[INFO] cloning repository https://github.com/lbt05/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lbt05/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flbt05%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flbt05%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a08295079cdc40ec489157aa8c87c5ef30765b43
[INFO] testing lbt05/rust-playground against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flbt05%2Frust-playground" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lbt05/rust-playground on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lbt05/rust-playground
[INFO] finished tweaking git repo https://github.com/lbt05/rust-playground
[INFO] tweaked toml for git repo https://github.com/lbt05/rust-playground written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/lbt05/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded zip v0.5.4
[INFO] [stderr]   Downloaded podio v0.1.6
[INFO] [stderr]   Downloaded bzip2-sys v0.1.7
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 810dea721a36c1c96c08c65c45e3f5c1f6c983733805dc3b2dd92fab24f328f9
[INFO] running `Command { std: "docker" "start" "-a" "810dea721a36c1c96c08c65c45e3f5c1f6c983733805dc3b2dd92fab24f328f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "810dea721a36c1c96c08c65c45e3f5c1f6c983733805dc3b2dd92fab24f328f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "810dea721a36c1c96c08c65c45e3f5c1f6c983733805dc3b2dd92fab24f328f9", kill_on_drop: false }`
[INFO] [stdout] 810dea721a36c1c96c08c65c45e3f5c1f6c983733805dc3b2dd92fab24f328f9
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56cd62492d9eaf4bce5eae3656342154d7c2b298505683c36189f1b54fcc6964
[INFO] running `Command { std: "docker" "start" "-a" "56cd62492d9eaf4bce5eae3656342154d7c2b298505683c36189f1b54fcc6964", kill_on_drop: false }`
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling bzip2-sys v0.1.7
[INFO] [stderr]    Compiling flate2 v1.0.13
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling zip v0.5.4
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `multi_thread_with_channel`, `simple_thread`, `thread_await_example`, `thread_with_arc_share`, `thread_with_arc`, `thread_with_channel`, `thread_with_move`
[INFO] [stdout]  --> src/main.rs:3:44
[INFO] [stdout]   |
[INFO] [stdout] 3 | ...::{multi_thread_with_channel, simple_thread, thread_await_example, thread_with_arc, thread_with_arc_share, thread_with_channel, thread_with_mov...
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/file/zip_file.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut file = File::open(file_path).unwrap();
[INFO] [stdout]   |         ----^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `simple_thread`
[INFO] [stdout]  --> src/concurrency/play_concurrency.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn simple_thread() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `thread_await_example`
[INFO] [stdout]   --> src/concurrency/play_concurrency.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn thread_await_example() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `thread_with_move`
[INFO] [stdout]   --> src/concurrency/play_concurrency.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn thread_with_move() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `thread_with_channel`
[INFO] [stdout]   --> src/concurrency/play_concurrency.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn thread_with_channel() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multi_thread_with_channel`
[INFO] [stdout]   --> src/concurrency/play_concurrency.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn multi_thread_with_channel() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `thread_with_arc`
[INFO] [stdout]   --> src/concurrency/play_concurrency.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 | pub fn thread_with_arc() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `thread_with_arc_share`
[INFO] [stdout]    --> src/concurrency/play_concurrency.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 | pub fn thread_with_arc_share() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculation_method`
[INFO] [stdout]    --> src/concurrency/play_concurrency.rs:146:4
[INFO] [stdout]     |
[INFO] [stdout] 146 | fn calculation_method(key: i32, data: Arc<RwLock<HashMap<i32, i32, RandomState>>>, thread_tx: Sender<i32>) -> () {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file/zip_file.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         file.read_to_string(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.92s
[INFO] running `Command { std: "docker" "inspect" "56cd62492d9eaf4bce5eae3656342154d7c2b298505683c36189f1b54fcc6964", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56cd62492d9eaf4bce5eae3656342154d7c2b298505683c36189f1b54fcc6964", kill_on_drop: false }`
[INFO] [stdout] 56cd62492d9eaf4bce5eae3656342154d7c2b298505683c36189f1b54fcc6964
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55cc242e8284dd6009f5276848f64f8aa9510b876071a307964a9609329ec331
[INFO] running `Command { std: "docker" "start" "-a" "55cc242e8284dd6009f5276848f64f8aa9510b876071a307964a9609329ec331", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `multi_thread_with_channel`, `simple_thread`, `thread_await_example`, `thread_with_arc_share`, `thread_with_arc`, `thread_with_channel`, `thread_with_move`
[INFO] [stdout]  --> src/main.rs:3:44
[INFO] [stdout]   |
[INFO] [stdout] 3 | ...::{multi_thread_with_channel, simple_thread, thread_await_example, thread_with_arc, thread_with_arc_share, thread_with_channel, thread_with_mov...
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/file/zip_file.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut file = File::open(file_path).unwrap();
[INFO] [stdout]   |         ----^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `simple_thread`
[INFO] [stdout]  --> src/concurrency/play_concurrency.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn simple_thread() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `thread_await_example`
[INFO] [stdout]   --> src/concurrency/play_concurrency.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn thread_await_example() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `thread_with_move`
[INFO] [stdout]   --> src/concurrency/play_concurrency.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn thread_with_move() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `thread_with_channel`
[INFO] [stdout]   --> src/concurrency/play_concurrency.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn thread_with_channel() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multi_thread_with_channel`
[INFO] [stdout]   --> src/concurrency/play_concurrency.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn multi_thread_with_channel() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `thread_with_arc`
[INFO] [stdout]   --> src/concurrency/play_concurrency.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 | pub fn thread_with_arc() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `thread_with_arc_share`
[INFO] [stdout]    --> src/concurrency/play_concurrency.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 | pub fn thread_with_arc_share() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculation_method`
[INFO] [stdout]    --> src/concurrency/play_concurrency.rs:146:4
[INFO] [stdout]     |
[INFO] [stdout] 146 | fn calculation_method(key: i32, data: Arc<RwLock<HashMap<i32, i32, RandomState>>>, thread_tx: Sender<i32>) -> () {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file/zip_file.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         file.read_to_string(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "55cc242e8284dd6009f5276848f64f8aa9510b876071a307964a9609329ec331", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55cc242e8284dd6009f5276848f64f8aa9510b876071a307964a9609329ec331", kill_on_drop: false }`
[INFO] [stdout] 55cc242e8284dd6009f5276848f64f8aa9510b876071a307964a9609329ec331
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6399dbcf1e49b0c41eba748f15655a11096e928b5b40043b64c926d29ab1a88d
[INFO] running `Command { std: "docker" "start" "-a" "6399dbcf1e49b0c41eba748f15655a11096e928b5b40043b64c926d29ab1a88d", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `multi_thread_with_channel`, `simple_thread`, `thread_await_example`, `thread_with_arc_share`, `thread_with_arc`, `thread_with_channel`, `thread_with_move`
[INFO] [stderr]  --> src/main.rs:3:44
[INFO] [stderr]   |
[INFO] [stderr] 3 | ...::{multi_thread_with_channel, simple_thread, thread_await_example, thread_with_arc, thread_with_arc_share, thread_with_channel, thread_with_mov...
[INFO] [stderr]   |       ^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/file/zip_file.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut file = File::open(file_path).unwrap();
[INFO] [stderr]   |         ----^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `simple_thread`
[INFO] [stderr]  --> src/concurrency/play_concurrency.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn simple_thread() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `thread_await_example`
[INFO] [stderr]   --> src/concurrency/play_concurrency.rs:22:8
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub fn thread_await_example() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `thread_with_move`
[INFO] [stderr]   --> src/concurrency/play_concurrency.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn thread_with_move() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `thread_with_channel`
[INFO] [stderr]   --> src/concurrency/play_concurrency.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 47 | pub fn thread_with_channel() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `multi_thread_with_channel`
[INFO] [stderr]   --> src/concurrency/play_concurrency.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | pub fn multi_thread_with_channel() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `thread_with_arc`
[INFO] [stderr]   --> src/concurrency/play_concurrency.rs:99:8
[INFO] [stderr]    |
[INFO] [stderr] 99 | pub fn thread_with_arc() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `thread_with_arc_share`
[INFO] [stderr]    --> src/concurrency/play_concurrency.rs:120:8
[INFO] [stderr]     |
[INFO] [stderr] 120 | pub fn thread_with_arc_share() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calculation_method`
[INFO] [stderr]    --> src/concurrency/play_concurrency.rs:146:4
[INFO] [stderr]     |
[INFO] [stderr] 146 | fn calculation_method(key: i32, data: Arc<RwLock<HashMap<i32, i32, RandomState>>>, thread_tx: Sender<i32>) -> () {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/file/zip_file.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         file.read_to_string(&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: `rust-playground` (bin "rust-playground" test) generated 11 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_playground-71341cf6c521eeb6)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6399dbcf1e49b0c41eba748f15655a11096e928b5b40043b64c926d29ab1a88d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6399dbcf1e49b0c41eba748f15655a11096e928b5b40043b64c926d29ab1a88d", kill_on_drop: false }`
[INFO] [stdout] 6399dbcf1e49b0c41eba748f15655a11096e928b5b40043b64c926d29ab1a88d