martin rudalics <rudalics@gmx.at> writes:

> +           ((and last-time
> +                 (> double-click-time (* 1000 (- this-time last-time)))
>
> Note that here and elsewhere coders assume that ‘double-click-time’ is a
> number.  However, it may be also nil or t and we should fix those
> instances eventually (see Bug#23419).  In new or changed code, at least.

Sure, here's a third patch to deal with that: