ref: 735a7d2932d70b5bf232e2d021e6c0c61e03f61a dir: /test/zwidencast.myr/
use std /* should zero-extend u when casting to v, returning 99 */ const main = { var u : uint8 var v : uint32 u = 99 v = (u : uint32) std.exit((v : int)) }