From cd9cf38ee9e3f760a0524646661c91b706de63ac Mon Sep 17 00:00:00 2001
From: "Jason R. Coombs" <jaraco@jaraco.com>
Date: Wed, 19 Aug 2015 20:21:27 +0100
Subject: Fix error in handling of --extras

---
 ptr.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ptr.py b/ptr.py
index 7988ebb..5c5287e 100644
--- a/ptr.py
+++ b/ptr.py
@@ -68,7 +68,7 @@ class PyTest(orig.test):
 		extras_require = self.distribution.extras_require or {}
 		for spec, reqs in extras_require.items():
 			name, sep, marker = spec.partition(':')
-			if not self.marker_passes(marker):
+			if marker and not self.marker_passes(marker):
 				continue
 			# always include unnamed extras
 			if not name or self.extras:
-- 
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