Subject: bug#48949: 28.0.50; Thread-Process Liberalization

From: Eli Zaretskii <[email-masked]>
Date: Fri, 11 Jun 2021 08:53:39 +0300

> From: [email-masked]
> Date: Thu, 10 Jun 2021 16:36:34 -0400
> 
> Without this patch, threaded nnimap painfully starts a new imap connection
> with every refresh.
> 
> >From 6e9c04f4cd6b45aec319dad9e3dea4b9ec034c6b Mon Sep 17 00:00:00 2001
> From: dickmao <none>
> Date: Thu, 10 Jun 2021 16:19:16 -0400
> Subject: [PATCH] Lift a 2012 "process locked to thread" restriction
> 
> Remove an unexplained error that forbade a thread from
> accepting output from a process it didn't start.

That's a non-starter, sorry.  This restriction is one of the design
goals, so Emacs behaves here as intended.  It is not a bug, at least
not where you suggest the fix.