fix thread creation on py27

greentest/testrunner.py

@@ -16,6 +16,8 @@ from util import log
 
 TIMEOUT = 180
 NWORKERS = int(os.environ.get('NWORKERS') or max(cpu_count() - 1, 4))
+if NWORKERS > 10:
+    NWORKERS = 10
 
 
 # tests that don't do well when run on busy box

util/cythonpp.py

@@ -25,8 +25,11 @@ class Thread(threading.Thread):
     def run(self):
         target = getattr(self, '_target', None) # Py3
         if target is None:
-            target = getattr(self, '_Thread__target', None)
-        self.value = target(*self._args)
+            target = getattr(self, '_Thread__target')
+            args = getattr(self, '_Thread__args')
+        else:
+            args = self._args
+        self.value = target(*args)
 
 do_exec = None
 if sys.version_info >= (3, 0):