Optimize parameter lookup by default

diff --git a/jinja2/compiler.py b/jinja2/compiler.py
index ea720c260a1fd9a2ea466c2cb9c5d632dca40afd..65bffe6c0e6e4deec3c74ea5dbf67e987223fbe0 100644 (file)
--- a/jinja2/compiler.py
+++ b/jinja2/compiler.py
@@ -608,7 +608,7 @@ class CodeGenerator(NodeVisitor):
     def parameter_is_undeclared(self, target):
         """Checks if a given target is an undeclared parameter."""
         if not self._param_def_block:
-            return True
+            return False
         return target in self._param_def_block[-1]
 
     def push_assign_tracking(self):