1416242 - Hyperlinks with "text-decoration: underline" propriety are missing the underline when not in view

Status: RESOLVED WORKSFORME

(Core :: Layout: Text and Fonts, defect)

Description

[Cosmin Muntean [:cmuntean], Ecosystem QA]

Attachment: links.html

[Notes]:
- I have noticed this issue on Test Pilot website (https://testpilot.firefox.com/). See this screen recording: https://goo.gl/vMwsDa

[Affected versions]:
- Nightly 58.0a1, Build ID: 20171109220104

[Affected Platforms]:
- All Windows
- All Mac OS
- All Linux

[Steps to reproduce]:
1. Open the attached test case in the latest Nightly build.
2. Observe the "Terms of Use" and "Privacy Notice" links from the top and the bottom part of the page.
3. Refresh the page.
4. Observe the "Terms of Use" and "Privacy Notice" links from the top and the bottom of the page.

[Expected result]:
Step 2 & Step 4. The links from the top and the bottom are correctly underlined.

[Actual result]:
Step 2: The top links are underlined and the bottom links are not underlined.
Step 4: The top links are not underlined and the bottom links are underlined.

[Regression]:
- The issue is not reproducible on latest Beta build. Considering this I have performed a regression using mozregression tool. Here are the results:
Last good revision: 046aa4f8f7583671dc3c682e544a20e84eaf5478
First bad revision: fb90190ba5b1d880c743f90b7634397c8c3abe9b
Pushlog: https://goo.gl/jCWjgs
- From the provided pushlog it seems that the bug 1399310 introduced this issue. 

Tommy can you please take a look over this?

Comment 1

[Cosmin Muntean [:cmuntean], Ecosystem QA]

Attachment: screen recording of the issue.mp4

Comment 2

[Jonathan Kew [:jfkthame]]

This looks like a duplicate of bug 1415214, which recently landed on mozilla-inbound. Could you check whether you still see the issue with the latest inbound builds (or with mozilla-central after that bug is merged)?

Comment 3

[Cosmin Muntean [:cmuntean], Ecosystem QA]

I just tested this issue using the inbound build provided in bug 1415214 comment 39 and the issue is no longer reproducible.

I will check again after the fix will land.

Comment 4

[Cosmin Muntean [:cmuntean], Ecosystem QA]

Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:58.0) Gecko/20100101 Firefox/58.0
Firefox: 58.0a1, Build ID: 20171112220346

I have retested this issue after the fix from bug 1415214 landed in Nightly, and it's no longer reproducible.