Bug 313379

Summary:

ASSERTION FAILED: partialRun.length < trailingInlineTextItem.length()

Product:

WebKit

Reporter:

Fujii Hironori <fujii>

Component:

Layout and Rendering

Assignee:

alan <zalan>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

bfulgham, jean-yves.avenard, koivisto, simon.fraser, webkit-bug-importer, zalan

Priority:

Keywords:

InRadar

Version:

WebKit Nightly Build

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Test reduction	none
[fast-cq]Patch	none

Fujii Hironori

Reported 2026-04-26 20:41:54 PDT

While browsing some web sites with GTK Release build with assertion enabled of 312060@main, I saw assertion failures. https://hatena.blog/ https://weather.yahoo.co.jp/weather/jp/13/4410.html ASSERTION FAILED: partialRun.length < trailingInlineTextItem.length() ../../../Source/WebCore/layout/formattingContexts/inline/InlineLineBuilder.cpp(1840) : LineBuilder::Result WebCore::Layout::LineBuilder::processLineBreakingResult(LineCandidate &, const InlineItemRange &, const InlineContentBreaker::Result &) 1 0x7f6f0380c510 WebCore::Layout::LineBuilder::processLineBreakingResult(WebCore::Layout::LineCandidate&, WebCore::Layout::InlineItemRange const&, WebCore::Layout::InlineContentBreaker::Result const&) 2 0x7f6f0380ba20 WebCore::Layout::LineBuilder::tryPlacingCandidateInlineContentOnLine(WebCore::Layout::InlineItemRange const&, WebCore::Layout::LineCandidate&) 3 0x7f6f0380b349 WebCore::Layout::LineBuilder::handleInlineContent(WebCore::Layout::InlineItemRange const&, WebCore::Layout::LineCandidate&) 4 0x7f6f03805496 WebCore::Layout::LineBuilder::placeInlineAndFloatContent(WebCore::Layout::InlineItemRange const&) 5 0x7f6f03802e8e WebCore::Layout::LineBuilder::layoutInlineContent(WebCore::Layout::LineInput const&, std::optional<WebCore::Layout::PreviousLine> const&, bool) 6 0x7f6f0380efaa WebCore::Layout::IntrinsicWidthHandler::computedIntrinsicWidthForConstraint(WebCore::Layout::IntrinsicWidthMode, WebCore::Layout::AbstractLineBuilder&, WebCore::Layout::IntrinsicWidthHandler::MayCacheLayoutResult) 7 0x7f6f0380e810 WebCore::Layout::IntrinsicWidthHandler::minimumContentSize() 8 0x7f6f037df8de WebCore::Layout::InlineFormattingContext::minimumMaximumContentSize(WebCore::Layout::InlineDamage*) 9 0x7f6f0386d7ef WebCore::LayoutIntegration::LineLayout::computeIntrinsicWidthConstraints() 10 0x7f6f042af84d WebCore::RenderBlockFlow::tryComputePreferredWidthsUsingInlinePath(WebCore::LayoutUnit&, WebCore::LayoutUnit&) 11 0x7f6f04291a38 WebCore::RenderBlockFlow::computeInlinePreferredLogicalWidths(WebCore::LayoutUnit&, WebCore::LayoutUnit&) const 12 0x7f6f0429186a WebCore::RenderBlockFlow::computeIntrinsicLogicalWidths(WebCore::LayoutUnit&, WebCore::LayoutUnit&) const 13 0x7f6f04288694 WebCore::RenderBlock::computePreferredLogicalWidths() 14 0x7f6f042b7534 WebCore::RenderBox::minPreferredLogicalWidth() const 15 0x7f6f042db11b WebCore::RenderDeprecatedFlexibleBox::computeIntrinsicLogicalWidths(WebCore::LayoutUnit&, WebCore::LayoutUnit&) const 16 0x7f6f042db524 WebCore::RenderDeprecatedFlexibleBox::computePreferredLogicalWidths() 17 0x7f6f042b7534 WebCore::RenderBox::minPreferredLogicalWidth() const 18 0x7f6f042895bf WebCore::RenderBlock::computeChildIntrinsicLogicalWidths(WebCore::RenderBox&, WebCore::LayoutUnit&, WebCore::LayoutUnit&) const 19 0x7f6f04289211 WebCore::RenderBlock::computeChildPreferredLogicalWidths(WebCore::RenderBox&, WebCore::LayoutUnit&, WebCore::LayoutUnit&) const 20 0x7f6f0428796c WebCore::RenderBlock::computeBlockPreferredLogicalWidths(WebCore::LayoutUnit&, WebCore::LayoutUnit&) const 21 0x7f6f04291827 WebCore::RenderBlockFlow::computeIntrinsicLogicalWidths(WebCore::LayoutUnit&, WebCore::LayoutUnit&) const 22 0x7f6f04288694 WebCore::RenderBlock::computePreferredLogicalWidths() 23 0x7f6f042b7534 WebCore::RenderBox::minPreferredLogicalWidth() const 24 0x7f6f042895bf WebCore::RenderBlock::computeChildIntrinsicLogicalWidths(WebCore::RenderBox&, WebCore::LayoutUnit&, WebCore::LayoutUnit&) const 25 0x7f6f04289211 WebCore::RenderBlock::computeChildPreferredLogicalWidths(WebCore::RenderBox&, WebCore::LayoutUnit&, WebCore::LayoutUnit&) const 26 0x7f6f0428796c WebCore::RenderBlock::computeBlockPreferredLogicalWidths(WebCore::LayoutUnit&, WebCore::LayoutUnit&) const 27 0x7f6f04291827 WebCore::RenderBlockFlow::computeIntrinsicLogicalWidths(WebCore::LayoutUnit&, WebCore::LayoutUnit&) const 28 0x7f6f04288694 WebCore::RenderBlock::computePreferredLogicalWidths() 29 0x7f6f042b7534 WebCore::RenderBox::minPreferredLogicalWidth() const 30 0x7f6f04201970 WebCore::GridTrackSizingAlgorithmStrategy::minContentContributionForGridItem(WebCore::RenderBox&, WebCore::RenderGridLayoutState&) const 31 0x7f6f041feebd WebCore::GridTrackSizingAlgorithmStrategy::minContributionForGridItem(WebCore::RenderBox&, WebCore::RenderGridLayoutState&) const

Attachments
Test reduction (174 bytes, text/html) 2026-04-27 07:53 PDT, alan	no flags	Details
[fast-cq]Patch (6.98 KB, patch) 2026-04-27 08:46 PDT, alan	no flags	Details Formatted Diff Diff
View All Add attachment proposed patch, testcase, etc.

alan

Comment 1 2026-04-27 07:53:16 PDT

Created attachment 479334 [details] Test reduction

alan

Comment 2 2026-04-27 08:46:30 PDT

Created attachment 479336 [details] [fast-cq]Patch

EWS

Comment 3 2026-04-27 13:03:45 PDT

Committed 312130@main (daecd76b2488): <https://commits.webkit.org/312130@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 479336 [details].

Radar WebKit Bug Importer

Comment 4 2026-04-27 13:04:12 PDT

<rdar://problem/175701009>

alan

Comment 5 2026-05-07 11:50:51 PDT

*** Bug 312845 has been marked as a duplicate of this bug. ***

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