commit b8b6a68baa8860d1357d63fcb2cc3428dfaf147f
author Antoine Pitrou <solipsis@pitrou.net> Fri Jun 29 19:40:35 2012 +0200
committer Antoine Pitrou <solipsis@pitrou.net> Fri Jun 29 19:40:35 2012 +0200
tree dfd767915de380f02be43b6844b3a4b4afc2a24d
parent 5b5619f717be2a712c05d6c63a0ca4184f263aee

Better diagnose test failure

Lib/test/test_threading.py

diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index 00f73a7..17be84b 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -768,10 +768,10 @@
             """
         expected_output = "end of main thread\n"
         p = subprocess.Popen([sys.executable, "-c", script],
-                             stdout=subprocess.PIPE)
+                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
         stdout, stderr = p.communicate()
         data = stdout.decode().replace('\r', '')
-        self.assertEqual(p.returncode, 0, "Unexpected error")
+        self.assertEqual(p.returncode, 0, "Unexpected error: " + stderr.decode())
         self.assertEqual(data, expected_output)
 
 class LockTests(lock_tests.LockTests):