[INFO] cloning repository https://github.com/FrenzyExists/codingbat-rust-solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FrenzyExists/codingbat-rust-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFrenzyExists%2Fcodingbat-rust-solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFrenzyExists%2Fcodingbat-rust-solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 35ddf9bc2b5f9e9b5e29376919985bef50c34d3a
[INFO] testing FrenzyExists/codingbat-rust-solutions 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%2FFrenzyExists%2Fcodingbat-rust-solutions" "/workspace/builds/worker-29/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-29/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FrenzyExists/codingbat-rust-solutions 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/FrenzyExists/codingbat-rust-solutions
[INFO] finished tweaking git repo https://github.com/FrenzyExists/codingbat-rust-solutions
[INFO] tweaked toml for git repo https://github.com/FrenzyExists/codingbat-rust-solutions written to /workspace/builds/worker-29/source/Cargo.toml
[INFO] crate git repo https://github.com/FrenzyExists/codingbat-rust-solutions 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 065973dd128dda41b7aceb4e3d9ca30200d77d6cc4d00e524a52f7b27a501a68
[INFO] running `Command { std: "docker" "start" "-a" "065973dd128dda41b7aceb4e3d9ca30200d77d6cc4d00e524a52f7b27a501a68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "065973dd128dda41b7aceb4e3d9ca30200d77d6cc4d00e524a52f7b27a501a68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "065973dd128dda41b7aceb4e3d9ca30200d77d6cc4d00e524a52f7b27a501a68", kill_on_drop: false }`
[INFO] [stdout] 065973dd128dda41b7aceb4e3d9ca30200d77d6cc4d00e524a52f7b27a501a68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9cc9ef28852defc1985cac1e2259ea5b083a4dc21732ac148d2099640d7acff
[INFO] running `Command { std: "docker" "start" "-a" "c9cc9ef28852defc1985cac1e2259ea5b083a4dc21732ac148d2099640d7acff", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling argh_shared v0.1.6
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling argh_derive v0.1.6
[INFO] [stderr]    Compiling argh v0.1.6
[INFO] [stderr]    Compiling codingbat-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup1.rs:390:20
[INFO] [stdout]     |
[INFO] [stdout] 390 | pub fn back_around(string: &str) -> String {
[INFO] [stdout]     |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup1.rs:408:17
[INFO] [stdout]     |
[INFO] [stdout] 408 | pub fn close_10(n: i32) -> i32 {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup1.rs:425:16
[INFO] [stdout]     |
[INFO] [stdout] 425 | pub fn del_del(string: &str) -> String {
[INFO] [stdout]     |                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:472:17
[INFO] [stdout]     |
[INFO] [stdout] 472 | pub fn has_teen(a: i32, b: i32, c: i32) -> bool {return false;}
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:472:25
[INFO] [stdout]     |
[INFO] [stdout] 472 | pub fn has_teen(a: i32, b: i32, c: i32) -> bool {return false;}
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/warmup1.rs:472:33
[INFO] [stdout]     |
[INFO] [stdout] 472 | pub fn has_teen(a: i32, b: i32, c: i32) -> bool {return false;}
[INFO] [stdout]     |                                 ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:486:16
[INFO] [stdout]     |
[INFO] [stdout] 486 | pub fn icy_hot(a: i32, b: i32) -> bool {return false;}
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:486:24
[INFO] [stdout]     |
[INFO] [stdout] 486 | pub fn icy_hot(a: i32, b: i32) -> bool {return false;}
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:500:16
[INFO] [stdout]     |
[INFO] [stdout] 500 | pub fn in_1020(a: i32, b: i32) -> bool {
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:500:24
[INFO] [stdout]     |
[INFO] [stdout] 500 | pub fn in_1020(a: i32, b: i32) -> bool {
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:517:16
[INFO] [stdout]     |
[INFO] [stdout] 517 | pub fn in_3050(a: i32, b:i32) -> bool {
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:517:24
[INFO] [stdout]     |
[INFO] [stdout] 517 | pub fn in_3050(a: i32, b:i32) -> bool {
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:532:16
[INFO] [stdout]     |
[INFO] [stdout] 532 | pub fn int_max(a: i32, b: i32, c: i32) -> i32 {
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:532:24
[INFO] [stdout]     |
[INFO] [stdout] 532 | pub fn int_max(a: i32, b: i32, c: i32) -> i32 {
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/warmup1.rs:532:32
[INFO] [stdout]     |
[INFO] [stdout] 532 | pub fn int_max(a: i32, b: i32, c: i32) -> i32 {
[INFO] [stdout]     |                                ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup1.rs:550:14
[INFO] [stdout]     |
[INFO] [stdout] 550 | pub fn or_35(n: i32) -> bool {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup1.rs:597:17
[INFO] [stdout]     |
[INFO] [stdout] 597 | pub fn start_hi(string: &str) -> bool {
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup2.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub fn double_x(string: &str) -> bool {
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup2.rs:135:20
[INFO] [stdout]     |
[INFO] [stdout] 135 | pub fn front_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup2.rs:135:34
[INFO] [stdout]     |
[INFO] [stdout] 135 | pub fn front_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                                  ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup2.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 | pub fn string_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup2.rs:165:35
[INFO] [stdout]     |
[INFO] [stdout] 165 | pub fn string_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                                   ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.63s
[INFO] running `Command { std: "docker" "inspect" "c9cc9ef28852defc1985cac1e2259ea5b083a4dc21732ac148d2099640d7acff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9cc9ef28852defc1985cac1e2259ea5b083a4dc21732ac148d2099640d7acff", kill_on_drop: false }`
[INFO] [stdout] c9cc9ef28852defc1985cac1e2259ea5b083a4dc21732ac148d2099640d7acff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e571fdd4c22a0cabcd79d57721a87e82cd7465ccf0cf39f151bdee68e0d61fbc
[INFO] running `Command { std: "docker" "start" "-a" "e571fdd4c22a0cabcd79d57721a87e82cd7465ccf0cf39f151bdee68e0d61fbc", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup1.rs:390:20
[INFO] [stdout]     |
[INFO] [stdout] 390 | pub fn back_around(string: &str) -> String {
[INFO] [stdout]     |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup1.rs:408:17
[INFO] [stdout]     |
[INFO] [stdout] 408 | pub fn close_10(n: i32) -> i32 {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup1.rs:425:16
[INFO] [stdout]     |
[INFO] [stdout] 425 | pub fn del_del(string: &str) -> String {
[INFO] [stdout]     |                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:472:17
[INFO] [stdout]     |
[INFO] [stdout] 472 | pub fn has_teen(a: i32, b: i32, c: i32) -> bool {return false;}
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:472:25
[INFO] [stdout]     |
[INFO] [stdout] 472 | pub fn has_teen(a: i32, b: i32, c: i32) -> bool {return false;}
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/warmup1.rs:472:33
[INFO] [stdout]     |
[INFO] [stdout] 472 | pub fn has_teen(a: i32, b: i32, c: i32) -> bool {return false;}
[INFO] [stdout]     |                                 ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:486:16
[INFO] [stdout]     |
[INFO] [stdout] 486 | pub fn icy_hot(a: i32, b: i32) -> bool {return false;}
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:486:24
[INFO] [stdout]     |
[INFO] [stdout] 486 | pub fn icy_hot(a: i32, b: i32) -> bool {return false;}
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:500:16
[INFO] [stdout]     |
[INFO] [stdout] 500 | pub fn in_1020(a: i32, b: i32) -> bool {
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:500:24
[INFO] [stdout]     |
[INFO] [stdout] 500 | pub fn in_1020(a: i32, b: i32) -> bool {
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:517:16
[INFO] [stdout]     |
[INFO] [stdout] 517 | pub fn in_3050(a: i32, b:i32) -> bool {
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:517:24
[INFO] [stdout]     |
[INFO] [stdout] 517 | pub fn in_3050(a: i32, b:i32) -> bool {
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:532:16
[INFO] [stdout]     |
[INFO] [stdout] 532 | pub fn int_max(a: i32, b: i32, c: i32) -> i32 {
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:532:24
[INFO] [stdout]     |
[INFO] [stdout] 532 | pub fn int_max(a: i32, b: i32, c: i32) -> i32 {
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/warmup1.rs:532:32
[INFO] [stdout]     |
[INFO] [stdout] 532 | pub fn int_max(a: i32, b: i32, c: i32) -> i32 {
[INFO] [stdout]     |                                ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup1.rs:550:14
[INFO] [stdout]     |
[INFO] [stdout] 550 | pub fn or_35(n: i32) -> bool {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup1.rs:597:17
[INFO] [stdout]     |
[INFO] [stdout] 597 | pub fn start_hi(string: &str) -> bool {
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup2.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub fn double_x(string: &str) -> bool {
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup2.rs:135:20
[INFO] [stdout]     |
[INFO] [stdout] 135 | pub fn front_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling codingbat-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup2.rs:135:34
[INFO] [stdout]     |
[INFO] [stdout] 135 | pub fn front_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                                  ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup2.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 | pub fn string_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup2.rs:165:35
[INFO] [stdout]     |
[INFO] [stdout] 165 | pub fn string_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                                   ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup1.rs:390:20
[INFO] [stdout]     |
[INFO] [stdout] 390 | pub fn back_around(string: &str) -> String {
[INFO] [stdout]     |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup1.rs:408:17
[INFO] [stdout]     |
[INFO] [stdout] 408 | pub fn close_10(n: i32) -> i32 {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup1.rs:425:16
[INFO] [stdout]     |
[INFO] [stdout] 425 | pub fn del_del(string: &str) -> String {
[INFO] [stdout]     |                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:472:17
[INFO] [stdout]     |
[INFO] [stdout] 472 | pub fn has_teen(a: i32, b: i32, c: i32) -> bool {return false;}
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:472:25
[INFO] [stdout]     |
[INFO] [stdout] 472 | pub fn has_teen(a: i32, b: i32, c: i32) -> bool {return false;}
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/warmup1.rs:472:33
[INFO] [stdout]     |
[INFO] [stdout] 472 | pub fn has_teen(a: i32, b: i32, c: i32) -> bool {return false;}
[INFO] [stdout]     |                                 ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:486:16
[INFO] [stdout]     |
[INFO] [stdout] 486 | pub fn icy_hot(a: i32, b: i32) -> bool {return false;}
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:486:24
[INFO] [stdout]     |
[INFO] [stdout] 486 | pub fn icy_hot(a: i32, b: i32) -> bool {return false;}
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:500:16
[INFO] [stdout]     |
[INFO] [stdout] 500 | pub fn in_1020(a: i32, b: i32) -> bool {
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:500:24
[INFO] [stdout]     |
[INFO] [stdout] 500 | pub fn in_1020(a: i32, b: i32) -> bool {
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:517:16
[INFO] [stdout]     |
[INFO] [stdout] 517 | pub fn in_3050(a: i32, b:i32) -> bool {
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:517:24
[INFO] [stdout]     |
[INFO] [stdout] 517 | pub fn in_3050(a: i32, b:i32) -> bool {
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/warmup1.rs:532:16
[INFO] [stdout]     |
[INFO] [stdout] 532 | pub fn int_max(a: i32, b: i32, c: i32) -> i32 {
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/warmup1.rs:532:24
[INFO] [stdout]     |
[INFO] [stdout] 532 | pub fn int_max(a: i32, b: i32, c: i32) -> i32 {
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/warmup1.rs:532:32
[INFO] [stdout]     |
[INFO] [stdout] 532 | pub fn int_max(a: i32, b: i32, c: i32) -> i32 {
[INFO] [stdout]     |                                ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup1.rs:550:14
[INFO] [stdout]     |
[INFO] [stdout] 550 | pub fn or_35(n: i32) -> bool {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup1.rs:597:17
[INFO] [stdout]     |
[INFO] [stdout] 597 | pub fn start_hi(string: &str) -> bool {
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup2.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub fn double_x(string: &str) -> bool {
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup2.rs:135:20
[INFO] [stdout]     |
[INFO] [stdout] 135 | pub fn front_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup2.rs:135:34
[INFO] [stdout]     |
[INFO] [stdout] 135 | pub fn front_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                                  ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]    --> src/warmup2.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 | pub fn string_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/warmup2.rs:165:35
[INFO] [stdout]     |
[INFO] [stdout] 165 | pub fn string_times(string: &str, n: i32) -> String {
[INFO] [stdout]     |                                   ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `codingbat_rust::warmup2::*`
[INFO] [stdout]  --> tests/integration_test.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use codingbat_rust::warmup2::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: can't compare `String` with `&&str`
[INFO] [stdout]   --> tests/integration_test.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         assert_eq!(back_around(input), output);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `String == &&str`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `PartialEq<&&str>` is not implemented for `String`
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> tests/integration_test.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         assert_eq!(diff_21(*input), output);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `i32`, found `&{integer}`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: can't compare `String` with `&&str`
[INFO] [stdout]   --> tests/integration_test.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |         assert_eq!(end_up(input), output);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `String == &&str`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `PartialEq<&&str>` is not implemented for `String`
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: can't compare `String` with `&&str`
[INFO] [stdout]    --> tests/integration_test.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |         assert_eq!(front_22(input), output);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `String == &&str`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `PartialEq<&&str>` is not implemented for `String`
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: can't compare `String` with `&&str`
[INFO] [stdout]    --> tests/integration_test.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |         assert_eq!(front_3(input), output);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `String == &&str`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `PartialEq<&&str>` is not implemented for `String`
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: can't compare `String` with `&&str`
[INFO] [stdout]    --> tests/integration_test.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |         assert_eq!(front_back(input), output);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `String == &&str`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `PartialEq<&&str>` is not implemented for `String`
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> tests/integration_test.rs:162:9
[INFO] [stdout]     |
[INFO] [stdout] 162 |         assert_eq!(has_teen(input[0], input[1], input[2]), output);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found `&bool`
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> tests/integration_test.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |         assert_eq!(icy_hot(input[0], input[1]), output);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found `&bool`
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> tests/integration_test.rs:195:9
[INFO] [stdout]     |
[INFO] [stdout] 195 |         assert_eq!(in_1020(input[0], input[1]), output);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found `&bool`
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> tests/integration_test.rs:217:9
[INFO] [stdout]     |
[INFO] [stdout] 217 |         assert_eq!(in_3050(input[0], input[1]), output);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found `&bool`
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> tests/integration_test.rs:237:9
[INFO] [stdout]     |
[INFO] [stdout] 237 |         assert_eq!(int_max(input[0], input[1], input[2]), output);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `i32`, found `&{integer}`
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 11 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `codingbat-rust` due to 12 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e571fdd4c22a0cabcd79d57721a87e82cd7465ccf0cf39f151bdee68e0d61fbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e571fdd4c22a0cabcd79d57721a87e82cd7465ccf0cf39f151bdee68e0d61fbc", kill_on_drop: false }`
[INFO] [stdout] e571fdd4c22a0cabcd79d57721a87e82cd7465ccf0cf39f151bdee68e0d61fbc