1931997 - The graphics for the error pages do not render correctly

Status: RESOLVED WORKSFORME

(Firefox for Android :: Browser Engine, defect)

Description

[Jonathan Almeida [:jonalmeida]]

Steps to reproduce

1. Load any url that leads to an 'Address not found' error.
2. Observe

Expected behaviour

• The error page should have a graphics of a smiley face with eyes and a mouth.

Actual behaviour

• The error page shows the smiley face eyes and the mouth but the rest of it is missing.

Device information

• Firefox version: All versions from 132 at least from my testing across all browsers (Fenix/Focus/Reference Browser).
• Android device model: All devices
• Android OS version: Tested Android 14 and Android 15.

Any additional information?

n/a

Comment 1

[Jonathan Almeida [:jonalmeida]]

Attachment: Screenshot_20241117-140544.png

Screenshot of the error page graphics unrecognizable on Fenix Nightly 134.

Comment 2

[Ryan VanderMeulen [:RyanVM]]

Jon, can you please add a regression window to this bug if/when you get one? Also, can you please add the URL to the bug where you're seeing it?

Comment 3

[Ryan VanderMeulen [:RyanVM]]

I nuked my Fenix Nightly profile on my phone to get it, but I get this regression range from mozregression:

3:27.81 INFO: Narrowed nightly regression window from [2023-04-28, 2023-04-30] (2 days) to [2023-04-28, 2023-04-29] (1 days) (~0 steps left)
3:27.81 INFO: Got as far as we can go bisecting nightlies...
3:27.81 ERROR: Sorry, but mozregression was unable to get a repository - no pushlog url available.
3:27.81 INFO: Newest known good nightly: 2023-04-28
3:27.81 INFO: Oldest known bad nightly: 2023-04-29

https://github.com/mozilla-mobile/firefox-android/commits/main/?since=2023-04-27&until=2023-04-29

Comment 4

[Ryan VanderMeulen [:RyanVM]]

GeckoView regression range looks approximately like this:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=381bc623c234&tochange=fa6ba4b8c59f

I forgot to check the exact revs those builds came from so I'm afraid I can't narrow it down much more than that.

Comment 5

[Jonathan Almeida [:jonalmeida]]

Thanks for doing this. I don't think I would have done any better. :)

Comment 6

[Jeff Boek [:boek]]

I just re-installed Nightly to try to reproduce this and I wasn't able to on my Pixel or S22. I tested in light mode and dark mode as well.

Jon, do you have any other insights on how to get into this state?

Comment 7

[Jonathan Almeida [:jonalmeida]]

No, I don't. I have tried this on several of our apps with my Pixel 8a and a Samsung A54. It seems to be reproducible for ryanvm too (offline said he has a Pixel 7).

Can you confirm you are seeing the same error page by going to a site that is down (I smash the keyboard and end up with something like eirgnerligbweg.com to reach a non-existent site)?

Comment 8

[Ryan VanderMeulen [:RyanVM]]

I was just using foo.bar to test.

Comment 9

[Jeff Boek [:boek]]

Attachment: A54 Repro.mp4

I smash the keyboard and end up with something like eirgnerligbweg.com to reach a non-existent site

That's what I did. Here is a recording of a fresh install of Nightly on my A54 (Running Android 12). I see the same behavior on my S22 and Pixel Fold on Android 14 and 13.

Comment 10

[Jonathan Almeida [:jonalmeida]]

Yup, you are seeing the bug reproduced. The smiley should have a face, but you are only seeing the eyes and mouth. Here is the resource SVG: https://searchfox.org/mozilla-central/source/mobile/android/android-components/components/ui/icons/src/main/assets/mozac_error_confused.svg

Comment 11

[Jeff Boek [:boek]]

Ahah! In your screenshot there was no other content so that was what was concerning to me. Good catch, we'll find out what happened here

Comment 12

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

The severity field is not set for this bug.
:boek, could you have a look please?

For more information, please visit BugBot documentation.

Comment 13

[Segun Famisa [:segun]]

Is anyone still able to repro this? I'm not able to reproduce it. I have tried on my emulator running Android 14, and Samsung S25 running Android 15, and Google Pixel 9 Pro running Android 16

I also had a look at the SVG, and where we generate the HTML page, and it looks...okay to me, don't see anything suspicious.

I wonder if this has to do with the SVG itself, or gecko rendering. My problem right now is that I'm unable to reproduce it

Comment 14

[Ryan VanderMeulen [:RyanVM]]

Yeah, this seems to have been fixed starting with 139. I haven't bisected Nightly builds to find the exact fix, however.

Comment 15

[Ryan VanderMeulen [:RyanVM]]

Using mozregression --find-fix, I was able to narrow it down to the the 2025-04-03 Nightly build. Pushlog range:
https://hg-edge.mozilla.org/mozilla-central/pushloghtml?fromchange=6be6a06991d7&tochange=e06e468f2d56

Bug 1957689 maybe? Or maybe one of the extension function changes from bug 1958138?

Comment 16

[Jonathan Almeida [:jonalmeida]]

Closing since this is no longer reproducible (probably bug 1957689).