functools.wraps needs to be called with the decorated function and the implementation of cached decorator was passing the bad arguments

1 files changed, 3 insertions, 4 deletions

diff --git a/astroid/decorators.py b/astroid/decorators.py
index 2c6e40b..a446536 100644
--- a/astroid/decorators.py
+++ b/astroid/decorators.py
@@ -27,14 +27,13 @@ import wrapt
 @wrapt.decorator
 def cached(func, instance, args, kwargs):
     """Simple decorator to cache result of method calls without args."""
-    wrapped_self, = args
-    cache = getattr(wrapped_self, '__cache', None)
+    cache = getattr(instance, '__cache', None)
     if cache is None:
-        wrapped_self.__cache = cache = {}
+        instance.__cache = cache = {}
     try:
         return cache[func]
     except KeyError:
-        cache[func] = result = func(wrapped_self)
+        cache[func] = result = func(*args, **kwargs)
         return result