Force encoding in reading of setup.cfg to utf-8 (#4329)

* Add Sebastian Müller to contributors
* Add setup.cfg utf8 fix to changelog

Co-authored-by: Pierre Sassoulas <[email protected]>

Author: MuellerSeb

CONTRIBUTORS.txt

@@ -468,3 +468,5 @@ contributors:
 * James Sinclair (irgeek): contributor
 
 * Andreas Finkler: contributor
+
+* Sebastian Müller: contributor

ChangeLog

@@ -67,6 +67,10 @@ Release date: Undefined
 
 * Don't show ``DuplicateBasesError`` for attribute access
 
+* Fix crash when checking ``setup.cfg`` for pylint config when there are non-ascii characters in there
+
+  Closes #4328
+
 * Allow code flanked in backticks to be skipped by spellchecker
 
   Closes #4319

pylint/config/find_default_config_files.py

@@ -26,7 +26,7 @@ def _toml_has_config(path):
 
 def _cfg_has_config(path):
     parser = configparser.ConfigParser()
-    parser.read(path)
+    parser.read(path, encoding="utf-8")
     return any(section.startswith("pylint.") for section in parser.sections())