ref: 3d4d7c4ca9eb30d468d71c26f4b4588c800c9d1c dir: /test/swidencast.myr/
use std /* sign extending cast. should exit with status 99 */ const main = { var u : int8 var v : int32 u = 99 v = (u : int32) std.exit((v : int)) }