//ww:run
package main;
type st = struct { a: size, b: size };
type row = st;
export fn main() i32 = { let a: row; a.a = 4; a.b = 9; let b: row; b.a = 0; b.b = 0; b = a; if (b.a != 4) { return 1; }; if (b.b != 9) { return 2; }; return 0; };