make default value for dialects safe

buildbot · Jan 31, 2015 · f2f4970 · f2f4970
1 parent 6b899db
commit f2f4970
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/master/buildbot/status/web/change_hook.py b/master/buildbot/status/web/change_hook.py
@@ -32,13 +32,16 @@ class ChangeHookResource(resource.Resource):
     contentType = "text/html; charset=utf-8"
     children = {}
 
-    def __init__(self, dialects={}):
+    def __init__(self, dialects=None):
         """
         The keys of 'dialects' select a modules to load under
         master/buildbot/status/web/hooks/
         The value is passed to the module's getChanges function, providing
         configuration options to the dialect.
         """
+        if dialects is None:
+            dialects = {}
+
         self.dialects = dialects
         self.request_dialect = None