//ww:run-exit 46
// Migrated from 778_bufio_vstream_run row stream_write_flush.
package main;
import os;
import bufio;
import memio;
import io;
export fn main() i32 = {
    let raw: [16]u8;
    let mst: memio.stream = memio.fixed(raw[0:16]);
    let msrc: io.stream = &mst.vt;
    let rbuf: [8]u8;
    let wbuf: [8]u8;
    let b: bufio.stream = bufio.init(msrc, rbuf[0:8], wbuf[0:8]);
    let vs: io.stream = &b.vt;
    let payload: [5]u8;
    payload[0] = 104u8; payload[1] = 105u8;
    payload[2] = 33u8; payload[3] = 98u8; payload[4] = 121u8;
    let wr = io.write(vs, payload[0:5]);
    let nw: size = 0;
    if (wr is size) { nw = wr as size; };
    if (mst.pos != 0) { return 91; };
    let cl = io.close(vs);
    if (cl is io.error) { return 92; };
    if (mst.pos != 5) { return 93; };
    if (nw != 5: size) { return 94; };
    if (raw[0] != 104u8 || raw[4] != 121u8) { return 95; };
    return 46;
};