1389054 - Blank white pages when bringing Fennec to foreground - with "Don't keep activities" ON

Status: VERIFIED FIXED

(Firefox for Android Graveyard :: General, defect)

Description

[Oana Horvath [:ohorvath]]

Attachment: recording1.mp4

Devices: 
Motorola Nexus 6 (Android 7.0)
Huawei Honor 5X (Android 5.1.1)

Build: Nightly 57.0a1 (2016-08-10);

Steps to reproduce:
1. Turn ON "Don't keep activities" in Developer settings.
2. Open Nightly and load a page. 
3. Minimize the app, open apps tray and reopen the app.

Expected result:
The page is loaded.

Actual result:
The page is loading but the screen is blank white. You can see the page was loaded in the tabs tray thumbnail.

Notes: Screen recording attached.

Comment 1

[Dylan Roeh (:droeh) (he/him)]

Ugh, probably fallout from bug 1382637.

Comment 2

[Jan Henning [:JanH]]

@Dylan, in case it helps: We've already got this (https://dxr.mozilla.org/mozilla-central/rev/b95b1638db48fc3d450b95b98da6bcd2f9326d2f/mobile/android/components/SessionStore.js#413) for a regular foregrounding.

Comment 3

[Jan Henning [:JanH]]

Actually that bit of code is running as expected - we get an "application-foreground" notification and the currently selected tab *is* restored - we just don't start painting for some reason.

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/mozilla-inbound/rev/147023f5aad0
Back out patch for bug 1382637 to fix broken behavior when "Don't keep activities" is enabled. r=snorp

Comment 5

[Jan Henning [:JanH]]

Patches with "back out" in the commit messages apparently aren't handled automatically.

https://hg.mozilla.org/mozilla-central/rev/147023f5aad0

Comment 6

[Oana Horvath [:ohorvath]]

Verified as fixed on Beta 56.0b3.
Devices: 
Motorola Nexus 6 (Android 7.0)