* bug#19553: 25.0.50; vertical-motion returns erroneous positive value
@ 2015-01-10 6:21 Dmitry Gutov
2015-01-10 13:06 ` Eli Zaretskii
2015-01-10 13:24 ` Eli Zaretskii
0 siblings, 2 replies; 5+ messages in thread
From: Dmitry Gutov @ 2015-01-10 6:21 UTC (permalink / raw)
To: 19553
1. Create an empty buffer.
2. Create an overlay at the end of it with a tricky after-string:
(setq my-ov (make-overlay (point-max) (point-max) nil t t))
(overlay-put my-ov 'after-string "~\n~\n~")
3. Move point to the end of the buffer (it will be rendered after the
display string; not sure if it's a bug).
4. Evaluate (vertical-motion 1). Point won't move (it has nowhere to
go), but the function call with return 2. Repeat indefinitely.
It's apparently an old bug, but it's been reported in
https://github.com/company-mode/company-mode/issues/274 two days ago,
because it causes an error in company-mode's popup rendering code when
used together with a new-ish package.
(I think I have a workaround, though, if this only happens at eob).
In GNU Emacs 25.0.50.25 (x86_64-unknown-linux-gnu, GTK+ Version 3.12.2)
of 2015-01-05 on axl
Repository revision: 1ac42bca8886267dac029a2f19df1a43313e0d95
Windowing system distributor `The X.Org Foundation', version 11.0.11601901
System Description: Ubuntu 14.10
^ permalink raw reply [flat|nested] 5+ messages in thread
* bug#19553: 25.0.50; vertical-motion returns erroneous positive value
2015-01-10 6:21 bug#19553: 25.0.50; vertical-motion returns erroneous positive value Dmitry Gutov
@ 2015-01-10 13:06 ` Eli Zaretskii
2015-01-10 20:34 ` Dmitry Gutov
2015-01-10 13:24 ` Eli Zaretskii
1 sibling, 1 reply; 5+ messages in thread
From: Eli Zaretskii @ 2015-01-10 13:06 UTC (permalink / raw)
To: Dmitry Gutov; +Cc: 19553
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Sat, 10 Jan 2015 09:21:12 +0300
>
> 1. Create an empty buffer.
>
> 2. Create an overlay at the end of it with a tricky after-string:
>
> (setq my-ov (make-overlay (point-max) (point-max) nil t t))
> (overlay-put my-ov 'after-string "~\n~\n~")
>
> 3. Move point to the end of the buffer (it will be rendered after the
> display string; not sure if it's a bug).
>
> 4. Evaluate (vertical-motion 1). Point won't move (it has nowhere to
> go), but the function call with return 2. Repeat indefinitely.
>
> It's apparently an old bug, but it's been reported in
> https://github.com/company-mode/company-mode/issues/274 two days ago,
> because it causes an error in company-mode's popup rendering code when
> used together with a new-ish package.
Fixed in commit b544ab5 on the emacs-24 branch.
Thanks.
^ permalink raw reply [flat|nested] 5+ messages in thread
* bug#19553: 25.0.50; vertical-motion returns erroneous positive value
2015-01-10 6:21 bug#19553: 25.0.50; vertical-motion returns erroneous positive value Dmitry Gutov
2015-01-10 13:06 ` Eli Zaretskii
@ 2015-01-10 13:24 ` Eli Zaretskii
2015-01-11 2:02 ` Stefan Monnier
1 sibling, 1 reply; 5+ messages in thread
From: Eli Zaretskii @ 2015-01-10 13:24 UTC (permalink / raw)
To: Dmitry Gutov; +Cc: 19553
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Sat, 10 Jan 2015 09:21:12 +0300
>
> 1. Create an empty buffer.
>
> 2. Create an overlay at the end of it with a tricky after-string:
>
> (setq my-ov (make-overlay (point-max) (point-max) nil t t))
> (overlay-put my-ov 'after-string "~\n~\n~")
>
> 3. Move point to the end of the buffer (it will be rendered after the
> display string; not sure if it's a bug).
Sorry, forgot to answer that question: no, it's not a bug. We always
display the cursor _after_ overlay strings.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2015-01-11 2:02 UTC | newest]
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2015-01-10 6:21 bug#19553: 25.0.50; vertical-motion returns erroneous positive value Dmitry Gutov
2015-01-10 13:06 ` Eli Zaretskii
2015-01-10 20:34 ` Dmitry Gutov
2015-01-10 13:24 ` Eli Zaretskii
2015-01-11 2:02 ` Stefan Monnier
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