stack or result location semantics

gistfile1.txt

fn stack_or_result_location_semantics() custom_struct {
    var custom_structs: [1]custom_struct = undefined;
    fill_in_custom_struct(&custom_structs, 1);
    return custom_structs[0];
}

fn boom_or_safe() void {
  var custom_struct = stack_or_result_location_semantics();
}