ref: 7096d0e99d9deb053a7763f49b2b1b7b1df20a6a 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") }