Do not proxy _is_coroutine attr, fixes #136

tests/test_stack/test_registry.py

@@ -2,6 +2,7 @@
 # This module is part of the Python Paste Project and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php
 import inspect
+import asyncio
 import pytest
 from webtest import TestApp
 from tg.support.registry import RegistryManager, StackedObjectProxy, DispatchingConfig
@@ -192,6 +193,11 @@ def test_stacked_object_inspect():
     assert inspect.unwrap(so) is so
 
 
+def test_stacked_object_iscoroutinefunction():
+    so = StackedObjectProxy()
+    assert not asyncio.iscoroutinefunction(so)
+
+
 def test_simple():
     app = TestApp(simpleapp)
     response = app.get('/')
@@ -400,4 +406,4 @@ def app(environ, start_response):
     except:
         # Looping again will crash because we already popped
         # The registered object and cleanup will fail.
-        pass
+        pass

tg/support/objectproxy.py

@@ -62,4 +62,6 @@ def __contains__(self, key):
 
     def __nonzero__(self):
         return bool(self._current_obj())
-    __bool__ = __nonzero__
+    __bool__ = __nonzero__
+
+    _is_coroutine = None