[Webkit-unassigned] [Bug 254695] New: [Wasm-GC] Add nullexternref and nullfuncref types

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=254695

            Bug ID: 254695
           Summary: [Wasm-GC] Add nullexternref and nullfuncref types
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebAssembly
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: asumu at igalia.com

Because the Wasm GC proposal has three separate reference hierarchies (extern, any, func) since https://github.com/WebAssembly/gc/issues/307 was resolved, and they each need a distinct bottom type.

JSC currently implements nullref which is the bottom type for the any hierarchy. The other two bottom types need to be added as well.

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