[Webkit-unassigned] [Bug 265720] New: [Wasm-GC] Fix casts on larger type indices

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=265720

            Bug ID: 265720
           Summary: [Wasm-GC] Fix casts on larger type indices
           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

There are some failures when casting GC types that have type indices greater than a byte, because there are some sketchy type casts in the cast validation code. It's reproducible using a test that just has more 256 or so typedefs and casts to those types.

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