Subject: bug#48925: [PATCH] Set `minibuffer-completion-*` variables buffer-locally in a few more places

From: Gregory Heytings <[email-masked]>
Date: Fri, 12 Nov 2021 00:22:58 +0000

>> What is awkward to do in C?
>
> We don't have anby facility to create closures from C, so we'd basically 
> have to call an ELisp function to create the closure.
>

BTW, these patches would be much simpler and this discussion would not 
exist with the approach I defended in bug#45474.