fix: error when non-current oil buffer has validation errors (#561)

Author: stevearc

lua/oil/mutator/init.lua

@@ -553,10 +553,13 @@ M.try_write_changes = function(confirm, cb)
         { all_errors[curbuf][1].lnum + 1, all_errors[curbuf][1].col }
       )
     else
-      ---@diagnostic disable-next-line: param-type-mismatch
-      local bufnr, errs = next(pairs(all_errors))
-      vim.api.nvim_win_set_buf(0, bufnr)
-      pcall(vim.api.nvim_win_set_cursor, 0, { errs[1].lnum + 1, errs[1].col })
+      local bufnr, errs = next(all_errors)
+      -- HACK: This is a workaround for the fact that we can't switch buffers in the middle of a
+      -- BufWriteCmd.
+      vim.schedule(function()
+        vim.api.nvim_win_set_buf(0, bufnr)
+        pcall(vim.api.nvim_win_set_cursor, 0, { errs[1].lnum + 1, errs[1].col })
+      end)
     end
     unlock()
     cb("Error parsing oil buffers")