test/buffer/storage/types/runtime_array.wgsl

struct S {
  f : f32;
};

@group(0) @binding(0)
var<storage, read> in : array<S>;

@group(0) @binding(1)
var<storage, read_write> out : array<S>;

@stage(compute) @workgroup_size(1)
fn main() {
  out[0] = in[0];
}