test/tint/buffer/uniform/types/vec3_u32.wgsl

@group(0) @binding(0) var<uniform> u : vec3<u32>;
@group(0) @binding(1) var<storage, read_write> s: vec3<u32>;

@compute @workgroup_size(1)
fn main() {
  let x = u;

  s = x;
}