[INFO] updating cached repository https://github.com/strexicious/believmr
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 72c33c3ddfd0364db1d600549c3074a6bd1732f8
[INFO] testing strexicious/believmr against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstrexicious%2Fbelievmr" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/strexicious/believmr on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/strexicious/believmr
[INFO] finished tweaking git repo https://github.com/strexicious/believmr
[INFO] tweaked toml for git repo https://github.com/strexicious/believmr written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/strexicious/believmr already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stdout] 2f80f8ca081341d75eaa891e92d9d3a20ec75438470da8218e71e1695dd668d5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "2f80f8ca081341d75eaa891e92d9d3a20ec75438470da8218e71e1695dd668d5"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling bincode v1.1.4
[INFO] [stderr]    Compiling believmr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `TcpListener`
[INFO] [stderr]  --> src/cluster/worker.rs:2:16
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::net::{TcpListener, TcpStream, ToSocketAddrs};
[INFO] [stderr]   |                ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/cluster/worker.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ErrorKind`, `Error`
[INFO] [stderr]  --> src/cluster/master.rs:1:23
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Result, Error, ErrorKind, Read, Write};
[INFO] [stderr]   |                       ^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/cluster/master.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_mem`
[INFO] [stderr]   --> src/engine.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn print_mem(&self, pos: u16, offset: u16) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_program`
[INFO] [stderr]   --> src/engine.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     pub fn print_program(&self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Worker`
[INFO] [stderr]  --> src/cluster/worker.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Worker {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register`
[INFO] [stderr]   --> src/cluster/worker.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn register<A: ToSocketAddrs>(id: usize, to: A) -> Result<Self> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Master`
[INFO] [stderr]  --> src/cluster/master.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub struct Master {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `listen_on`
[INFO] [stderr]   --> src/cluster/master.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn listen_on<A: ToSocketAddrs>(addr: A) -> Result<Self> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `accept_workers`
[INFO] [stderr]   --> src/cluster/master.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn accept_workers(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `MESSAGE_SIZE`
[INFO] [stderr]  --> src/cluster/message.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub const MESSAGE_SIZE: usize = mem::size_of::<Message>();
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `serialized`
[INFO] [stderr]   --> src/cluster/message.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn serialized(&self) -> [u8; MESSAGE_SIZE] {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/worker.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |         host.read_exact(&mut buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/worker.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |                 host.flush();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/master.rs:23:21
[INFO] [stderr]    |
[INFO] [stderr] 23 |                     worker.flush();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/master.rs:26:21
[INFO] [stderr]    |
[INFO] [stderr] 26 |                     worker.read_exact(&mut buffer);
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.26s
[INFO] running `"docker" "inspect" "2f80f8ca081341d75eaa891e92d9d3a20ec75438470da8218e71e1695dd668d5"`
[INFO] running `"docker" "rm" "-f" "2f80f8ca081341d75eaa891e92d9d3a20ec75438470da8218e71e1695dd668d5"`
[INFO] [stdout] 2f80f8ca081341d75eaa891e92d9d3a20ec75438470da8218e71e1695dd668d5
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 66966123f4844dfed031aeae162ea95ceec55ec800f06e4eaa78877a329b00f3
[INFO] running `"docker" "start" "-a" "66966123f4844dfed031aeae162ea95ceec55ec800f06e4eaa78877a329b00f3"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling believmr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `TcpListener`
[INFO] [stderr]  --> src/cluster/worker.rs:2:16
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::net::{TcpListener, TcpStream, ToSocketAddrs};
[INFO] [stderr]   |                ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/cluster/worker.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ErrorKind`, `Error`
[INFO] [stderr]  --> src/cluster/master.rs:1:23
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Result, Error, ErrorKind, Read, Write};
[INFO] [stderr]   |                       ^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/cluster/master.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_mem`
[INFO] [stderr]   --> src/engine.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn print_mem(&self, pos: u16, offset: u16) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_program`
[INFO] [stderr]   --> src/engine.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     pub fn print_program(&self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Worker`
[INFO] [stderr]  --> src/cluster/worker.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Worker {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register`
[INFO] [stderr]   --> src/cluster/worker.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn register<A: ToSocketAddrs>(id: usize, to: A) -> Result<Self> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Master`
[INFO] [stderr]  --> src/cluster/master.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub struct Master {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `listen_on`
[INFO] [stderr]   --> src/cluster/master.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn listen_on<A: ToSocketAddrs>(addr: A) -> Result<Self> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `accept_workers`
[INFO] [stderr]   --> src/cluster/master.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn accept_workers(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `MESSAGE_SIZE`
[INFO] [stderr]  --> src/cluster/message.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub const MESSAGE_SIZE: usize = mem::size_of::<Message>();
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `serialized`
[INFO] [stderr]   --> src/cluster/message.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn serialized(&self) -> [u8; MESSAGE_SIZE] {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/worker.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |         host.read_exact(&mut buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/worker.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |                 host.flush();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/master.rs:23:21
[INFO] [stderr]    |
[INFO] [stderr] 23 |                     worker.flush();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/master.rs:26:21
[INFO] [stderr]    |
[INFO] [stderr] 26 |                     worker.read_exact(&mut buffer);
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.54s
[INFO] running `"docker" "inspect" "66966123f4844dfed031aeae162ea95ceec55ec800f06e4eaa78877a329b00f3"`
[INFO] running `"docker" "rm" "-f" "66966123f4844dfed031aeae162ea95ceec55ec800f06e4eaa78877a329b00f3"`
[INFO] [stdout] 66966123f4844dfed031aeae162ea95ceec55ec800f06e4eaa78877a329b00f3
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b1dd6861bc43345d6057e53a5213671128492aaa693d347ce4235826ab16b808
[INFO] running `"docker" "start" "-a" "b1dd6861bc43345d6057e53a5213671128492aaa693d347ce4235826ab16b808"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused import: `TcpListener`
[INFO] [stderr]  --> src/cluster/worker.rs:2:16
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::net::{TcpListener, TcpStream, ToSocketAddrs};
[INFO] [stderr]   |                ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/cluster/worker.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ErrorKind`, `Error`
[INFO] [stderr]  --> src/cluster/master.rs:1:23
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Result, Error, ErrorKind, Read, Write};
[INFO] [stderr]   |                       ^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/cluster/master.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_mem`
[INFO] [stderr]   --> src/engine.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn print_mem(&self, pos: u16, offset: u16) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_program`
[INFO] [stderr]   --> src/engine.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     pub fn print_program(&self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Worker`
[INFO] [stderr]  --> src/cluster/worker.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Worker {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register`
[INFO] [stderr]   --> src/cluster/worker.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn register<A: ToSocketAddrs>(id: usize, to: A) -> Result<Self> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Master`
[INFO] [stderr]  --> src/cluster/master.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub struct Master {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `listen_on`
[INFO] [stderr]   --> src/cluster/master.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn listen_on<A: ToSocketAddrs>(addr: A) -> Result<Self> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `accept_workers`
[INFO] [stderr]   --> src/cluster/master.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn accept_workers(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `MESSAGE_SIZE`
[INFO] [stderr]  --> src/cluster/message.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub const MESSAGE_SIZE: usize = mem::size_of::<Message>();
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `serialized`
[INFO] [stderr]   --> src/cluster/message.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn serialized(&self) -> [u8; MESSAGE_SIZE] {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/worker.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |         host.read_exact(&mut buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/worker.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |                 host.flush();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/master.rs:23:21
[INFO] [stderr]    |
[INFO] [stderr] 23 |                     worker.flush();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/cluster/master.rs:26:21
[INFO] [stderr]    |
[INFO] [stderr] 26 |                     worker.read_exact(&mut buffer);
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/believmr-72be9adac8f2986c
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "b1dd6861bc43345d6057e53a5213671128492aaa693d347ce4235826ab16b808"`
[INFO] running `"docker" "rm" "-f" "b1dd6861bc43345d6057e53a5213671128492aaa693d347ce4235826ab16b808"`
[INFO] [stdout] b1dd6861bc43345d6057e53a5213671128492aaa693d347ce4235826ab16b808