727453 - Facebook mobile page is displayed blank due to a -9999999px value in CSS

Status: RESOLVED DUPLICATE of bug 714709

(Core :: Graphics, defect)

Description

[Camelia Urian]

Build: Fennec/13.0a1 2012-02-15
Device: HTC Desire (Android 2.2)

Steps to reproduce:
1. Go to Facebook.com and wait to be redirected to m.facebook.com.
2. Wait for the page to be completely loaded and scroll the page or change the device orientation.

Expected results:
The content is correctly displayed.

Actual results:
The page becomes completely blank. Changing the orientation again repaints the page correctly but when doing a new scroll or orientation change the page becomes blank again.

Notes:
 - The issue is not reproducible on the Android browser.
 - See video at: http://www.youtube.com/watch?v=Bze8nXFVmCY&feature=plcp&context=C361e7a1UDOEgsToPDskJ4vODsGN4DS13W6dxwebXG

Comment 1

[Aaron Train [:aaronmt]]

Attachment: Nightly (02/15)

I was just about to file this too. I see it on the Galaxy Nexus (Android 4.0.2). Attaching a log but I'm not sure if there's anything interesting in it.

Comment 2

[Aaron Train [:aaronmt]]

Good - 20120203031138
http://hg.mozilla.org/mozilla-central/rev/e777c939a3f9

Bad - 20120204031137
http://hg.mozilla.org/mozilla-central/rev/766a59650976

http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=e777c939a3f9&tochange=766a59650976

Comment 3

[Martijn Wargers (dead)]

I'm also seeing this bug on the Galaxy Nexus (Android 4.0.2), but for me it's much worse.
Basically every page shows up blank for me, except about:home.

Comment 4

[Aaron Train [:aaronmt]]

Requesting higher priority because it is a top-site issue.

Comment 5

[Aaron Train [:aaronmt]]

Video: http://www.youtube.com/watch?v=-Qz_5mW0JlM&hd=1

Comment 6

[Martijn Wargers (dead)]

Attachment: testcase

I think I can reproduce it with this testcase.
Steps to reproduce:
- Change orientation to horizontal
- Change orientation to vertical
- Change orientation horizontal

After that, the text on the page has become invisible.

Comment 7

[Aaron Train [:aaronmt]]

Ok so the issue is the styling 

They are serving Fennec this: i.img u{position:absolute;top:-9999999px}, and Fennec chokes on the negative value.

This is very much similar to bug 714709.

Comment 8

[Aaron Train [:aaronmt]]

I have no idea why the summary changed a bunch of times, sorry.

Comment 9

[Boris Zbarsky [:bzbarsky]]

So is this a layout issue, or bad UA sniffing on their end?

Comment 10

[Martijn Wargers (dead)]

This is a Fennec layout issue, see testcase and steps to reproduce in comment 6.

Comment 11

[Boris Zbarsky [:bzbarsky]]

Ah, I see.  That seems highly unlikely to be a layout issue.  Much more likely, we're ending up with a cairo context in an error state or something.