Fixes empty tuple case.

zooba · zooba · commit bb08db4010a4 · 2016-11-19T21:14:27.000-08:00
diff --git a/Lib/os.py b/Lib/os.py
@@ -834,7 +834,7 @@ def _spawnvef(mode, file, args, env, func):
         # Internal helper; func is the exec*() function to use
         if not isinstance(args, (tuple, list)):
             raise TypeError('argv must be a tuple or a list')
-        if not args[0]:
+        if not args or not args[0]:
             raise ValueError('argv first element cannot be empty')
         pid = fork()
         if not pid:
