tdf#126054 uses after free when menubutton and menu torn down during execution

Change-Id: Ib79da121941863421bc12afa27e27cdd7e2e81e3
Reviewed-on: https://gerrit.libreoffice.org/74695
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/framework/source/uielement/menubarmanager.cxx b/framework/source/uielement/menubarmanager.cxx
index 2638f9a..fd61a27 100644
--- a/framework/source/uielement/menubarmanager.cxx
+++ b/framework/source/uielement/menubarmanager.cxx
@@ -890,7 +890,9 @@ IMPL_LINK( MenuBarManager, Select, Menu *, pMenu, bool )
        }
    }

    if ( xDispatch.is() )
    // tdf#126054 don't let dispatch destroy this until after function completes
    rtl::Reference<MenuBarManager> xRef(this);
    if (xDispatch.is())
    {
        SolarMutexReleaser aReleaser;
        xDispatch->dispatch( aTargetURL, aArgs );
diff --git a/vcl/source/control/menubtn.cxx b/vcl/source/control/menubtn.cxx
index c6f6123..ccf336a 100644
--- a/vcl/source/control/menubtn.cxx
+++ b/vcl/source/control/menubtn.cxx
@@ -51,6 +51,10 @@ void MenuButton::ExecuteMenu()
        Point aPos(0, 1);
        tools::Rectangle aRect(aPos, aSize );
        mpMenu->Execute(this, aRect, PopupMenuFlags::ExecuteDown);

        if (IsDisposed())
            return;

        mnCurItemId = mpMenu->GetCurItemId();
        msCurItemIdent = mpMenu->GetCurItemIdent();
    }
diff --git a/vcl/source/window/menu.cxx b/vcl/source/window/menu.cxx
index 516d5930..87440cf 100644
--- a/vcl/source/window/menu.cxx
+++ b/vcl/source/window/menu.cxx
@@ -2968,6 +2968,9 @@ sal_uInt16 PopupMenu::ImplExecute( const VclPtr<vcl::Window>& pW, const tools::R
        aSz.setHeight( ImplCalcHeight( nEntries ) );
    }

    // tdf#126054 hold this until after function completes
    VclPtr<PopupMenu> m_xThis(this);

    pWin->SetFocusId( xFocusId );
    pWin->SetOutputSizePixel( aSz );
    if ( GetItemCount() )