[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 beta-2022-04-10 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 beta-2022-04-10 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [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" "+beta-2022-04-10" "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] 1118128e1040a8ad2e81b5f5ed7b655878a8da9f0f110b0e9ffa6bd8ebcae8f5 [INFO] running `Command { std: "docker" "start" "-a" "1118128e1040a8ad2e81b5f5ed7b655878a8da9f0f110b0e9ffa6bd8ebcae8f5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "1118128e1040a8ad2e81b5f5ed7b655878a8da9f0f110b0e9ffa6bd8ebcae8f5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1118128e1040a8ad2e81b5f5ed7b655878a8da9f0f110b0e9ffa6bd8ebcae8f5", kill_on_drop: false }` [INFO] [stdout] 1118128e1040a8ad2e81b5f5ed7b655878a8da9f0f110b0e9ffa6bd8ebcae8f5 [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" "+beta-2022-04-10" "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] 884a07111f12200cb41895132a5cbf86d7d056adcb3585dd72e6d0937bb61790 [INFO] running `Command { std: "docker" "start" "-a" "884a07111f12200cb41895132a5cbf86d7d056adcb3585dd72e6d0937bb61790", 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 proc-macro-error-attr v1.0.4 [INFO] [stderr] Compiling pulldown-cmark v0.0.3 [INFO] [stderr] Compiling rand v0.4.6 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling rand_os v0.1.3 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling tempdir v0.3.7 [INFO] [stderr] Compiling num-traits v0.1.43 [INFO] [stderr] Compiling skeptic v0.4.0 [INFO] [stderr] Compiling expectest v0.5.1 [INFO] [stderr] Compiling rspec v0.1.0 [INFO] [stderr] Compiling proc-macro-error v1.0.4 [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 44.12s [INFO] running `Command { std: "docker" "inspect" "884a07111f12200cb41895132a5cbf86d7d056adcb3585dd72e6d0937bb61790", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "884a07111f12200cb41895132a5cbf86d7d056adcb3585dd72e6d0937bb61790", kill_on_drop: false }` [INFO] [stdout] 884a07111f12200cb41895132a5cbf86d7d056adcb3585dd72e6d0937bb61790 [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" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] a645926b5f72f49fd2114effd26347d4ebfb1fffd11227cf697a4a41df14e833 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "a645926b5f72f49fd2114effd26347d4ebfb1fffd11227cf697a4a41df14e833", 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 1.33s [INFO] [stderr] Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/guessing_game-2444813f3ea231e7) [INFO] running `Command { std: "docker" "inspect" "a645926b5f72f49fd2114effd26347d4ebfb1fffd11227cf697a4a41df14e833", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a645926b5f72f49fd2114effd26347d4ebfb1fffd11227cf697a4a41df14e833", kill_on_drop: false }` [INFO] [stdout] a645926b5f72f49fd2114effd26347d4ebfb1fffd11227cf697a4a41df14e833 [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" "+beta-2022-04-10" "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] 131256354ed0dce6e2ec305ebdd774d77208a4ed85cc2ccfa197051472b37b1e [INFO] running `Command { std: "docker" "start" "-a" "131256354ed0dce6e2ec305ebdd774d77208a4ed85cc2ccfa197051472b37b1e", kill_on_drop: false }` [INFO] [stdout] [INFO] [stderr] warning: unused variable: `x` [INFO] [stdout] running 0 tests [INFO] [stderr] --> src/chapters/chapter03_control_flow.rs:2:9 [INFO] [stdout] [INFO] [stderr] | [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stderr] 2 | let x = 5; [INFO] [stdout] [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 0.08s [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/guessing_game-2444813f3ea231e7) [INFO] running `Command { std: "docker" "inspect" "131256354ed0dce6e2ec305ebdd774d77208a4ed85cc2ccfa197051472b37b1e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "131256354ed0dce6e2ec305ebdd774d77208a4ed85cc2ccfa197051472b37b1e", kill_on_drop: false }` [INFO] [stdout] 131256354ed0dce6e2ec305ebdd774d77208a4ed85cc2ccfa197051472b37b1e