bug#13999: 24.3.50; rng-validate-while-idle -> (error "Selecting deleted buffer")

[Stefan Monnier]

>>> The code in rng-valid.el uses the following idiom to redisplay without
>>> triggering idle timers.
>> Why does it need to do that?
> Does the following make any sense?

No, I don't understand what problem this is trying to avoid.
If noone understands this hack, I suggest to get rid of this
let-binding, and if/when the corresponding problem ever appears, we'll
see about fixing it some other way.


        Stefan