+ // FIXME If the branch is in the master document, we cannot
+ // call recordUndo..., because the master may be hidden, and
+ // the code presently assumes that hidden documents can never
+ // be dirty. See GuiView::closeBufferAll(), for example.
+ // An option would be to check if the master is hidden.
+ // If it is, unhide.
+ if (!master)
+ buffer().undo().recordUndoFullDocument(cur);
+ else
+ // at least issue a warning for now (ugly, but better than dataloss).
+ frontend::Alert::warning(_("Branch state changes in master document"),
+ lyx::support::bformat(_("The state of the branch '%1$s' "
+ "was changed in the master file. "
+ "Please make sure to save the master."), params_.branch), true);