Origin: upstream, commit:91b4788037003b5fe2c2b99371af5f3049041d0e
Author: Dmitri Ovodok <dmitrio95@yandex.ru>
Description: fix #291986: fix a crash on removing a custom workspace via menu
 A more accurate version of 6a5a7cbcab30c94d2fcb0801670ba4ea694eb9c7

--- a/mscore/workspace.cpp
+++ b/mscore/workspace.cpp
@@ -707,8 +707,10 @@ void Workspace::read(XmlReader& e)
                   QMenuBar* mb = mscore->menuBar();
                   const QObjectList menus(mb->children()); // need a copy
                   for (QObject* m : menus) {
-                        if (qobject_cast<QMenu*>(m))
-                              delete m;
+                        if (qobject_cast<QMenu*>(m)) {
+                              m->setParent(nullptr);
+                              m->deleteLater();
+                              }
                         }
                   mb->clear();
                   menuToStringList.clear();
@@ -811,8 +813,10 @@ void Workspace::readGlobalMenuBar()
                               QMenuBar* mb = mscore->menuBar();
                               const QObjectList menus(mb->children()); // need a copy
                               for (QObject* m : menus) {
-                                    if (qobject_cast<QMenu*>(m))
-                                          delete m;
+                                    if (qobject_cast<QMenu*>(m)) {
+                                          m->setParent(nullptr);
+                                          m->deleteLater();
+                                          }
                                     }
                               mb->clear();
                               menuToStringList.clear();