From 9b1fd5a05f481ab87c4f8ad010168ec836cc3c5a Mon Sep 17 00:00:00 2001
From: Thomas Jespersen <laumann.thomas@gmail.com>
Date: Mon, 5 Jan 2015 11:03:51 +0100
Subject: [PATCH] Check for no parameters when invoking cargo

---
 python/servo/devenv_commands.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/python/servo/devenv_commands.py b/python/servo/devenv_commands.py
index 30c8a440750..76f4a5e0bd3 100644
--- a/python/servo/devenv_commands.py
+++ b/python/servo/devenv_commands.py
@@ -21,6 +21,8 @@ class MachCommands(CommandBase):
         'params', default=None, nargs='...',
         help="Command-line arguments to be passed through to Cargo")
     def cargo(self, params):
+        if not params:
+            params = []
         return subprocess.call(["cargo"] + params,
                                env=self.build_env())