bug#56613: 29; minibuffer-complete-history throws an error for minibuffer-history-variable=t

[Stefan Monnier]

> Doesn't it work if you retrieve the boundaries first with
> `completion-boundaries` from `minibuffer-completion-table`? In my
> Vertico package I use the following code and it works without issues
> with CRM. The API requires a little bit of a ceremony.

I suspect it won't work correctly when CRM is used with a completion
table that itself uses boundaries (e.g. when completing a list of file
names).

It's quite unusual, so in practice your approach probably works fine,
but fundamentally I think it's "wrong" (tho I don't have much better to
offer right now, except by adding CRM-specific hacks).


        Stefan