Ribbon - An AV occurs when opening a form or pressing Alt+F12 to switch the form back from the text view when the form contains the Ribbon with unassigned BarManager property

If you place a dxRibbon on a form, but do not assign a BarManager, once you reopen the form you get:

[Window Title]
Error

[Content]
Error creating form: Access violation at address 1D35235F in module 'dxBarRS20.bpl'. Read of address 00000158.

[OK]

Steps to reproduce:

1. Open a new project
2. Create a form
3. Place a TdxRibbon
4. Press Alt+F12 (goes to the dfm)
5. Press Alt+F12 (goes back to the form, causing the components to be (re)created)
6. You get the above mentioned AV

If you connect a BarManager to the Ribbon the problem disappears.

Reason:

procedure TdxCustomRibbon.Loaded;
begin
  BeginUpdate;
  try
    Tabs.UpdateBarManager(BarManager);
    inherited Loaded;
    ActiveTab := FLoadedActiveTab;
    if ActiveTab <> nil then
      ActiveTab.CheckGroupToolbarsDockControl;
    Tabs.RestoreOrder;
    Tabs.UpdateContexts;
    BarManagerSaveState;   { <--- THIS LINE IS NEW in this release; obviously it doesn't check that there's no bar manager}
  finally
    EndUpdate;
  end;
end;

Better solution is to check here:

procedure TdxCustomRibbon.BarManagerSaveState;
begin
  TdxBarManagerAccess(BarManager).SaveState;   { <<-- NO CHECK THAT BARMANAGER CAN BE NIL }
end;