Not Sure what could be the issue.

[coffeebe4code]

here is the println of vertexbufferlayout

vertex buffer layout VertexBufferLayout {
    array_stride: 8,
    step_mode: Vertex,
    attributes: [
        VertexAttribute {
            format: Float32x2,
            offset: 0,
            shader_location: 0,
        },
    ],
}

and this shader,

@vertex
fn vs_main(@location(0) position: vec2<f32>) -> @builtin(position) vec4<f32> {
    return vec4(position, 0, 1.0);
}

@fragment
fn fs_main(@builtin(position) position: vec4<f32>) -> @location(0) vec4<f32> {
    let color = 0.5 + 0.5 * cos(vec3(position.xy, 1) + vec3(1.0, 1.0, 2.0));
    return vec4(color, 1.0);
}

yielding this error.

Caused by:
  In Device::create_render_pipeline, label = 'pipeline: background'
    Error matching ShaderStages(VERTEX) shader requirements against the pipeline
      Location[1] Float32x2 interpolated as Some(Perspective) with sampling Some(Center) is not provided by the previous stage outputs
        Input is not provided by the earlier stage in the pipeline

its so strange to me what could be wrong there is no location[1]

[coffeebe4code]

I was able to figure out I was using the wrong shader. I was passing it the name of a different shader.