bug#30078: 27.0.50; Use lexical-binding for M-:

[Eli Zaretskii]

> From: Stefan Monnier <monnier@IRO.UMontreal.CA>
> Cc: michael_heerdegen@web.de, 30078@debbugs.gnu.org
> Date: Fri, 12 Jan 2018 14:06:41 -0500
> 
> >> > Please, not in *scratch*.  Setting variables and then evaluating forms
> >> > that use them is very useful there.
> >> I'm not sure how the two sentences are connected:
> >> Setting lexical-binding to t in *scratch* won't prevent setting
> >> variables and evaluating forms that use them.
> > For some value of "prevent", surely?  Dynamically-bound variables will
> > no longer work as they did before, right?
> 
> No, they'll work pretty much as before.

Then you are saying that turning on lexical-binding in *scratch* will
change nothing at all?  I very much doubt that, and my witness are all
those packages that broke due to lexical-binding and needed minor
fixes.