Update NodeScopeResolver.php

Author: staabm

src/Analyser/NodeScopeResolver.php

@@ -5700,6 +5700,7 @@ private function processAssignVar(
 
 				if (
 					$var === $originalVar
+					&& $var->dim !== null
 					&& $scope->hasExpressionType($var)->yes()
 				) {
 					$assignedPropertyExpr = new SetExistingOffsetValueTypeExpr(