LayoutTests/fast/webgpu/regression/repro_274703.html

<script>
  globalThis.testRunner?.waitUntilDone();
  const log = console.debug;

  onload = async () => {
    let adapter = await navigator.gpu.requestAdapter({});
    let device = await adapter.requestDevice({});
    device.pushErrorScope('validation');
    let earlierBuffer = device.createBuffer({size: 256, usage: GPUBufferUsage.UNIFORM, mappedAtCreation: true});
    let earlierU32 = new Uint32Array(earlierBuffer.getMappedRange());
    earlierU32.fill(123456789);
    earlierBuffer.unmap();
    let vertexBuffer = device.createBuffer({size: 0, usage: GPUBufferUsage.VERTEX});
    let code = `
struct VertexOutput {
  @builtin(position) position : vec4f,
  @location(0) @interpolate(flat) something: u32,
}

@vertex
fn v(@location(0) fromVertexBuffer: u32) -> VertexOutput {
  var v = VertexOutput();
  v.something = fromVertexBuffer;
  return v;
}

@fragment
fn f(@location(0) @interpolate(flat) something: u32) -> @location(0) u32 {
  return something;
}
`;
    let module = device.createShaderModule({code});
    let pipeline = device.createRenderPipeline({
      layout: device.createPipelineLayout({bindGroupLayouts: []}),
      vertex: {
        module,
        buffers: [{
          arrayStride: earlierBuffer.size,
          stepMode: 'instance',
          attributes: [{format: 'uint32', offset: 0, shaderLocation: 0}],
        }],
      },
      fragment: {module, targets: [{format: 'r32uint'}]},
      primitive: {topology: 'point-list'},
    });

    let texture = device.createTexture({format: 'r32uint', size: [1, 1, 1], usage: GPUTextureUsage.RENDER_ATTACHMENT | GPUTextureUsage.COPY_SRC});
    let renderPassDescriptor = {
      colorAttachments: [{
        view: texture.createView(),
        clearValue: [0, 0, 0, 0],
        loadOp: 'clear', storeOp: 'store',
      }],
    };
    let commandEncoder = device.createCommandEncoder();
    let renderPassEncoder = commandEncoder.beginRenderPass(renderPassDescriptor);
    renderPassEncoder.setPipeline(pipeline);
    renderPassEncoder.setVertexBuffer(0, vertexBuffer);
    let indexBuffer = device.createBuffer({usage: GPUBufferUsage.INDEX, size: 4});
    renderPassEncoder.setIndexBuffer(indexBuffer, 'uint32');
    renderPassEncoder.drawIndexed(1, 1, 0, 0, 2 ** 32 - 1);
    renderPassEncoder.end();
    let outputBuffer = device.createBuffer({size: 4, usage: GPUBufferUsage.COPY_DST | GPUBufferUsage.MAP_READ});
    commandEncoder.copyTextureToBuffer({texture}, {buffer: outputBuffer}, {width: 1, height: 1, depthOrArrayLayers: 1});
    device.queue.submit([commandEncoder.finish()]);
    await device.queue.onSubmittedWorkDone();
    await outputBuffer.mapAsync(GPUMapMode.READ);
    let outputU32 = new Uint32Array(outputBuffer.getMappedRange());
    log(outputU32);
    outputBuffer.unmap();
    let error = await device.popErrorScope();
    if (error) {
      log('validation error');
      log(error.message);
    } else {
      log('no validation error');
    }
    globalThis.testRunner?.notifyDone();
  };
</script>