Error when trying to pop up the completion window over a sufficiently long after-string overlay at the end of buffer

[jmickelin]

I'm getting the following error when company-mode tries to show the completion window right before an overlay on (point-max) that has the after-string property containing more than one line:

Company: Front-end company-pseudo-tooltip-unless-just-one-frontend error "Invalid search bound (wrong side of point)" on command post-command

Steps to reproduce:

1. Run

   (setq my-ov (make-overlay (point-max) (point-max) nil t t))
   (overlay-put my-ov 'after-string "~\n~\n~")

2. Put cursor on any line at most 10 lines before the end of buffer.

3. Try to type a prefix to a completion.

The error seems to be caused by the call to (vertical-motion 1) in company-buffer-lines reporting that it has moved more than 1 line forward, when the point actually only moved at most one line. This seems to be fixed by replacing vertical-motion with the functionally equivalent (?) function (lambda (n) (- n (forward-line n))).

[dgutov]

Thanks, I see the error.

replacing vertical-motion with the functionally equivalent (?) function (lambda (n) (- n (forward-line n)))

Alas, not equivalent: forward-line moves by physical lines, whereas vertical-motion uses the visual lines. And we want the latter.

[dgutov]

@jmickelin I've pushed a workaround. Please see if it helps with your package.

[dgutov]

Anyway, I can see it does.

The recent commit in emacs-24 Emacs branch also fixed a smaller glitch with the last buffer character being hidden in certain similar circumstances.

[jmickelin]

Thank you!