From e507a4d87ec80e706ac0c8ce2d23bd28006cbbbc Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Mon, 24 Apr 2023 19:50:25 +0000
Subject: Fix a false positive for ``bad-dunder-name`` when there is a
 user-defined ``__index__`` method. (#8619) (#8622)

Closes #8613

(cherry picked from commit f223c6de3a39eae6d1c76e30b55da28639dd8777)

Co-authored-by: Mark Byrne <31762852+mbyrnepr2@users.noreply.github.com>
---
 doc/whatsnew/fragments/8613.false_positive         | 3 +++
 pylint/constants.py                                | 1 +
 tests/functional/ext/bad_dunder/bad_dunder_name.py | 3 +++
 3 files changed, 7 insertions(+)
 create mode 100644 doc/whatsnew/fragments/8613.false_positive

diff --git a/doc/whatsnew/fragments/8613.false_positive b/doc/whatsnew/fragments/8613.false_positive
new file mode 100644
index 000000000..80d28e9c2
--- /dev/null
+++ b/doc/whatsnew/fragments/8613.false_positive
@@ -0,0 +1,3 @@
+Fix a false positive for ``bad-dunder-name`` when there is a user-defined ``__index__`` method.
+
+Closes #8613
diff --git a/pylint/constants.py b/pylint/constants.py
index ad7fc2256..de29fb9b8 100644
--- a/pylint/constants.py
+++ b/pylint/constants.py
@@ -281,6 +281,7 @@ EXTRA_DUNDER_METHODS = [
     "__getnewargs_ex__",
     "__getnewargs__",
     "__getstate__",
+    "__index__",
     "__setstate__",
     "__reduce__",
     "__reduce_ex__",
diff --git a/tests/functional/ext/bad_dunder/bad_dunder_name.py b/tests/functional/ext/bad_dunder/bad_dunder_name.py
index 48247aba0..6008866b1 100644
--- a/tests/functional/ext/bad_dunder/bad_dunder_name.py
+++ b/tests/functional/ext/bad_dunder/bad_dunder_name.py
@@ -49,6 +49,9 @@ class Apples:
     def __doc__(self):
         return "Docstring"
 
+    def __index__(self):
+        return 1
+
 
 def __increase_me__(val):
     return val + 1
-- 
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