[Webkit-unassigned] [Bug 220532] New: [selectors] :host(:not(.a .b)) should be an invalid selector

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220532

            Bug ID: 220532
           Summary: [selectors] :host(:not(.a .b)) should be an invalid
                    selector
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: BrowserCompat, WebExposed
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rego at igalia.com

There's only one test case failing in the following WPT test:
https://wpt.fyi/results/css/selectors/parsing/parse-not.html

That test case is checking that ":host(:not(.a .b))" is an invalid selector.
It's passing in Chromium and Firefox, but failing in WebKit.

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