Created attachment 364640 [details] testcase (crashes debug Firefox when loaded) ###!!! ABORT: comparing iterators over different lists: 'mListLink == aOther.mListLink', file /Users/jruderman/central/layout/base/../generic/nsLineBox.h, line 684
Still happens on mozilla-central.
Still aborts debug builds. Seems harmless on opt.
I've seen this on whatwg for linux/mac at http://www.whatwg.org/specs/web-apps/current-work/ It is not reliable on this particular url, but spidering the anchors will almost always reproduce it. http://www.whatwg.org/specs/web-apps/current-work/#attr-time-datetime http://www.whatwg.org/specs/web-apps/current-work/#meta http://www.whatwg.org/specs/web-apps/current-work/#the-canvas The page appears to contain each of the elements of Jesse's test case. The data from crash-stats for this url in April shows the related signatures: (counts are for the last week) nsBulletFrame::GetListItemText 207 crashes (all Windows) nsTextFrame::EnsureTextRun 107 crashes (most Windows, some Mac, Linux) CompositeDataSourceImpl::cycleCollection::UnmarkPurple 3094 crashes (all Windows)
So what happens here is that nsCSSRendering::PaintBackgroundWithSC calls PrepareBackgroundLayer which calls InlineBackgroundData::GetContinuousRect, which calls IsOnSameLine for two frames that are in different columns, which fails the assertion. Ideally we'd just check whether the two frames are in the same block, but that could be somewhat expensive.... I suppose we could check that just when the frames have different parents or something.
Created attachment 541902 [details] [diff] [review] With a comment typo fixed
Comment on attachment 541902 [details] [diff] [review] With a comment typo fixed Review of attachment 541902 [details] [diff] [review]: -----------------------------------------------------------------
Interesting effect on m-i. The crashtest.list was asserts(6) load 479360-1.xhtml # Bug 439258 load 481806-1.html asserts(6) load 483604-1.xhtml # Bug 439258 and when you inserted another one in between, 483604-1.xhtml stopped getting its expected 6 assertion failures, and 481806-1.html got 6 unexpected ones. Apparently that annotation on 479360-1.xhtml needs to be "asserts(6), forces-asserts-on-not-the-next-but-the-one-after-that(6)".
(In reply to comment #9) > http://hg.mozilla.org/integration/mozilla-inbound/rev/bba3ada5314c Backed out due to perma-orange on the new test: http://tbpl.mozilla.org/?tree=Mozilla-Inbound&rev=cfa057a48b48
s/perma-orange on the new test/perma-orange because a previous test, the harness, and|or editor is broken/
> Apparently that annotation on 479360-1.xhtml needs to be I made that into a comment and rejiggered the annotations. Then pushed this again as http://hg.mozilla.org/integration/mozilla-inbound/rev/062b3f071f81