1434127 - Inorrect Japanese character in Yu Gothic font using standard variant sequence

Status: ASSIGNED

(Web Compatibility :: Site Reports, defect, P5)

Description

[Łukasz Korczewski]

Attachment: Screenshot_1.png

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0
Build ID: 20180103231032

Steps to reproduce:

I created a webpage containing the following sequence: "爛︀" a character and standard variant selector #1. I displayed the page in FF using Yu Gothic.


Actual results:

The character displayed is an unrelated character looking like: 欄.
Chrome and Internet Explorer displays the character correctly.


Expected results:

The character should be exactly the same as without the variant selector, that is: 爛.

Comment 1

[Alice0775 White]

https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=feae125fca6f&tochange=864067766916

Triggered by: 9d08e98cc18c	Masatoshi Kimura — Bug 989557 - Implement a fallback for CJK Compatibility Ideographs Standardized Variants. r=jfkthame

Comment 2

[Alice0775 White]

Attachment: sample html

Yu Gothic is incorrect.

Comment 3

[Masatoshi Kimura [:emk]]

Attachment: sample html using compatibility ideograph code point (not VS)

Yeah, Yu Gothic has a wrong glyph at U+F91E. Firefox just replaces U+721B U+FE00 with U+F91E because they are supposed to be identical. This is a font issue, not a Firefox one.

Comment 4

[Masatoshi Kimura [:emk]]

Sent a feedback: https://aka.ms/Pehi91

Comment 5

[Jonathan Watt [:jwatt]]

Mass bug change to replace various 'parity' whiteboard flags with the new canonical keywords. (See bug 1443764 comment 13.)

Comment 6

[Firefox Bug Husbandry Bot]

See bug 1547409. Moving webcompat whiteboard tags to keywords.

Comment 7

[Raul Bucata]

After some research, using codepen.io and even introducing the URL in the toolbar, there is a difference in rendering.

Tested with:

Browser / Version: Firefox Nightly 101.0a1 (2022-04-08) (64-bit) / Chrome Version 100.0.4896.75 (Official Build) (64-bit)
Operating System: Windows 10 PRO x64

Notes:

1. Reproducible regardless of the status of ETP.
2. Reproducible on the latest build of Firefox Nightly.
3. Works as expected using Chrome.

Comment 8

[BugBot [:suhaib / :marco/ :calixte]]

Clear a needinfo that is pending on an inactive user.

Inactive users most likely will not respond; if the missing information is essential and cannot be collected another way, the bug maybe should be closed as INCOMPLETE.

For more information, please visit auto_nag documentation.