bug#28864: 25.3.50; next-error-no-select does select

[Dmitry Gutov <dgutov@yandex.ru>]

On 10/17/17 5:17 PM, Tino Calancha wrote:

> Thank you for the help!
> Here your patch fix the issue.  Maybe you just have tested the patch
> more carefuly than me; I just run some `grep-find' commands and I keep
> always inside my window.

It kind of improves something, but the behavior is still wonky and 
counter-intuitive. Here are my steps:

1. Start emacs -Q, keep the window size it started with (small-ish).

2. Run grep-find with your proposed command line. That splits the 
window, putting the Grep buffer into the bottom window.

3. 'C-x o' to switch to the bottom window. The first match here is:

./lisp/gnus/ChangeLog.3:18140:	 
name*0*=us-ascii''~%2ffoo%2fbar%2fbaz%2fxyzzy%2f;

4. Press 'n' once. That displays ChangeLog.3 in the upper window.

5. Press 'n' again. The fails to move the cursor in the bottom window, 
*and* it shows the definition of nntp-accept-process-output in the top 
window. Most likely because the next entry in ChangeLog.3 refers to that 
function.

6. Press 'n' again, that displays the next Grep result (lisp/ChangeLog.13).

Without step 5, everything would be in order. Unfortunately, it's 
consistent and easy to reproduce. Unfortunately again, if you backtrack 
with 'p' and press 'n' again, you won't get the same behavior, you will 
get the "correct" one instead.