Bug 259674

Summary:	unionRect(const Vector<LayoutRect>&) behaves incorrectly with empty rects
Product:	WebKit	Reporter:	Simon Fraser (smfr) <simon.fraser>
Component:	Layout and Rendering	Assignee:	Simon Fraser (smfr) <simon.fraser>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	bfulgham, simon.fraser, webkit-bug-importer, zalan
Priority:	P2	Keywords:	InRadar
Version:	WebKit Local Build
Hardware:	Unspecified
OS:	Unspecified

Description Simon Fraser (smfr) 2023-07-31 20:45:05 PDT

unionRect(const Vector<LayoutRect>&) behaves incorrectly if the input vector contains a single zero-size rect with a non-zero location; it will union with the empty rect, and therefore return the empty rect.

Comment 1 Radar WebKit Bug Importer 2023-07-31 20:45:36 PDT

<rdar://problem/113183595>

Comment 2 Simon Fraser (smfr) 2023-07-31 20:48:17 PDT

Pull request: https://github.com/WebKit/WebKit/pull/16267

Comment 3 EWS 2023-08-01 09:31:24 PDT

Committed 266479@main (0ab891185786): <https://commits.webkit.org/266479@main>

Reviewed commits have been landed. Closing PR #16267 and removing active labels.