Fix switch optimization for attributes

diff --git a/Cython/Compiler/Optimize.py b/Cython/Compiler/Optimize.py
index 2e4641497e4fa4e685b0b2f6f8e32368169e49fa..84f7d4e3ad1bc8deacc3fefe5753c1c47f86fa64 100644 (file)
--- a/Cython/Compiler/Optimize.py
+++ b/Cython/Compiler/Optimize.py
@@ -14,7 +14,7 @@ def is_common_value(a, b):
     if isinstance(a, ExprNodes.NameNode) and isinstance(b, ExprNodes.NameNode):
         return a.name == b.name
     if isinstance(a, ExprNodes.AttributeNode) and isinstance(b, ExprNodes.AttributeNode):
-        return not a.is_py_attr and is_common_value(a.obj, b.obj)
+        return not a.is_py_attr and is_common_value(a.obj, b.obj) and a.attribute == b.attribute
     return False