Bug 280034

Summary: Page crash in CSSCalcSymbolNode::doubleValue when using channel extracted from relative color syntax into a calc(pow()) expression
Product: WebKit Reporter: P <pierre>
Component: CSSAssignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Normal CC: koivisto, sam, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari 18   
Hardware: Mac (Apple Silicon)   
OS: macOS 15   
See Also: https://bugs.webkit.org/show_bug.cgi?id=278244
Attachments:
Description Flags
Crash log none

P
Reported 2024-09-19 18:42:38 PDT
Created attachment 472608 [details] Crash log Hello, I've been using the relative color syntax https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_colors/Relative_colors to manipulate the alpha level based on the oklch lightness of a given color. We have noticed that re-using one of the channel (Lightness in our case, but the same seems to happen for Chroma and Hue) inside a pow() function causes a complete crash of the page. Here's how to reproduce: - On Safari 18 - Navigate to https://svelte.dev/repl/ea2f7b1c06644275abaee5247b938a76?version=4.2.19 - Notice the --alpha expression works for the first 4 options - Notice crash on the bottom 3 options Attached a crash log of when the issue triggered. Thanks.
Attachments
Crash log (77.05 KB, text/plain)
2024-09-19 18:42 PDT, P 		no flags
Details
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Alexey Proskuryakov
Comment 1 2024-09-20 16:50:54 PDT
rdar://135787066
Sam Weinig
Comment 2 2024-09-25 09:23:20 PDT
Does not reproduce in ToT.
Sam Weinig
Comment 3 2024-09-25 09:24:49 PDT
From the crashlog, I think it is likely this was fixed with the calc() re-write in https://bugs.webkit.org/show_bug.cgi?id=278244 (though I did not bisect to confirm).
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