[INFO] cloning repository https://github.com/Aypahyo/RustyGuessingGame
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Aypahyo/RustyGuessingGame" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAypahyo%2FRustyGuessingGame", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAypahyo%2FRustyGuessingGame'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 40f6fd6131cc0717149576f027eb002c649f4f1d
[INFO] testing Aypahyo/RustyGuessingGame against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAypahyo%2FRustyGuessingGame" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Aypahyo/RustyGuessingGame on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Aypahyo/RustyGuessingGame
[INFO] finished tweaking git repo https://github.com/Aypahyo/RustyGuessingGame
[INFO] tweaked toml for git repo https://github.com/Aypahyo/RustyGuessingGame written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Aypahyo/RustyGuessingGame already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pulldown-cmark v0.0.3
[INFO] [stderr]   Downloaded skeptic v0.4.0
[INFO] [stderr]   Downloaded expectest v0.5.1
[INFO] [stderr]   Downloaded rspec v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 50dd54969c3fc1417499c7159ec5c16ad83bfdf0fc4aa332fa54f27b0e4dfee0
[INFO] running `Command { std: "docker" "start" "-a" "50dd54969c3fc1417499c7159ec5c16ad83bfdf0fc4aa332fa54f27b0e4dfee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50dd54969c3fc1417499c7159ec5c16ad83bfdf0fc4aa332fa54f27b0e4dfee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50dd54969c3fc1417499c7159ec5c16ad83bfdf0fc4aa332fa54f27b0e4dfee0", kill_on_drop: false }`
[INFO] [stdout] 50dd54969c3fc1417499c7159ec5c16ad83bfdf0fc4aa332fa54f27b0e4dfee0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 192f592b9419c002f018454267dbd6365ab92cfc0a1a65b7c8abc9333541de3e
[INFO] running `Command { std: "docker" "start" "-a" "192f592b9419c002f018454267dbd6365ab92cfc0a1a65b7c8abc9333541de3e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling pulldown-cmark v0.0.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling skeptic v0.4.0
[INFO] [stderr]    Compiling expectest v0.5.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling rspec v0.1.0
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]    Compiling clap v3.0.0-beta.2
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/chapters/chapter03_control_flow.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let x = 5;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |         let s = String::from("hello"); // s is valid from this point forward
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let y = x;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let s2 = s1.clone();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let s1 = gives_ownership();                // gives_ownership moves its return
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let s3 = takes_and_gives_back(s2);  // s2 is moved into
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let r1 = &mut s;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let r2 = &mut s;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let r1 = &mut s;
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let r2 = &mut s;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let r1 = &s; // no problem
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let r2 = &s; // no problem
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r3`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let r3 = &mut s; // BIG PROBLEM
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/chapters/chapter00_arg_matches.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MAX_POINTS`
[INFO] [stdout]  --> src/chapters/chapter03_data_types.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub const MAX_POINTS: u32 = 100_000;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/chapters/chapter03_data_types.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fun`
[INFO] [stdout]  --> src/chapters/chapter02_guessing_game.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | fun() {
[INFO] [stdout]   | ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/chapters/chapter03_control_flow.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/chapters/chapter03_functions.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `another_function`
[INFO] [stdout]  --> src/chapters/chapter03_functions.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn another_function(x: i32) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `five`
[INFO] [stdout]   --> src/chapters/chapter03_functions.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn five() -> i32 {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_one`
[INFO] [stdout]   --> src/chapters/chapter03_functions.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn add_one(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `do_twice`
[INFO] [stdout]   --> src/chapters/chapter03_functions.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn do_twice(f: fn(i32) -> i32, arg: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/chapters/chapter04_ownership.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn takes_ownership(some_string: String) {    // some_string comes into scope
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `makes_copy`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn makes_copy(some_integer: i32) {           // some_integer comes into scope
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run2`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub fn run2() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gives_ownership`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn gives_ownership() -> String {             // gives_ownership will move its
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_and_gives_back`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn takes_and_gives_back(a_string: String) -> String { // a_string comes into
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 46.23s
[INFO] running `Command { std: "docker" "inspect" "192f592b9419c002f018454267dbd6365ab92cfc0a1a65b7c8abc9333541de3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "192f592b9419c002f018454267dbd6365ab92cfc0a1a65b7c8abc9333541de3e", kill_on_drop: false }`
[INFO] [stdout] 192f592b9419c002f018454267dbd6365ab92cfc0a1a65b7c8abc9333541de3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f3f2c2f7f40856b74948123a2da7a4af025038ccbeca59c25363806bffca7290
[INFO] running `Command { std: "docker" "start" "-a" "f3f2c2f7f40856b74948123a2da7a4af025038ccbeca59c25363806bffca7290", kill_on_drop: false }`
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/chapters/chapter03_control_flow.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let x = 5;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |         let s = String::from("hello"); // s is valid from this point forward
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let y = x;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let s2 = s1.clone();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let s1 = gives_ownership();                // gives_ownership moves its return
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let s3 = takes_and_gives_back(s2);  // s2 is moved into
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let r1 = &mut s;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let r2 = &mut s;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let r1 = &mut s;
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let r2 = &mut s;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let r1 = &s; // no problem
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let r2 = &s; // no problem
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r3`
[INFO] [stdout]   --> src/chapters/chapter04_references_and_borrowing.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let r3 = &mut s; // BIG PROBLEM
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/chapters/chapter00_arg_matches.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MAX_POINTS`
[INFO] [stdout]  --> src/chapters/chapter03_data_types.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub const MAX_POINTS: u32 = 100_000;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/chapters/chapter03_data_types.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fun`
[INFO] [stdout]  --> src/chapters/chapter02_guessing_game.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | fun() {
[INFO] [stdout]   | ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/chapters/chapter03_control_flow.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/chapters/chapter03_functions.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `another_function`
[INFO] [stdout]  --> src/chapters/chapter03_functions.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn another_function(x: i32) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `five`
[INFO] [stdout]   --> src/chapters/chapter03_functions.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn five() -> i32 {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_one`
[INFO] [stdout]   --> src/chapters/chapter03_functions.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn add_one(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `do_twice`
[INFO] [stdout]   --> src/chapters/chapter03_functions.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn do_twice(f: fn(i32) -> i32, arg: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/chapters/chapter04_ownership.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn takes_ownership(some_string: String) {    // some_string comes into scope
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `makes_copy`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn makes_copy(some_integer: i32) {           // some_integer comes into scope
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run2`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub fn run2() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gives_ownership`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn gives_ownership() -> String {             // gives_ownership will move its
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_and_gives_back`
[INFO] [stdout]   --> src/chapters/chapter04_ownership.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn takes_and_gives_back(a_string: String) -> String { // a_string comes into
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "f3f2c2f7f40856b74948123a2da7a4af025038ccbeca59c25363806bffca7290", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3f2c2f7f40856b74948123a2da7a4af025038ccbeca59c25363806bffca7290", kill_on_drop: false }`
[INFO] [stdout] f3f2c2f7f40856b74948123a2da7a4af025038ccbeca59c25363806bffca7290
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ccc2896223b274eba97e685a0d936d307892fce16a32c1dfc787d2da7a6f072b
[INFO] running `Command { std: "docker" "start" "-a" "ccc2896223b274eba97e685a0d936d307892fce16a32c1dfc787d2da7a6f072b", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]  --> src/chapters/chapter03_control_flow.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let x = 5;
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/chapters/chapter04_ownership.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let s = String::from("hello"); // s is valid from this point forward
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/chapters/chapter04_ownership.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let y = x;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s2`
[INFO] [stderr]   --> src/chapters/chapter04_ownership.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let s2 = s1.clone();
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s1`
[INFO] [stderr]   --> src/chapters/chapter04_ownership.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let s1 = gives_ownership();                // gives_ownership moves its return
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s3`
[INFO] [stderr]   --> src/chapters/chapter04_ownership.rs:57:9
[INFO] [stderr]    |
[INFO] [stderr] 57 |     let s3 = takes_and_gives_back(s2);  // s2 is moved into
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r1`
[INFO] [stderr]   --> src/chapters/chapter04_references_and_borrowing.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let r1 = &mut s;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r2`
[INFO] [stderr]   --> src/chapters/chapter04_references_and_borrowing.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let r2 = &mut s;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r1`
[INFO] [stderr]   --> src/chapters/chapter04_references_and_borrowing.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let r1 = &mut s;
[INFO] [stderr]    |             ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r2`
[INFO] [stderr]   --> src/chapters/chapter04_references_and_borrowing.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let r2 = &mut s;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r1`
[INFO] [stderr]   --> src/chapters/chapter04_references_and_borrowing.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let r1 = &s; // no problem
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r2`
[INFO] [stderr]   --> src/chapters/chapter04_references_and_borrowing.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let r2 = &s; // no problem
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r3`
[INFO] [stderr]   --> src/chapters/chapter04_references_and_borrowing.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let r3 = &mut s; // BIG PROBLEM
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r3`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]  --> src/chapters/chapter00_arg_matches.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn run() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `MAX_POINTS`
[INFO] [stderr]  --> src/chapters/chapter03_data_types.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub const MAX_POINTS: u32 = 100_000;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]  --> src/chapters/chapter03_data_types.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn run() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fun`
[INFO] [stderr]  --> src/chapters/chapter02_guessing_game.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | fun() {
[INFO] [stderr]   | ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]  --> src/chapters/chapter03_control_flow.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn run() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]  --> src/chapters/chapter03_functions.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn run() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `another_function`
[INFO] [stderr]  --> src/chapters/chapter03_functions.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn another_function(x: i32) {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `five`
[INFO] [stderr]   --> src/chapters/chapter03_functions.rs:13:4
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn five() -> i32 {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `add_one`
[INFO] [stderr]   --> src/chapters/chapter03_functions.rs:17:4
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn add_one(x: i32) -> i32 {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `do_twice`
[INFO] [stderr]   --> src/chapters/chapter03_functions.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn do_twice(f: fn(i32) -> i32, arg: i32) -> i32 {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]  --> src/chapters/chapter04_ownership.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn run() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `takes_ownership`
[INFO] [stderr]   --> src/chapters/chapter04_ownership.rs:44:4
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn takes_ownership(some_string: String) {    // some_string comes into scope
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `makes_copy`
[INFO] [stderr]   --> src/chapters/chapter04_ownership.rs:49:4
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn makes_copy(some_integer: i32) {           // some_integer comes into scope
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run2`
[INFO] [stderr]   --> src/chapters/chapter04_ownership.rs:53:8
[INFO] [stderr]    |
[INFO] [stderr] 53 | pub fn run2() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gives_ownership`
[INFO] [stderr]   --> src/chapters/chapter04_ownership.rs:63:4
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn gives_ownership() -> String {             // gives_ownership will move its
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `takes_and_gives_back`
[INFO] [stderr]   --> src/chapters/chapter04_ownership.rs:74:4
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn takes_and_gives_back(a_string: String) -> String { // a_string comes into
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `guessing_game` (bin "guessing_game" test) generated 29 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/guessing_game-79a54c3c4e102c23)
[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" "ccc2896223b274eba97e685a0d936d307892fce16a32c1dfc787d2da7a6f072b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccc2896223b274eba97e685a0d936d307892fce16a32c1dfc787d2da7a6f072b", kill_on_drop: false }`
[INFO] [stdout] ccc2896223b274eba97e685a0d936d307892fce16a32c1dfc787d2da7a6f072b