import core::c;
unsafe foreign fill(target: c::Buffer, byte: i32, count: u64) -> c_ptr
    = c("libc.so.6", "memset", output(target, count));
fn start_main() -> i64 {
    var source: list<u8> = [0, 255, 65];
    let created = c::buffer(source);
    if not created::ok { print(created::error::code); return 1; }
    let owned = created::value;
    let alias = owned;
    source[0] = 7;
    let copied = c::bytes(owned, u64(3));
    if not copied::ok { return 2; }
    unsafe fill(owned, i32(32), u64(3));
    let changed = c::bytes(alias, u64(3))::value;
    if copied::value[0] not matches 0 or copied::value[1] not matches 255 or copied::value[2] not matches 65 { return 3; }
    if changed[0] not matches 32 or changed[1] not matches 32 or changed[2] not matches 32 { return 4; }
    let oversized = c::bytes(owned, u64(4));
    if oversized::ok or oversized::error::code not matches "foreign.invalid_argument" { return 5; }
    if not c::close(owned)::ok { return 6; }
    let closed = c::capacity(alias);
    if closed::ok or closed::error::code not matches "foreign.closed" { return 7; }
    if not c::close(alias)::ok { return 8; }
    return 0;
}