[INFO] fetching crate rs_algo 0.2.1...
[INFO] checking rs_algo-0.2.1 against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] extracting crate rs_algo 0.2.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate rs_algo 0.2.1 on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rs_algo 0.2.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate rs_algo 0.2.1
[INFO] tweaked toml for crates.io crate rs_algo 0.2.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate rs_algo 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f357da30eb1ef1fb47d2a8e4c9c3375ce71c83a131c9288356e4d6a9464a5ed5
[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" "f357da30eb1ef1fb47d2a8e4c9c3375ce71c83a131c9288356e4d6a9464a5ed5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f357da30eb1ef1fb47d2a8e4c9c3375ce71c83a131c9288356e4d6a9464a5ed5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f357da30eb1ef1fb47d2a8e4c9c3375ce71c83a131c9288356e4d6a9464a5ed5", kill_on_drop: false }`
[INFO] [stdout] f357da30eb1ef1fb47d2a8e4c9c3375ce71c83a131c9288356e4d6a9464a5ed5
[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=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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e73c6d136b9eb72ee2470a4acb160dcb09396bdd8b3b01fdba24d052f617870f
[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" "e73c6d136b9eb72ee2470a4acb160dcb09396bdd8b3b01fdba24d052f617870f", kill_on_drop: false }`
[INFO] [stderr]     Checking rs_algo v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `sorted_bubble`
[INFO] [stdout]   --> examples/algo.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let sorted_bubble = bubble::sort(&a);
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sorted_bubble`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sorted_insertion`
[INFO] [stdout]   --> examples/algo.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let sorted_insertion = insertion::sort(&b);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sorted_insertion`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sorted_merge`
[INFO] [stdout]   --> examples/algo.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let sorted_merge = merge::sort(&c);
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sorted_merge`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sorted_quick`
[INFO] [stdout]   --> examples/algo.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let sorted_quick = quick::sort(&d);
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sorted_quick`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "e73c6d136b9eb72ee2470a4acb160dcb09396bdd8b3b01fdba24d052f617870f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e73c6d136b9eb72ee2470a4acb160dcb09396bdd8b3b01fdba24d052f617870f", kill_on_drop: false }`
[INFO] [stdout] e73c6d136b9eb72ee2470a4acb160dcb09396bdd8b3b01fdba24d052f617870f