1911507 - [wpt-sync] Sync PR 47448 - [layout] Fix null-deref when attempting to mark a scrollbar for layout

Status: RESOLVED FIXED

(Core :: Layout: Scrolling and Overflow, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 47448 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/47448
Details from upstream follow.

Ian Kilpatrick <[e-mail]> wrote:

[layout] Fix null-deref when attempting to mark a scrollbar for layout

Custom scrollbar parts are weird in that they don't have a parent.
We'd unconditionally attempt to access their containing block
causing a null-deref.

Fixed: 355016913
Change-Id: I9c32cf7efc00543021111bb3eaa1e8488052264f
Reviewed-on: https://chromium-review.googlesource.com/5760674
WPT-Export-Revision: faa4e25e52834d8a26d81add68594e10fc51a635

Comment 1

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=468f4a596719f4fd03e4debc4dba668855bd5bb0

Comment 2

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

CI Results

Ran 9 Firefox configurations based on mozilla-central, and Firefox, Chrome, and Safari on GitHub CI

Total 1 tests

Status Summary

Firefox

PASS : 1

Chrome

CRASH: 1

Safari

PASS : 1

Links

Gecko CI (Treeherder)
GitHub PR Head
GitHub PR Base

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/71832f028fa0
[wpt PR 47448] - [layout] Fix null-deref when attempting to mark a scrollbar for layout, a=testonly

Comment 4

[Narcis Beleuzu [:NarcisB]]

https://hg.mozilla.org/mozilla-central/rev/71832f028fa0