Add regression test for no-member with empty AnnAssign

.github/workflows/tests.yaml

@@ -191,7 +191,7 @@ jobs:
         run: >-
           echo "key=venv-${{ env.CACHE_VERSION }}-${{
             hashFiles('setup.cfg', 'requirements_test_min.txt')
-          }}" >> $GITHUB_OUTPUT
+          }}" >> $env:GITHUB_OUTPUT
       - name: Restore Python virtual environment
         id: cache-venv
         uses: actions/cache@v3.0.11

tests/functional/r/regression_02/regression_no_member_7631.py

@@ -0,0 +1,16 @@
+"""Regression test from https://github.com/PyCQA/pylint/issues/7631
+The following code should NOT raise no-member.
+"""
+# pylint: disable=missing-docstring,too-few-public-methods
+
+class Base:
+    attr: int = 2
+
+class Parent(Base):
+    attr: int
+
+class Child(Parent):
+    attr = 2
+
+    def __init__(self):
+        self.attr = self.attr | 4