When enable desktop-save-mode and save-place-mode, it will take a long
time to restore a file with utf-16 encoding. Finally, will get the error
as below:

--8<---------------cut here---------------start------------->8---

Desktop: Can’t load buffer test-utf-16.txt: Wrong type argument: listp, 㬻※⨭‭潣楤杮›瑵ⵦ㬸洠摯㩥氠獩⵰慤慴ⴠ⴪਍⠨挢⼺獕牥⽳煁慵䐯獥瑫灯琯獥⵴瑵ⵦ㘱琮瑸•‮㘳⤩਍
Wrote c:/Users/Eason/.emacs.d/.emacs.desktop.lock
Desktop: 1 frame, 0 buffers restored, 1 failed to restore.
For information about GNU Emacs and the GNU system, type C-h C-a.

--8<---------------cut here---------------end--------------->8---

If I enable (setq debug-on-error t), will get this information:

--8<---------------cut here---------------start------------->8---

Debugger entered--Lisp error: (wrong-type-argument listp 㬻※⨭‭潣楤杮›瑵ⵦ㬸洠摯㩥氠獩⵰慤慴ⴠ⴪਍⠨挢⼺獕牥⽳煁慵䐯獥瑫灯琯獥⵴瑵ⵦ㘱琮瑸•‮㘳⤩਍)
  load-save-place-alist-from-file()
  save-place-find-file-hook()
  run-hooks(find-file-hook)
  after-find-file(nil nil)
  find-file-noselect-1(#<buffer test-utf-16.txt> "~/Desktop/test-utf-16.txt" :nowarn nil "~/Desktop/test-utf-16.txt" (9851624185350923 244305694))
  find-file-noselect("c:/Users/Eason/Desktop/test-utf-16.txt" :nowarn)
  desktop-restore-file-buffer("c:/Users/Eason/Desktop/test-utf-16.txt" "test-utf-16.txt" nil)
  desktop-create-buffer(208 "c:/Users/Eason/Desktop/test-utf-16.txt" "test-utf-16.txt" text-mode (font-lock-mode) 36 (nil nil) nil nil ((buffer-display-time 25227 30153 506245 0) (buffer-file-coding-system . utf-16le-with-signature-dos)) ((mark-ring nil)))
  load-with-code-conversion("c:/Users/Eason/.emacs.d/.emacs.desktop" "c:/Users/Eason/.emacs.d/.emacs.desktop" t t)
  load("c:/Users/Eason/.emacs.d/.emacs.desktop" t t t)
  desktop-read()
  #f(compiled-function () #<bytecode -0x120651713975d6b5>)()
  run-hooks(after-init-hook delayed-warnings-hook)
  command-line()
  normal-top-level()

--8<---------------cut here---------------end--------------->8---

You can reproduce this issue with the following step:

1. create an file in ~/.emacs.d/init.el
2. put below code in in the init.el file
```
(desktop-save-mode 1)
(save-place-mode 1)
```
3. start Emacs and open a file with UTF-16 encoding, you can use the
sample file in the attachment

4. close Emacs with C-x C-c, will save a .emacs.desktop file and a
places file in the .emacs.d directory.

5. restart Emacs, now you can see the issue.