Before they would just be silently ignored.
---
 lib/tools/ensure_dirs.py |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/lib/tools/ensure_dirs.py b/lib/tools/ensure_dirs.py
index 4c4e7a1..c762575 100644
--- a/lib/tools/ensure_dirs.py
+++ b/lib/tools/ensure_dirs.py
@@ -239,10 +239,14 @@ def Main():
   """Main routine.
 
   """
-  (opts, _) = ParseOptions()
+  (opts, args) = ParseOptions()
 
   SetupLogging(opts)
 
+  if args:
+    logging.error("No arguments are expected")
+    return constants.EXIT_FAILURE
+
   if opts.full_run:
     logging.info("Running in full mode")
 
-- 
1.7.7.3

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