writeonce/tests/corpus/run/lang-variant-payload-escape/fixture.wo

-- haxe-parity Task 4, fix round 1 (review Critical 1): a payload
-- binding ESCAPING its arm as the switch's value is a MOVE OUT of the
-- variant object. Three shapes, all ASan-verified:
--   1. local subject (`v`): the escape arm nulls the shell's field, so
--      `v`'s own scope-end drop frees the shell only — `out` owns the
--      payload; without the null this exact shape double-freed
--      (reviewer-reproduced, plain wovm rc=139);
--   2. borrowed-param subject (`get`'s `ev`): the payload moves out
--      through the borrow and returns to the caller;
--   3. the caller's OWNED VARIANT TEMPORARY argument (`get(Boxed(..))`)
--      is reaped by the caller after the call — before this fix the
--      shell leaked ~30 B per iteration (reviewer's h5 probe: maxrss
--      10,508 KB vs a 1,532 KB control over 300k iterations).
-- `Big` is 130 Int fields: past the arena's 1024-byte ceiling, so any
-- miss is a hard ASan failure. Defaults keep the literals short.
type Ev = Tick | Boxed(b: Big)

class Big {
  f0: Int = 1
  f1: Int = 1
  f2: Int = 1
  f3: Int = 1
  f4: Int = 1
  f5: Int = 1
  f6: Int = 1
  f7: Int = 1
  f8: Int = 1
  f9: Int = 1
  f10: Int = 1
  f11: Int = 1
  f12: Int = 1
  f13: Int = 1
  f14: Int = 1
  f15: Int = 1
  f16: Int = 1
  f17: Int = 1
  f18: Int = 1
  f19: Int = 1
  f20: Int = 1
  f21: Int = 1
  f22: Int = 1
  f23: Int = 1
  f24: Int = 1
  f25: Int = 1
  f26: Int = 1
  f27: Int = 1
  f28: Int = 1
  f29: Int = 1
  f30: Int = 1
  f31: Int = 1
  f32: Int = 1
  f33: Int = 1
  f34: Int = 1
  f35: Int = 1
  f36: Int = 1
  f37: Int = 1
  f38: Int = 1
  f39: Int = 1
  f40: Int = 1
  f41: Int = 1
  f42: Int = 1
  f43: Int = 1
  f44: Int = 1
  f45: Int = 1
  f46: Int = 1
  f47: Int = 1
  f48: Int = 1
  f49: Int = 1
  f50: Int = 1
  f51: Int = 1
  f52: Int = 1
  f53: Int = 1
  f54: Int = 1
  f55: Int = 1
  f56: Int = 1
  f57: Int = 1
  f58: Int = 1
  f59: Int = 1
  f60: Int = 1
  f61: Int = 1
  f62: Int = 1
  f63: Int = 1
  f64: Int = 1
  f65: Int = 1
  f66: Int = 1
  f67: Int = 1
  f68: Int = 1
  f69: Int = 1
  f70: Int = 1
  f71: Int = 1
  f72: Int = 1
  f73: Int = 1
  f74: Int = 1
  f75: Int = 1
  f76: Int = 1
  f77: Int = 1
  f78: Int = 1
  f79: Int = 1
  f80: Int = 1
  f81: Int = 1
  f82: Int = 1
  f83: Int = 1
  f84: Int = 1
  f85: Int = 1
  f86: Int = 1
  f87: Int = 1
  f88: Int = 1
  f89: Int = 1
  f90: Int = 1
  f91: Int = 1
  f92: Int = 1
  f93: Int = 1
  f94: Int = 1
  f95: Int = 1
  f96: Int = 1
  f97: Int = 1
  f98: Int = 1
  f99: Int = 1
  f100: Int = 1
  f101: Int = 1
  f102: Int = 1
  f103: Int = 1
  f104: Int = 1
  f105: Int = 1
  f106: Int = 1
  f107: Int = 1
  f108: Int = 1
  f109: Int = 1
  f110: Int = 1
  f111: Int = 1
  f112: Int = 1
  f113: Int = 1
  f114: Int = 1
  f115: Int = 1
  f116: Int = 1
  f117: Int = 1
  f118: Int = 1
  f119: Int = 1
  f120: Int = 1
  f121: Int = 1
  f122: Int = 1
  f123: Int = 1
  f124: Int = 1
  f125: Int = 1
  f126: Int = 1
  f127: Int = 1
  f128: Int = 1
  f129: Int = 1
}

fn get(ev: Ev) -> Big {
  return switch ev {
    case Boxed(b): b;
    case Tick: Big {};
  }
}

fn main() -> Int {
  let v = Boxed(Big {})
  let out = switch v {
    case Tick: Big {};
    case Boxed(b): b;
  }
  print_int(out.f0)
  let i = 0
  let acc = 0
  while i < 50 {
    let x = get(Boxed(Big {}))
    acc = acc + x.f0
    i = i + 1
  }
  print_int(acc)
  return 0
}