fix tabufline crash when formatting buf | (#1265)

lua/core/init.lua

@@ -39,7 +39,7 @@ autocmd("BufEnter", {
 vim.t.bufs = vim.api.nvim_list_bufs()
 
 -- thx to https://github.com/ii14 & stores buffer per tab -> table
-autocmd({ "BufAdd" }, {
+autocmd("BufAdd", {
    callback = function(args)
       if vim.t.bufs == nil then
          vim.t.bufs = { args.buf }
@@ -76,5 +76,5 @@ if require("core.utils").load_config().ui.tabufline_lazyloaded then
    require("core.lazy_load").tabufline()
 else
    vim.opt.showtabline = 2
-   vim.opt.tabline = "%!v:lua.require('ui.tabline').run()"
+   vim.opt.tabline = "%!v:lua.require'ui.tabline'.run()"
 end

lua/core/lazy_load.lua

@@ -114,7 +114,7 @@ M.tabufline = function()
       callback = function()
          if #vim.fn.getbufinfo { buflisted = 1 } >= 2 then
             vim.opt.showtabline = 2
-            vim.opt.tabline = "%!v:lua.require('ui.tabline').run()"
+            vim.opt.tabline = "%!v:lua.require'ui.tabline'.run()"
             vim.api.nvim_del_augroup_by_name "TabuflineLazyLoad"
          end
       end,

lua/core/utils.lua

@@ -195,8 +195,20 @@ M.packer_sync = function(...)
    end
 end
 
+M.bufilter = function()
+   local bufs = vim.t.bufs
+
+   for i = #bufs, 1, -1 do
+      if not vim.api.nvim_buf_is_loaded(bufs[i]) then
+         table.remove(bufs, i)
+      end
+   end
+
+   return bufs
+end
+
 M.tabuflineNext = function()
-   local bufs = vim.t.bufs or {}
+   local bufs = M.bufilter() or {}
 
    for i, v in ipairs(bufs) do
       if api.nvim_get_current_buf() == v then
@@ -207,7 +219,7 @@ M.tabuflineNext = function()
 end
 
 M.tabuflinePrev = function()
-   local bufs = vim.t.bufs or {}
+   local bufs = M.bufilter() or {}
 
    for i, v in ipairs(bufs) do
       if api.nvim_get_current_buf() == v then