patch 9.1.0252: Vim9: segfault with static in super class

Problem:  Vim9: segfault with static in super class
          (Ernie Rael)
Solution: When initializing lhs, use the correct class where a class
          variable is defined (Yegappan Lakshmanan)

fixes: #14352
closes: #14372

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_vim9_class.vim

@@ -10463,4 +10463,32 @@ def Test_current_class_object_class_member()
   v9.CheckScriptSuccess(lines)
 enddef
 
+" Test for updating a base class variable from a base class method without the
+" class name.  This used to crash Vim (Github issue #14352).
+def Test_use_base_class_variable_from_base_class_method()
+  var lines =<< trim END
+    vim9script
+
+    class DictKeyClass
+      static var _obj_id_count = 1
+      def _GenerateKey()
+        _obj_id_count += 1
+      enddef
+      static def GetIdCount(): number
+        return _obj_id_count
+      enddef
+    endclass
+
+    class C extends DictKeyClass
+      def F()
+        this._GenerateKey()
+      enddef
+    endclass
+
+    C.new().F()
+    assert_equal(2, DictKeyClass.GetIdCount())
+  END
+  v9.CheckScriptSuccess(lines)
+enddef
+
 " vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    252,
 /**/
     251,
 /**/

src/vim9compile.c

@@ -1790,10 +1790,11 @@ compile_lhs(
 		    return FAIL;
 
 		lhs->lhs_dest = dest_class_member;
-		lhs->lhs_class = cctx->ctx_ufunc->uf_class;
+		// The class variable is defined either in the current class or
-		lhs->lhs_type =
+		// in one of the parent class in the hierarchy.
-		    oc_member_type_by_idx(cctx->ctx_ufunc->uf_class,
+		lhs->lhs_class = defcl;
-					FALSE, lhs->lhs_classmember_idx);
+		lhs->lhs_type = oc_member_type_by_idx(defcl, FALSE,
+						lhs->lhs_classmember_idx);
 	    }
 	    else
 	    {