From 55adb1cccdd7bbe46530eed89b7a378c85886e96 Mon Sep 17 00:00:00 2001
From: Peter Krautzberger <p.krautzberger@gmail.com>
Date: Tue, 15 Jun 2021 09:18:36 +0200
Subject: [PATCH] fix: prevent overset from allowing movable limits

Matches UnderOver behavior.

Fixes MathJax/MathJax#2709
---
 ts/input/tex/base/BaseMethods.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ts/input/tex/base/BaseMethods.ts b/ts/input/tex/base/BaseMethods.ts
index fb5fc6b87..9aa6078be 100644
--- a/ts/input/tex/base/BaseMethods.ts
+++ b/ts/input/tex/base/BaseMethods.ts
@@ -647,7 +647,8 @@ BaseMethods.UnderOver = function(parser: TexParser, name: string, c: string, sta
 BaseMethods.Overset = function(parser: TexParser, name: string) {
   // @test Overset
   const top = parser.ParseArg(name), base = parser.ParseArg(name);
-  if (NodeUtil.getAttribute(base, 'movablelimits') || NodeUtil.getProperty(base, 'movablelimits')) {
+  let symbol = NodeUtil.getForm(base);
+  if ((symbol && symbol[3] && symbol[3]['movablelimits'])) {
     NodeUtil.setProperties(base, {'movablelimits': false});
   }
   const node = parser.create('node', 'mover', [base, top]);