[Webkit-unassigned] [Bug 198775] New: [WHLSL] Code that accesses an undefined variable crashes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=198775

            Bug ID: 198775
           Summary: [WHLSL] Code that accesses an undefined variable
                    crashes
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGPU
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sbarati at apple.com
                CC: dino at apple.com, fpizlo at apple.com, jonlee at apple.com,
                    justin_fan at apple.com, mmaxfield at apple.com,
                    rmorisset at apple.com

e.g:
```
vertex float4 vertexShader(float4 position : attribute(0), float i : attribute(1)) : SV_Position {
    return position;
}

fragment float4 fragmentShader(float4 position : SV_Position, constant float[] theBuffer : register(b0)) : SV_Target 0 {
    //float x;
    return float4(x, x, x, 1.0);
}

```

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