1 files changed, 7 insertions, 0 deletions
diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index 4e3f6c1926..5fe90b0ebf 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -124,4 +124,11 @@ class TestISeq < Test::Unit::TestCase
            ISeq.of(c.instance_method(:foobar)).label
     assert_same a, b
   end
+
+  def test_invalid_source
+    bug11159 = '[ruby-core:69219] [Bug #11159]'
+    assert_raise(TypeError, bug11159) {ISeq.compile(nil)}
+    assert_raise(TypeError, bug11159) {ISeq.compile(:foo)}
+    assert_raise(TypeError, bug11159) {ISeq.compile(1)}
+  end
 end