From 69541515b9f208f01fe9ded8ee2e4a730f47f2ed Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <tgoodlet@gmail.com>
Date: Tue, 29 Aug 2017 10:09:02 -0400
Subject: [PATCH] Handle firstresult hooks that return None

Only return the first result when at least one result has been returned
by underlying hook implementations.

Fixes #68
---
 pluggy/callers.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pluggy/callers.py b/pluggy/callers.py
index abe36e78..20079e70 100644
--- a/pluggy/callers.py
+++ b/pluggy/callers.py
@@ -107,7 +107,8 @@ def execute(self):
                     pass
 
             if firstresult:
-                return outcome.get_result()[0]
+                result = outcome.get_result()
+                return result if result else None
 
             return outcome.get_result()