fix secure tab

venv/lib/python3.9/site-packages/gevent/tests/test__real_greenlet.py

@@ -0,0 +1,34 @@
+"""Testing that greenlet restores sys.exc_info.
+
+Passes with CPython + greenlet 0.4.0
+
+Fails with PyPy 2.2.1
+"""
+from __future__ import print_function
+import sys
+
+from gevent import testing as greentest
+
+class Test(greentest.TestCase):
+
+    def test(self):
+        import greenlet
+
+        print('Your greenlet version: %s' % (getattr(greenlet, '__version__', None), ))
+
+        result = []
+
+        def func():
+            result.append(repr(sys.exc_info()))
+
+        g = greenlet.greenlet(func)
+        try:
+            1 / 0
+        except ZeroDivisionError:
+            g.switch()
+
+
+        self.assertEqual(result, ['(None, None, None)'])
+
+if __name__ == '__main__':
+    greentest.main()