 
   def test_optional_self_reference
@@ -167,6 +187,26 @@ class TestSyntax < Test::Unit::TestCase
       o.instance_eval("def foo(var = var) var end")
     end
     assert_nil(o.foo, bug9593)
+
+    o = Object.new
+    assert_warn(/circular argument reference - var/) do
+      o.instance_eval("def foo(var = bar(var)) var end")
+    end
+
+    o = Object.new
+    assert_warn(/circular argument reference - var/) do
+      o.instance_eval("def foo(var = bar {var}) var end")
+    end
+
+    o = Object.new
+    assert_warn("") do
+      o.instance_eval("def foo(var = bar {|var| var}) var end")
+    end
+
+    o = Object.new
+    assert_warn("") do
+      o.instance_eval("def foo(var = def bar(var) var; end) var end")
+    end
   end
 
   def test_warn_grouped_expression