bug#21830: Useless messages from comint-previous-matching-input

[Wolfgang Jenkner]

On Wed, Nov 04 2015, Jay Adams wrote:

> 1. They go by so fast as to be unnoticeable (this happens on my Ubuntu
> desktop).
> 2. They go by slowly and make the search excruciatingly slow (this happens
> on my Mac).

I guess the message is meant to remain visible until you use the
minibuffer (again) or some other message pops up from somewhere.

At least, this is what happens for me when I call
comint-previous-matching-input-from-input or
comint-previous-matching-input repeatedly (via some key binding).

Can you reproduce your problem with emacs -Q?