Add regression test (#5339)

Author: DanielNoord

tests/functional/r/regression_02/regression_4982.py

@@ -0,0 +1,18 @@
+"""Regression test for a crash reported in https://github.com/PyCQA/pylint/issues/4982"""
+# pylint: disable=too-few-public-methods
+
+class Base:
+    """A class"""
+    @classmethod
+    def get_first_subclass(cls):
+        """Return the first subclass of this class"""
+        for subklass in cls.__subclasses__():
+            return subklass
+        return object
+
+
+subclass = Base.get_first_subclass()
+
+
+class Another(subclass):
+    """Create a class from the __subclasses__ attribute of another class"""