From 5e8bbdb6698a8e005c579621611b40a6f486d118 Mon Sep 17 00:00:00 2001
From: Claudiu Popa <cpopa@cloudbasesolutions.com>
Date: Fri, 28 Nov 2014 21:30:45 +0200
Subject: Make dangerous-default-argument check resilient to inferred builtin
 calls for list/tuple/set.

---
 checkers/base.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/checkers/base.py b/checkers/base.py
index 8198d16..604685a 100644
--- a/checkers/base.py
+++ b/checkers/base.py
@@ -685,9 +685,12 @@ functions, methods
 
             if (isinstance(value, astroid.Instance) and
                     value.qname() in DEFAULT_ARGUMENT_SYMBOLS):
+                is_infered_builtin = isinstance(
+                    value,
+                    (astroid.List, astroid.Tuple, astroid.Set))
                 if value is default:
                     msg = DEFAULT_ARGUMENT_SYMBOLS[value.qname()]
-                elif type(value) is astroid.Instance:
+                elif type(value) is astroid.Instance or is_infered_builtin:
                     if isinstance(default, astroid.CallFunc):
                         # this argument is direct call to list() or dict() etc
                         msg = '%s() (%s)' % (value.name, value.qname())
-- 
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