fix #18862: E0601 false positive with lambda functions

1 files changed, 2 insertions, 1 deletions

diff --git a/checkers/variables.py b/checkers/variables.py
index 454fc9c63..f17c94033 100644
--- a/checkers/variables.py
+++ b/checkers/variables.py
@@ -380,7 +380,8 @@ builtins. Remember that you should avoid to define new builtins when possible.'
                         if defstmt is stmt and isinstance(node, (astng.DelName,
                                                                  astng.AssName)):
                             self.add_message('E0602', args=name, node=node)
-                        else:
+                        elif self._to_consume[-1][-1] != 'lambda':
+                            # E0601 may *not* occurs in lambda scope
                             self.add_message('E0601', args=name, node=node)
                 if not isinstance(node, astng.AssName): # Aug AssName
                     del to_consume[name]