working serialized writes with panics on failure. Everything seems to be working

crates/vim/src/test/vim_test_context.rs

@@ -44,6 +44,7 @@ impl<'a> VimTestContext<'a> {
         let (window_id, workspace) = cx.add_window(|cx| {
             Workspace::new(
                 Default::default(),
+                0,
                 project.clone(),
                 |_, _| unimplemented!(),
                 cx,