[INFO] cloning repository https://github.com/igorgcardoso/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/igorgcardoso/rust-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Figorgcardoso%2Frust-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Figorgcardoso%2Frust-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d7fa2dde0916af285e4c0ceb47e9765fa9fa2e6e
[INFO] checking igorgcardoso/rust-exercises against try#121a90d34197f711021eeb158e7f4184b8be8ceb for pr-140313
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Figorgcardoso%2Frust-exercises" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/igorgcardoso/rust-exercises on toolchain 121a90d34197f711021eeb158e7f4184b8be8ceb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+121a90d34197f711021eeb158e7f4184b8be8ceb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/igorgcardoso/rust-exercises
[INFO] finished tweaking git repo https://github.com/igorgcardoso/rust-exercises
[INFO] tweaked toml for git repo https://github.com/igorgcardoso/rust-exercises written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/igorgcardoso/rust-exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+121a90d34197f711021eeb158e7f4184b8be8ceb" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+121a90d34197f711021eeb158e7f4184b8be8ceb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 74e66ef872b40678a915c724d2c1ba7029fbb72cf88cdb19323905ad103b56a4
[INFO] running `Command { std: "docker" "start" "-a" "74e66ef872b40678a915c724d2c1ba7029fbb72cf88cdb19323905ad103b56a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74e66ef872b40678a915c724d2c1ba7029fbb72cf88cdb19323905ad103b56a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74e66ef872b40678a915c724d2c1ba7029fbb72cf88cdb19323905ad103b56a4", kill_on_drop: false }`
[INFO] [stdout] 74e66ef872b40678a915c724d2c1ba7029fbb72cf88cdb19323905ad103b56a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+121a90d34197f711021eeb158e7f4184b8be8ceb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e060883f417fc42cd4c5e63dae0e607763db41d6e2faf4982c124357d3dff64
[INFO] running `Command { std: "docker" "start" "-a" "5e060883f417fc42cd4c5e63dae0e607763db41d6e2faf4982c124357d3dff64", kill_on_drop: false }`
[INFO] [stderr]     Checking exercise-8 v0.1.0 (/opt/rustwide/workdir/exercises/exercise-8)
[INFO] [stderr]     Checking exercise-5 v0.1.0 (/opt/rustwide/workdir/exercises/exercise-5)
[INFO] [stderr]     Checking exercise-1 v0.1.0 (/opt/rustwide/workdir/exercises/exercise-1)
[INFO] [stderr]     Checking exercise-6 v0.1.0 (/opt/rustwide/workdir/exercises/exercise-6)
[INFO] [stderr]     Checking exercise-7 v0.1.0 (/opt/rustwide/workdir/exercises/exercise-7)
[INFO] [stderr]     Checking exercise-0 v0.1.0 (/opt/rustwide/workdir/exercises/exercise-0)
[INFO] [stderr]     Checking exercise-9 v0.1.0 (/opt/rustwide/workdir/exercises/exercise-9)
[INFO] [stdout] warning: function `is_even` is never used
[INFO] [stdout]  --> exercises/exercise-5/src/lib.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn is_even(n: u32) -> bool {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `speed` is never used
[INFO] [stdout]  --> exercises/exercise-6/src/lib.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn speed(start: u32, end: u32, time_elapsed: u32) -> u32 {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking exercise-10 v0.1.0 (/opt/rustwide/workdir/exercises/exercise-10)
[INFO] [stdout] warning: function `greeting` is never used
[INFO] [stdout]   --> exercises/exercise-0/src/lib.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn greeting() -> &'static str {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking exercise-4 v0.1.0 (/opt/rustwide/workdir/exercises/exercise-4)
[INFO] [stderr]     Checking exercise-3 v0.1.0 (/opt/rustwide/workdir/exercises/exercise-3)
[INFO] [stdout] warning: function `factorial` is never used
[INFO] [stdout]   --> exercises/exercise-7/src/lib.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn factorial(n: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compute` is never used
[INFO] [stdout]  --> exercises/exercise-1/src/lib.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn compute(a: u32, b: u32) -> u32 {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking exercise-2 v0.1.0 (/opt/rustwide/workdir/exercises/exercise-2)
[INFO] [stdout] warning: function `intro` is never used
[INFO] [stdout]  --> exercises/exercise-2/src/lib.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn intro() -> &'static str {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compute` is never used
[INFO] [stdout]  --> exercises/exercise-3/src/lib.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn compute(a: u32, b: u32) -> u32 {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "5e060883f417fc42cd4c5e63dae0e607763db41d6e2faf4982c124357d3dff64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e060883f417fc42cd4c5e63dae0e607763db41d6e2faf4982c124357d3dff64", kill_on_drop: false }`
[INFO] [stdout] 5e060883f417fc42cd4c5e63dae0e607763db41d6e2faf4982c124357d3dff64