From 5ea03af1268ae4776e8ddd9dc55e14f465710288 Mon Sep 17 00:00:00 2001
From: Mark Byrne <31762852+mbyrnepr2@users.noreply.github.com>
Date: Wed, 30 Mar 2022 22:20:36 +0200
Subject: [PATCH] Fix false positive for the ``unnecessary-ellipsis`` checker
 (#6039)

When an ellipsis is used in a lambda expression.

  Closes #6036

Co-authored-by: Mark Byrne <mark.byrne@rabobank.com>
Co-authored-by: Pierre Sassoulas <pierre.sassoulas@gmail.com>
---
 ChangeLog                                              | 3 ++-
 pylint/checkers/ellipsis_checker.py                    | 1 +
 tests/functional/u/unnecessary/unnecessary_ellipsis.py | 4 +++-
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 34ab7bbcf4..85b489f4d9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -24,8 +24,9 @@ Release date: TBA
 
   Closes #6028
 
-* Fix crash for ``unneccessary-ellipsis`` checker when an ellipsis is used inside of a container.
+* Fix crash for ``unneccessary-ellipsis`` checker when an ellipsis is used inside of a container or a lambda expression.
 
+  Closes #6036
   Closes #6037
   Closes #6048
 
diff --git a/pylint/checkers/ellipsis_checker.py b/pylint/checkers/ellipsis_checker.py
index 1c7a7bebfc..48d43d3b58 100644
--- a/pylint/checkers/ellipsis_checker.py
+++ b/pylint/checkers/ellipsis_checker.py
@@ -49,6 +49,7 @@ def visit_const(self, node: nodes.Const) -> None:
                     nodes.Assign,
                     nodes.BaseContainer,
                     nodes.Call,
+                    nodes.Lambda,
                 ),
             )
             and (
diff --git a/tests/functional/u/unnecessary/unnecessary_ellipsis.py b/tests/functional/u/unnecessary/unnecessary_ellipsis.py
index baba0bbc02..3e967b6cd5 100644
--- a/tests/functional/u/unnecessary/unnecessary_ellipsis.py
+++ b/tests/functional/u/unnecessary/unnecessary_ellipsis.py
@@ -102,7 +102,6 @@ def __getitem__(self, index: Union[int, slice]) -> Union[int, List[int]]:
 def func_with_ellipsis_default_arg(a = ...) -> None:
     "Some docstring."
 
-
 # Ignore if the ellipsis is inside a container:
 my_list = [...]
 my_tuple = (...,)
@@ -112,3 +111,6 @@ def func_with_ellipsis_default_arg(a = ...) -> None:
 mydict1 = {'x': [...]}
 mydict2 = {'x': {...}}
 mydict3 = {'x': (...,)}
+
+# Ignore if the ellipsis is used with a lambda expression
+print("x", lambda: ...)