Subject: bug#30039: 26.0.90; [26.1] Making my code warning free is impossible with when-let

From: Eli Zaretskii <[email-masked]>
Date: Fri, 19 Jan 2018 22:26:26 +0200

> From: Noam Postavsky <[email-masked]>
> Date: Fri, 19 Jan 2018 15:00:30 -0500
> Cc: [email-masked], Nicolas Petton <[email-masked]>
> 
> Here's a finished version of the patch. Eli, is it okay for emacs-26?

Why is this new feature is urgent or important enough to have it in
Emacs 26?