Simplify the way HTTPExceptionHandler catches HTTPExceptions. You can no longer raise httpexceptions in your app_iter

1 files changed, 1 insertions, 1 deletions

diff --git a/paste/wsgilib.py b/paste/wsgilib.py
index 9960587..02dd2dc 100644
--- a/paste/wsgilib.py
+++ b/paste/wsgilib.py
@@ -227,7 +227,7 @@ def catch_errors_app(application, environ, start_response, error_callback_app,
         return error_callback_app(environ, start_response, sys.exc_info())
     if type(app_iter) in (list, tuple):
         # These won't produce exceptions
-        if ok_callback:
+        if ok_callback is not None:
             ok_callback()
         return app_iter
     else: