//ww:run-exit 11
// Migrated from 775_io_vtable_run row reader_void_unsupported.
package main;
import io;
export fn main() i32 = {
    let vt: io.vtable;
    let v: io.stream = &vt;
    let buf: [4]u8;
    let bs: []u8 = buf[0:4];
    let _r = io.read(v, bs);
    return 11;
};