1 files changed, 25 insertions, 0 deletions
diff --git a/tests/run/methodmangling_unknown_names.py b/tests/run/methodmangling_unknown_names.py
new file mode 100644
index 000000000..dae1f5c22
--- /dev/null
+++ b/tests/run/methodmangling_unknown_names.py
@@ -0,0 +1,25 @@
+# mode: run
+# tag: allow_unknown_names, pure2.0, pure3.0
+
+class Test(object):
+    def run(self):
+        """
+        >>> Test().run()
+        NameError1
+        NameError2
+        found mangled
+        """
+        try:
+            print(__something)
+        except NameError:
+            print("NameError1")  # correct - shouldn't exist
+        globals()['__something'] = 'found unmangled'
+        try:
+            print(__something)
+        except NameError:
+            print("NameError2")  # correct - shouldn't exist
+        globals()['_Test__something'] = 'found mangled'
+        try:
+            print(__something)  # should print this
+        except NameError:
+            print("NameError3")