fune/testing/web-platform/tests/css/css-layout-api/multicol-details-crash.https.html
Morten Stenshorne 9fd42f9d55 Bug 1716851 [wpt PR 29403] - Properly disallow custom layout + multicol., a=testonly
Automatic update from web-platform-tests
Properly disallow custom layout + multicol.

Checking LayoutObject type won't do, since we don't always create a
LayoutNGCustom object (e.g. if it's a DETAILS element (but, then again,
should we allow custom layout on those???)). Check display type instead.

The reason for the crash was that we ended up creating a
LayoutNGBlockFragmentation multicol container inside a legacy multicol
container, even when LayoutNGBlockFragmentation is disabled (custom
layout forces LayoutNG). We don't create a paint layer on the flow
thread (nor the multicol container) in LayoutNGBlockFragmentation, which
the legacy pre-paint code assumes.

Bug: 1219874
Change-Id: I26fcd8d4a5fd51ce1799b207bf39b8e322890ca9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2964675
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Commit-Queue: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/master@{#893340}

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wpt-commits: 944917215322834033024fa37ce58eb13c2fa3ee
wpt-pr: 29403
2021-06-26 22:32:55 +00:00

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<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1219874">
<div style="columns:2;">
<details style="display:layout(foo); columns:2;"></details>
</div>