not be able to preview "no name" in talescope tabs

[yimingwangdell]

Description

not be able to preview "no name" in talescope tabs

Neovim version

NVIM v0.11.0-dev-358+g6a886a251

Operating system and version

linux

Telescope version / branch / rev

latest

checkhealth telescope

==============================================================================
telescope: health#telescope#check

Checking for required plugins ~
- OK plenary installed.
- OK nvim-treesitter installed.

Checking external dependencies ~
- OK rg: found ripgrep 13.0.0
- WARNING fd: not found. Install [sharkdp/fd](https://github.com/sharkdp/fd) for extended capabilities

===== Installed extensions ===== ~

Telescope Extension: `aerial` ~
- No healthcheck provided

Telescope Extension: `telescope-tabs` ~
- No healthcheck provided

Steps to reproduce

1. open a new tab
2. type something
3. use :Telescope telescope-tabs list_tabs

Expected behavior

see preview

Actual behavior

no preview on no named tabs

Minimal config

local root = vim.fn.fnamemodify("./.repro", ":p")

-- set stdpaths to use .repro
for _, name in ipairs { "config", "data", "state", "cache" } do
  vim.env[("XDG_%s_HOME"):format(name:upper())] = root .. "/" .. name
end

-- bootstrap lazy
local lazypath = root .. "/plugins/lazy.nvim"
if not vim.uv.fs_stat(lazypath) then
  vim.fn.system {
    "git",
    "clone",
    "--filter=blob:none",
    "https://github.com/folke/lazy.nvim.git",
    lazypath,
  }
end
vim.opt.runtimepath:prepend(lazypath)

-- install plugins
local plugins = {
  {
    "nvim-telescope/telescope.nvim",
    dependencies = {
      "nvim-lua/plenary.nvim",
    },
    config = function()
      -- ADD INIT.LUA SETTINGS THAT ARE _NECESSARY_ FOR REPRODUCING THE ISSUE
      require("telescope").setup {}
    end,
  },
}

require("lazy").setup(plugins, {
  root = root .. "/plugins",
})

[yimingwangdell]

fire ticket to LukasPietzschmann/telescope-tabs, so close it.

[jamestrew]

This PR might be relevant. telescope itself currently doesn't handle previews of buffer's real contents too well currently.

If telescope-tabs is using the buffer previewer from telescope core, it well not be able to preview unwritten buffers.