Add a regression test for AttributeError for Subscript object

Closes pylint-dev#4439
Pierre-Sassoulas · Jul 21, 2021 · d035d96 · d035d96
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diff --git a/ChangeLog b/ChangeLog
@@ -26,6 +26,11 @@ Release date: TBA
 
   Closes #4692
 
+* Fix a crash when there would be a 'TypeError object does not support
+  item assignment' in the code we parse.
+
+  Closes #4439
+
 
 What's New in Pylint 2.9.4?
 ===========================

diff --git a/tests/functional/r/regression/regression_4439.py b/tests/functional/r/regression/regression_4439.py
@@ -0,0 +1,13 @@
+"""AttributeError: 'Subscript' object has no attribute 'name' """
+# pylint: disable=missing-docstring
+
+from typing import Optional
+
+from attr import attrib, attrs
+
+
+@attrs()
+class User:
+    name: str = attrib()
+    age: int = attrib()
+    occupation = Optional[str] = attrib(default=None) # [unsupported-assignment-operation]
diff --git a/tests/functional/r/regression/regression_4439.txt b/tests/functional/r/regression/regression_4439.txt
@@ -0,0 +1 @@
+unsupported-assignment-operation:13:17:User:'Optional' does not support item assignment:HIGH