Closed Bug 1365831 Opened 8 years ago Closed 8 years ago

dynamic layout change that resizes conditionally processed outer SVG triggers "expected aContainer to be NS_FRAME_IS_DIRTY" assertion

Categories

(Core :: SVG, defect)

defect
Not set
normal

Tracking

()

RESOLVED FIXED
mozilla55
Tracking Status
firefox55 --- fixed

People

(Reporter: dbaron, Assigned: dbaron)

References

Details

Attachments

(1 file)

No description provided.
The primary patch in bug 1308876 causes frames to be reflowed less often with NS_FRAME_IS_DIRTY, particularly when multiple passes of reflow are required for the frame or one of its ancestors (which is generally the case for a document that ends up not having scrollbars). This change causes this assert to fire on various SVG tests such as layout/reftests/svg/svg-integration/conditions-outer-svg-01.xhtml . This happens because the outer SVG with conditional processing (in this test, systemLanguage="x") is reflowed due to its parent resizing, without NS_FRAME_IS_DIRTY set. This is a relatively normal thing to happen during reflow; we just didn't have any tests that exercise it. This patch adds a crashtest that triggers the assertion through the same mechanism, but with a dynamic change, rather than depending on the non-dirty reflow triggered by bug 1308876. (I confirmed locally that this test does trigger the assertion without this patch, when run in the crashtest harness.) I think fundamentally the assertion isn't valid, and we should instead be testing the condition that it asserts. (But I'm a little concerned that maybe we need resize reflows to be propagated through?) MozReview-Commit-ID: D8hjAbjKyuL
Attachment #8868844 - Flags: review?(cam)
(In reply to David Baron :dbaron: ⌚️UTC-7 from comment #1) > I think fundamentally the assertion isn't valid, and we should instead > be testing the condition that it asserts. (But I'm a little concerned > that maybe we need resize reflows to be propagated through?) To clarify this: I think the two obvious options are: (1) remove the assertion, and replace it with the test, as this patch does (2) remove the assertion, and replace it with nothing
Comment on attachment 8868844 [details] [diff] [review] Replace assertion that non-display SVG containers are only reflowed with NS_FRAME_IS_DIRTY with a real test of the condition Review of attachment 8868844 [details] [diff] [review]: ----------------------------------------------------------------- Thanks for the explanation, which makes sense to me.
Attachment #8868844 - Flags: review?(cam) → review+
https://hg.mozilla.org/integration/mozilla-inbound/rev/4808d8fe4ea887a468fc8f1083ee51ef20f4d6ce Bug 1365831 - Replace assertion that non-display SVG containers are only reflowed with NS_FRAME_IS_DIRTY with a real test of the condition. r=heycam
Status: ASSIGNED → RESOLVED
Closed: 8 years ago
Resolution: --- → FIXED
Target Milestone: --- → mozilla55
Type: enhancement → defect
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