bug#72771: 31.0.50; shr html renderer throwing "Specified window is not displaying the current buffer"

[Eli Zaretskii <eliz@gnu.org>]

> Date: Fri, 23 Aug 2024 09:15:52 +0100
> From:  Rob Stewart via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> When attempting to open the attached (anonymised) message with mm-text-html-renderer set to `shr`, I get this bracktrace:
> 
> --8<---------------cut here---------------start------------->8---
> Debugger entered--Lisp error: (error "Specified window is not displaying the current buffer")
>   shr-indent()
>   shr-fill-line()
>   shr-fill-lines(13724 15455)
>   shr-insert-document((html ((xmlns:o . .))))
>   mm-shr((#<buffer  *mm*-655965> ("text/html" (charset . "Windows-1252")) quoted-printable nil nil nil nil nil))
>   mm-inline-text-html((#<buffer  *mm*-655965> ("text/html" (charset . "Windows-1252")) quoted-printable nil nil nil nil nil))
>   mm-display-inline((#<buffer  *mm*-655965> ("text/html" (charset . "Windows-1252")) quoted-printable nil nil nil nil nil))
>   mm-display-part((#<buffer  *mm*-655965> ("text/html" (charset . "Windows-1252")) quoted-printable nil nil nil nil nil))
>   gnus-mime-display-alternative(((#<buffer  *mm*-410985> ("text/plain" (charset . "Windows-1252")) quoted-printable nil ("inline") nil nil nil) (#<buffer  *mm*-655965> ("text/html" (charset . "Windows-1252")) quoted-printable nil nil nil nil nil)) nil nil 1)
>   gnus-mime-display-part((#("multipart/alternative" ...)))
>   gnus-display-mime(nil)
>   #f(compiled-function (&optional ihandles) #<bytecode -0xcb4ad9361861f2a>)()
>   gnus-article-prepare-display()
>   mu4e--view-render-buffer((:path ...))
>   mu4e-view((:path ...))
>   mu4e~headers-view-handler((:path ...))
> --8<---------------cut here---------------end--------------->8---
> 
> I've been asked here:
> 
> https://github.com/djcb/mu/issues/2747#issuecomment-2305245669
> 
> to report this as an Emacs bug/incompatibility.
> 
> I'm using Emacs build 3d1d4f109ed4115256a08c74eeb704259d91c9f4 (21 August 2024).

This is being discussed here:

  https://lists.gnu.org/archive/html/emacs-devel/2024-08/msg00788.html