decorators should also be included in the static analysis

jedi/evaluate/analysis.py

@@ -138,4 +138,11 @@ def get_module_statements(module):
         imports |= set(scope.imports)
         stmts |= add_stmts(scope.statements)
         stmts |= add_stmts(r for r in scope.returns if r is not None)
+
+        try:
+            decorators = scope.decorators
+        except AttributeError:
+            pass
+        else:
+            stmts |= add_stmts(decorators)
     return stmts, imports

test/static_analysis/attribute_error.py

@@ -75,3 +75,12 @@ return_one(''.undefined_attribute)
 [undefined for r in [1, 2]]
 
 [r for r in [1, 2]]
+
+# -----------------
+# decorators
+# -----------------
+
+#! 1 name-error
+@undefined_decorator
+def func():
+    return 1