ref: a72122d49d80fae5d7ffce3a7eeb47b320b9f2c6 dir: /test/fncast.myr/
use std const main = { var fn, envfn var ptr fn = { } envfn = { ptr = ptr } ptr = fn castto(byte#) ptr = envfn castto(byte#) std.put("ok\n") }