bug#44232: global-display-fill-column-indicator-mode vs. readonly buffers

[Eli Zaretskii]

> From: 積丹尼 Dan Jacobson
>  <jidanni@jidanni.org>
> Date: Mon, 26 Oct 2020 19:09:06 +0800
> Cc: 44232@debbugs.gnu.org
> 
> (Hmmm, (describe-variable 'fill-column) doesn't say what happens when one
> makes it nil

What do you think happens then?

> or how to make it "infinity."

What is "infinity" in this context, and why would one need it?