test/access/let/matrix.wgsl

[[stage(compute), workgroup_size(1)]]
fn main() {
  let m : mat3x3<f32> = mat3x3<f32>(vec3<f32>(1., 2., 3.), vec3<f32>(4., 5., 6.), vec3<f32>(7., 8., 9.));
  let v : vec3<f32> = m[1];
  let f : f32 = v[1];
}