Fix crash from unexpected assignment (#8839)

Author: zenlyj

doc/whatsnew/fragments/8754.bugfix

@@ -0,0 +1,3 @@
+Fix crash when a variable is assigned to a class attribute of identical name.
+
+Closes #8754

pylint/checkers/variables.py

@@ -609,7 +609,9 @@ def get_next_to_consume(self, node: nodes.Name) -> list[nodes.NodeNG] | None:
             and parent_node == found_nodes[0].parent
         ):
             lhs = found_nodes[0].parent.targets[0]
-            if lhs.name == name:  # this name is defined in this very statement
+            if (
+                isinstance(lhs, nodes.AssignName) and lhs.name == name
+            ):  # this name is defined in this very statement
                 found_nodes = None
 
         if (

tests/functional/u/used/used_before_assignment.py

@@ -174,3 +174,9 @@ def give_me_none():
 
 if give_me_none():
     print(ALL_DONE)  # [used-before-assignment]
+
+
+attr = 'test'  # pylint: disable=invalid-name
+class T:  # pylint: disable=invalid-name, too-few-public-methods, undefined-variable
+    '''Issue #8754, no crash from unexpected assignment between attribute and variable'''
+    T.attr = attr