Bug 285404

Summary: Assertion when using any of the following units with canvas ctx.letterSpacing/ctx.wordSpacing: lh, rlh, cqw, cqh, cqi, cqb, cqmin, cqmax
Product: WebKit Reporter: Sam Weinig <sam>
Component: New BugsAssignee: Sam Weinig <sam>
Status: RESOLVED FIXED    
Severity: Normal CC: webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari 18   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Test case (will assert in debug builds) none

Sam Weinig
Reported 2025-01-05 13:16:34 PST
WebKit will assert when using any of the following units with canvas ctx.letterSpacing/wordSpacing (lh, rlh, cqw, cqh, cqi, cqb, cqmin, cqmax).
Attachments
Test case (will assert in debug builds) (810 bytes, text/html)
2025-01-05 13:41 PST, Sam Weinig
no flags
Sam Weinig
Comment 1 2025-01-05 13:41:04 PST
The HTML spec doesn't say what these units (or really any <length> units) should do, so for now, just going to make non-absolute and non-font-relative units bail. Filed https://github.com/whatwg/html/issues/10893 for HTML spec issue.
Sam Weinig
Comment 2 2025-01-05 13:41:51 PST
Created attachment 473783 [details] Test case (will assert in debug builds)
Sam Weinig
Comment 3 2025-01-05 13:59:43 PST
EWS
Comment 4 2025-01-06 09:04:16 PST
Committed 288468@main (ddefac0cb41f): <https://commits.webkit.org/288468@main> Reviewed commits have been landed. Closing PR #38547 and removing active labels.
Radar WebKit Bug Importer
Comment 5 2025-01-06 09:05:15 PST
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