From 5e1928b325bc798f5be1ab94031bf6816d058d9f Mon Sep 17 00:00:00 2001
From: Marc Mueller <30130371+cdce8p@users.noreply.github.com>
Date: Thu, 8 Apr 2021 13:21:19 +0200
Subject: Don't show DuplicateBasesError for attribute access (#4317)

---
 ChangeLog                             | 2 ++
 pylint/checkers/typecheck.py          | 2 ++
 tests/functional/d/duplicate_bases.py | 5 ++++-
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index fd6141047..eaf3fb6d1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -61,6 +61,8 @@ Release date: Undefined
 
   Closes #3850
 
+* Don't show ``DuplicateBasesError`` for attribute access
+
 
 What's New in Pylint 2.7.4?
 ===========================
diff --git a/pylint/checkers/typecheck.py b/pylint/checkers/typecheck.py
index 2da7c6151..e08cf15b7 100644
--- a/pylint/checkers/typecheck.py
+++ b/pylint/checkers/typecheck.py
@@ -985,6 +985,8 @@ accessed. Python regular expressions are accepted.",
                     continue
             except AttributeError:
                 continue
+            except astroid.DuplicateBasesError:
+                continue
             except astroid.NotFoundError:
                 # This can't be moved before the actual .getattr call,
                 # because there can be more values inferred and we are
diff --git a/tests/functional/d/duplicate_bases.py b/tests/functional/d/duplicate_bases.py
index 974f97584..51b329a4f 100644
--- a/tests/functional/d/duplicate_bases.py
+++ b/tests/functional/d/duplicate_bases.py
@@ -2,7 +2,7 @@
 # pylint: disable=missing-docstring,too-few-public-methods,no-init
 
 
-class Duplicates(str, str): # [duplicate-bases]
+class Duplicates(str, str):  # [duplicate-bases]
     pass
 
 
@@ -13,3 +13,6 @@ class Alpha(str):
 class NotDuplicates(Alpha, str):
     """The error should not be emitted for this case, since the
     other same base comes from the ancestors."""
+
+
+print(Duplicates.__mro__)
-- 
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