Fix an infinite loop with decorator call chain inference, where the decorator returns itself. Closes issue #50.

1 files changed, 4 insertions, 0 deletions

diff --git a/scoped_nodes.py b/scoped_nodes.py
index eb60298f..08fc67bf 100644
--- a/scoped_nodes.py
+++ b/scoped_nodes.py
@@ -499,6 +499,10 @@ def _infer_decorator_callchain(node):
                 #       because there's no flow to reason when the return
                 #       is what we are looking for, a static or a class method.
                 result = current.infer_call_result(current.parent).next()
+                if current is result:
+                    # This will lead to an infinite loop, where a decorator
+                    # returns itself.
+                    return
             except (StopIteration, InferenceError):
                 return
             if isinstance(result, (Function, CallFunc)):