[INFO] cloning repository https://github.com/christophebrucker/rust_exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/christophebrucker/rust_exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristophebrucker%2Frust_exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristophebrucker%2Frust_exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cad3adeb1126a3e2cdda8d126fc393fcd79981e2
[INFO] testing christophebrucker/rust_exercises against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristophebrucker%2Frust_exercises" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/christophebrucker/rust_exercises on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/christophebrucker/rust_exercises
[INFO] finished tweaking git repo https://github.com/christophebrucker/rust_exercises
[INFO] tweaked toml for git repo https://github.com/christophebrucker/rust_exercises written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/christophebrucker/rust_exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] 049a222ad83be6350cd636874fa3527b9813fd4a35806a89791606ac37994fc2
[INFO] running `Command { std: "docker" "start" "-a" "049a222ad83be6350cd636874fa3527b9813fd4a35806a89791606ac37994fc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "049a222ad83be6350cd636874fa3527b9813fd4a35806a89791606ac37994fc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "049a222ad83be6350cd636874fa3527b9813fd4a35806a89791606ac37994fc2", kill_on_drop: false }`
[INFO] [stdout] 049a222ad83be6350cd636874fa3527b9813fd4a35806a89791606ac37994fc2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] 62807b00f62c496931f3de9fc07476843ac849f974846229a1244d5b3c6a09bc
[INFO] running `Command { std: "docker" "start" "-a" "62807b00f62c496931f3de9fc07476843ac849f974846229a1244d5b3c6a09bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/functions.rs:44:7
[INFO] [stdout]    |
[INFO] [stdout] 44 |   for x in 0..number_of_chunks {
[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: function is never used: `reverse`
[INFO] [stdout]  --> src/functions.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn reverse(string: &str) {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `max`
[INFO] [stdout]  --> src/functions.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn max(n1: i32, n2: i32) {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sort`
[INFO] [stdout]   --> src/functions.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn sort(array: [i32; 4]) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `remove`
[INFO] [stdout]   --> src/functions.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn remove(string: &str, character: &str) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sum`
[INFO] [stdout]   --> src/functions.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn sum(array: [i32; 10]) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `chunk`
[INFO] [stdout]   --> src/functions.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn chunk(vector: Vec<usize>, number: usize) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "62807b00f62c496931f3de9fc07476843ac849f974846229a1244d5b3c6a09bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62807b00f62c496931f3de9fc07476843ac849f974846229a1244d5b3c6a09bc", kill_on_drop: false }`
[INFO] [stdout] 62807b00f62c496931f3de9fc07476843ac849f974846229a1244d5b3c6a09bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] e08e30cc80ad56d399feee51d705ee2dae9f7792e8de5bf02cbb3fdaf1324c8e
[INFO] running `Command { std: "docker" "start" "-a" "e08e30cc80ad56d399feee51d705ee2dae9f7792e8de5bf02cbb3fdaf1324c8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/functions.rs:44:7
[INFO] [stdout]    |
[INFO] [stdout] 44 |   for x in 0..number_of_chunks {
[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: function is never used: `reverse`
[INFO] [stdout]  --> src/functions.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn reverse(string: &str) {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `max`
[INFO] [stdout]  --> src/functions.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn max(n1: i32, n2: i32) {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sort`
[INFO] [stdout]   --> src/functions.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn sort(array: [i32; 4]) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `remove`
[INFO] [stdout]   --> src/functions.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn remove(string: &str, character: &str) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sum`
[INFO] [stdout]   --> src/functions.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn sum(array: [i32; 10]) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `chunk`
[INFO] [stdout]   --> src/functions.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn chunk(vector: Vec<usize>, number: usize) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "e08e30cc80ad56d399feee51d705ee2dae9f7792e8de5bf02cbb3fdaf1324c8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e08e30cc80ad56d399feee51d705ee2dae9f7792e8de5bf02cbb3fdaf1324c8e", kill_on_drop: false }`
[INFO] [stdout] e08e30cc80ad56d399feee51d705ee2dae9f7792e8de5bf02cbb3fdaf1324c8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fe3f4014a28d234c1ec1473e1505cd8305d40fedeb52bf19d954d0eda4f66e03
[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" "fe3f4014a28d234c1ec1473e1505cd8305d40fedeb52bf19d954d0eda4f66e03", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/functions.rs:44:7
[INFO] [stderr]    |
[INFO] [stderr] 44 |   for x in 0..number_of_chunks {
[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: function is never used: `reverse`
[INFO] [stderr]  --> src/functions.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn reverse(string: &str) {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `max`
[INFO] [stderr]  --> src/functions.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn max(n1: i32, n2: i32) {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sort`
[INFO] [stderr]   --> src/functions.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub fn sort(array: [i32; 4]) {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `remove`
[INFO] [stderr]   --> src/functions.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn remove(string: &str, character: &str) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sum`
[INFO] [stderr]   --> src/functions.rs:26:8
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub fn sum(array: [i32; 10]) {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `chunk`
[INFO] [stderr]   --> src/functions.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 | pub fn chunk(vector: Vec<usize>, number: usize) {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_exercises` (bin "rust_exercises" test) generated 7 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_exercises-19a291539dd623b1)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fe3f4014a28d234c1ec1473e1505cd8305d40fedeb52bf19d954d0eda4f66e03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe3f4014a28d234c1ec1473e1505cd8305d40fedeb52bf19d954d0eda4f66e03", kill_on_drop: false }`
[INFO] [stdout] fe3f4014a28d234c1ec1473e1505cd8305d40fedeb52bf19d954d0eda4f66e03