Re: git tip: Error in winner-save-old-configurations (flyspell-post-command-hook): (wrong-type-argument stringp nil) [73 times]

[Eli Zaretskii]

> From: Sam Steingold <sds@gnu.org>
> Date: Wed, 07 Sep 2022 11:26:29 -0400
> 
> > * Eli Zaretskii <ryvm@tah.bet> [2022-09-07 05:27:15 +0300]:
> >
> >> From: Sam Steingold <sds@gnu.org>
> >> Date: Tue, 06 Sep 2022 15:47:23 -0400
> >> 
> >> Hi,
> >> With the fresh Emacs from yesterday, I get
> >> 
> >> Error in winner-save-old-configurations (flyspell-post-command-hook): 
> >> (wrong-type-argument stringp nil)
> >> 
> >> in the Echo Area and *Messages* on every move in an Org-mode buffer.
> >> 
> >> I don't know how to debug it (I tried stepping through
> >> `flyspell-post-command-hook' and got nothing), so I wonder if someone
> >> sees anything like that.
> >> 
> >> Thank you.
> >> 
> >> PS. The trivial sequence of
> >> 
> >> emacs -Q
> >> C-x b foo RET
> >> M-x org-mode RET
> >> M-x winner-mode RET
> >> M-x flyspell-mode RET
> >> foo bar baz
> >> 
> >> does not, alas, produce the described behavior...
> >
> > So what _is_ the recipe to reproduce it?
> 
> I cannot reproduce it without my huge .emacs

Then I guess you will have to debug this on your system.

One way of doing that is to attach a debugger and put a breakpoint in
wrong_type_argument.  When it breaks, collect both C and Lisp
backtraces, and post them.