LayoutTests/fast/webgpu/regression/repro_275043b.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 code = `
@vertex
fn v() -> @builtin(position) vec4f {
  return vec4();
}

@fragment
fn f() -> @location(0) vec4f {
  return vec4();
}
`;
    let module = device.createShaderModule({code});
    let pipeline = device.createRenderPipeline({
      layout: device.createPipelineLayout({bindGroupLayouts: []}),
      vertex: {module, buffers: []},
      fragment: {module, targets: [{format: 'bgra8unorm'}]},
    });
    let renderBundleEncoder = device.createRenderBundleEncoder({colorFormats: ['bgra8unorm', undefined]});
    renderBundleEncoder.setPipeline(pipeline);
    renderBundleEncoder.draw(1);
    let renderBundle = renderBundleEncoder.finish();
    let error = await device.popErrorScope();
    if (error) {
      log('validation error');
      log(error.message);
    } else {
      log('no validation error');
    }
    globalThis.testRunner?.notifyDone();
  };
</script>