class A {
  v: i32 = 10;
}

class B {
  v: i32 = 20;
}

function foo(a: A): void {
  __collect(); // force trigger GC
  let b = new B();
  trace("foo", 1, a.v);
}

export function _start(): void {
  call_indirect(foo.index, new A());
}