1868239 - <https://webgpufundamentals.org/webgpu/lessons/webgpu-fundamentals.html> fails to render red triangle

Status: NEW

(Core :: Graphics: WebGPU, defect, P3)

Description

[Erich Gubler [:ErichDonGubler]]

Looks like current Nightly fails because of bug 1829879:

Shader validation error: 
   ┌─ our hardcoded "a" triangle:16:16
   │
16 │         return vec4f(1,0.25,0.25,1);
   │                ^^^^^^^^^^^^^^^^^^^^ naga::Expression [5]

Running the shader for this page on naga yields:

error:
   ┌─ in.wgsl:10:15
   │
10 │     return vec4f(pos[vertexIndex], 0.0, 1.0);
   │                  ^^^^^^^^^^^^^^^^ naga::Expression [12]

Entry point vs at Vertex is invalid:
        Expression [12] is invalid
        The expression [11] may only be indexed by a constant

…which looks like more work with bug 1822096.