bug#47456: 27.1; emacs hangs using aspell in auctex

[Eli Zaretskii]

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> From: Brian Elmegaard <be@mek.dtu.dk>
> Date: Mon, 29 Mar 2021 06:56:11 +0000
> 
> Thanks for the quick reply, Eli.
> 
> I confirm that invoking \msys64\mingw64\bin\aspell.exe -c file.tex works.
> 
> Does this answer your question?

Not really.  Emacs invokes "aspell -a -m", not -c.  See
ispell-start-process for the details.  What happens in that case if
you send the line containing just "+" and a newline to the speller?

And which version of Aspell are you using?