Vscode: Link underlines blink

[allanchau]

Issue Type: Bug

Links in markdown documents are blinking.

VS Code version: Code 1.36.0 (0f3794b38477eea13fb47fbe15a42798e6129338, 2019-07-03T13:09:31.507Z)
OS version: Darwin x64 18.6.0

System Info

|Item|Value|
|---|---|
|CPUs|Intel(R) Core(TM) i7-8569U CPU @ 2.80GHz (8 x 2800)|
|GPU Status|2d_canvas: enabled
flash_3d: enabled
flash_stage3d: enabled
flash_stage3d_baseline: enabled
gpu_compositing: enabled
multiple_raster_threads: enabled_on
native_gpu_memory_buffers: enabled
oop_rasterization: disabled_off
protected_video_decode: unavailable_off
rasterization: enabled
skia_deferred_display_list: disabled_off
skia_renderer: disabled_off
surface_synchronization: enabled_on
video_decode: enabled
viz_display_compositor: disabled_off
webgl: enabled
webgl2: enabled|
|Load (avg)|2, 2, 2|
|Memory (System)|16.00GB (0.04GB free)|
|Process Argv|.|
|Screen Reader|no|
|VM|14%|

Extensions (18)

Extension|Author (truncated)|Version
---|---|---
npm-intellisense|chr|1.3.0
path-intellisense|chr|1.4.2
vscode-eslint|dba|1.9.0
EditorConfig|Edi|0.13.0
prettier-vscode|esb|1.9.0
auto-close-tag|for|0.5.6
auto-rename-tag|for|0.1.0
coldfusion|ili|1.0.1
docthis|joe|0.7.1
atom-keybindings|ms-|3.0.6
color-highlight|nau|2.3.0
code-spell-checker|str|1.7.17
vscode-status-bar-format-toggle|tom|1.5.0
sort-lines|Tyr|1.8.0
vscode-wakatime|Wak|2.1.2
quokka-vscode|Wal|1.0.233
highlight-bad-chars|wen|0.0.3
vscode-caddyfile-syntax|zam|1.0.1

[vscodebot[bot]]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• Allow to disable cursor blinking in input boxes (#70137)
  

[mjbvz]

Does this still happen if you disable all extensions?

[allanchau]

@mjbvz It's not happening with or without extensions today 🤷‍♂.

[alexwall]

@mjbvz
It's quite difficult to reproduce this issue:
The properbility is higher if:

1. I you edit other text, so not the link it self
2. If the file has some other content apart from the link
3. If the window is narrow, that the link is wrapped to the next line
4. Sometimes the last part of the link starts toggling (underline appears and disappears) when I click randomly inside the text document

See example:

I've just one extension in common with @allanchau

code-spell-checker

[alexwall]

Example file

# Markdown

gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.


- sea takimata sanctus est Lorem ipsum dolor sit amet.
- sea takimata sanctus est Lorem ipsum dolor sit amet.
- fjdskal; n fdsa f dsajkl ; 
- fdsa fjdla 
- fdjlsafd jskal;f jsa
- fd ajdksla; 
- djksla f  fdjksla; f ajfwj jfa  fdsaj jkfld;sajklf;dsaiw gjkflds;a fdsa
- fdsa fdsafdsa  fdsa f j
- [ ] #plan fdsa  fdjsaklf fdsa fdsa fdsa f jfdkls ajfksal;j
- [ ] #plan fdsjlfds aliweroo fsfdsa j fdsjkalow 
- sea takimata sanctus est Lorem ipsum dsfdsa
- **Edit something here and watch link decoration at the bottom**

## More text

- [ ] @todo 1 
- [ ] #next todo 2 fdjskal fj dksla;fj dklsajfja
- [ ] todo 3 

Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.     


- [ ] augue duis dolore te feugait nulla facilisi. https://www.longlonglong.com/long/long/path/multi/line/sporadic/issue 

Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. 

Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis. 

At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, At accusam aliquyam diam diam dolore dolores duo eirmod eos erat, et nonumy sed tempor et et invidunt justo labore Stet clita ea et gubergren, kasd magna no rebum. sanctus sea sed takimata ut vero voluptua. est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat. 

[jaoord]

I noticed the same in a JS file (react component):

[alexwall]

# Minikube on Archlinux

## System is up to date

 example text 
 example text


http://blog.programmableproduction.com/2018/03/08/Archlinux-Setup-Minikube-using-KVM 

VSCode Version:
Version 1.36.1 (1.36.1)

[rebornix]

A potential duplicate of https://github.com/microsoft/vscode/issues/48321

[andibakti]

I have the same issue in Java with vanilla vscode with no extensions
It only happens when I open the file and the cursor is on the first line of the editor

Version: 1.36.1

[iansan5653]

Experienced this with markdown the other day. Can't reproduce though.

[Keavon]

It seems to start happening when I visit another tab and then come back, with my text cursor on a nearby line to the link that starts blinking. It happens when the cursor was placed above the link, but seemingly not when it was placed below the link. It's happening in my HTML document.

[mlewand]

Sometimes I'm getting similar artifacts on Windows, so I guess it might be platform independent.

[alexilyaev]

Happens consistently for me.

• Still happens with Developer: Reload window with extensions disabled
• Can't reproduce in Code - Insiders

[veleek]

Just adding another repro to the list. I experienced it editing SASS files.

Just updated literally moments ago and was able to reproduce afterwards:

Version: 1.38.1 (system setup)
Commit: b37e54c98e1a74ba89e03073e5a3761284e3ffb0
Date: 2019-09-11T13:35:15.005Z
Electron: 4.2.10
Chrome: 69.0.3497.128
Node.js: 10.11.0
V8: 6.9.427.31-electron.0
OS: Windows_NT x64 10.0.18362

[elieux]

Seems easily reproducible in my brand new setup (no custom configuration).

Version: 1.38.1
Commit: b37e54c98e1a74ba89e03073e5a3761284e3ffb0
Date: 2019-09-11T13:35:15.005Z
Electron: 4.2.10
Chrome: 69.0.3497.128
Node.js: 10.11.0
V8: 6.9.427.31-electron.0
OS: Windows_NT x64 10.0.17763

[jhadida]

I am also experiencing this bug, and I can reproduce @elieux's post.

Here is the step-by-step recipe:

• Open a new window, and reload with extensions disabled.
• Open a new tab.
• Copy the text below (including the empty lines before/after).
• Paste it within the open tab, and quickly press the up-arrow key twice in order to place the cursor on the first line. By quickly, I mean that you should start pressing your arrow key _before_ the link becomes underlined at all.
• This should make the underline blink.

https://github.com/microsoft/vscode/issues/76642

[alexdima]

This also reproduces for me on Windows:

Also reproduces with --disable-gpu:

I could not reproduce on Chromium Version 69.0.3497.0.

The text is:

/*!
 * jQuery JavaScript Library v1.11.1
 * http://jquery.com/
 *
 * Includes Sizzle.js
 * http://sizzlejs.com/
 *
 * Copyright 2005, 2014 jQuery Foundation, Inc. and other contributors
 * Released under the MIT license
 * http://jquery.org/license
 *
 * Date: 2014-05-01T17:42Z
 */

[alexdima]

Also notice the layer borders, this is most definitely a bug in Chromium's rendering pipeline:

[alexdima]

I could eventually reproduce some funny business in Chromium Version 69.0.3497.0

[alexdima]

I could reproduce wierdness around text-decoration: underline in Chrome Canary and I have filed https://bugs.chromium.org/p/chromium/issues/detail?id=1012248

Possibly sharing the same root cause - #48321, #76642 and #79448

[roblourens]

I think this got worse in Electron 7, and I filed https://github.com/microsoft/vscode/issues/89042, and it seems better now that we are back in 6. Something to watch out for when we upgrade again.

[ultraGentle]

Since some time has passed, just wanted to add a note that I'm currently experiencing this bug.

(Details: VSC: 1.50.0, insiders. Untitled, unsaved file. No line numbers. Not all links blink.)

[karlhorky]

Looks like this was fixed two days ago in Chromium:

https://bugs.chromium.org/p/chromium/issues/detail?id=896295