Subject: RE: bug#25302: 25.1; `isearch-allow-prefix' does not allow `C-u C-u'

From: Drew Adams <[email-masked]>
Date: Fri, 30 Dec 2016 14:57:53 -0800 (PST)

> > This seems to fix it:
> > -(memq this-command '(universal-argument
> > +(memq this-command '(universal-argument universal-argument-more
> 
> Yes!  Please commit the fix.  Thx.

But a guess about the regression for `isearch-allow-scroll' is that
it also needs to be added here:

 ;; Universal argument commands
 (put 'universal-argument 'isearch-scroll t)
 (put 'negative-argument 'isearch-scroll t)
 (put 'digit-argument 'isearch-scroll t)

IOW, add (put 'universal-argument-more 'isearch-scroll t)