[INFO] cloning repository https://github.com/UMM-CSci-Systems/sorting-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/UMM-CSci-Systems/sorting-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUMM-CSci-Systems%2Fsorting-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUMM-CSci-Systems%2Fsorting-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32638a49a01fe1419d43c26b3d22c1dbdba3e84e
[INFO] checking UMM-CSci-Systems/sorting-in-rust against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUMM-CSci-Systems%2Fsorting-in-rust" "/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/UMM-CSci-Systems/sorting-in-rust on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/UMM-CSci-Systems/sorting-in-rust
[INFO] finished tweaking git repo https://github.com/UMM-CSci-Systems/sorting-in-rust
[INFO] tweaked toml for git repo https://github.com/UMM-CSci-Systems/sorting-in-rust written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/UMM-CSci-Systems/sorting-in-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39c02acf23ecab51459320a6f61c987d0fc8160ca2513d7c269ad972329c5997
[INFO] running `Command { std: "docker" "start" "-a" "39c02acf23ecab51459320a6f61c987d0fc8160ca2513d7c269ad972329c5997", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39c02acf23ecab51459320a6f61c987d0fc8160ca2513d7c269ad972329c5997", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39c02acf23ecab51459320a6f61c987d0fc8160ca2513d7c269ad972329c5997", kill_on_drop: false }`
[INFO] [stdout] 39c02acf23ecab51459320a6f61c987d0fc8160ca2513d7c269ad972329c5997
[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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d40247299144b232facd2fdce6dc31cbdcf94c081b579df1e8c37b98c8f2eccf
[INFO] running `Command { std: "docker" "start" "-a" "d40247299144b232facd2fdce6dc31cbdcf94c081b579df1e8c37b98c8f2eccf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking sorting-in-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `ys`
[INFO] [stdout]    --> src/main.rs:145:75
[INFO] [stdout]     |
[INFO] [stdout] 145 | fn merge<T: PartialOrd + std::marker::Copy + std::fmt::Debug>(xs: Vec<T>, ys: Vec<T>) -> Vec<T> {
[INFO] [stdout]     |                                                                           ^^ help: if this is intentional, prefix it with an underscore: `_ys`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ys`
[INFO] [stdout]    --> src/main.rs:145:75
[INFO] [stdout]     |
[INFO] [stdout] 145 | fn merge<T: PartialOrd + std::marker::Copy + std::fmt::Debug>(xs: Vec<T>, ys: Vec<T>) -> Vec<T> {
[INFO] [stdout]     |                                                                           ^^ help: if this is intentional, prefix it with an underscore: `_ys`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.41s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d40247299144b232facd2fdce6dc31cbdcf94c081b579df1e8c37b98c8f2eccf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d40247299144b232facd2fdce6dc31cbdcf94c081b579df1e8c37b98c8f2eccf", kill_on_drop: false }`
[INFO] [stdout] d40247299144b232facd2fdce6dc31cbdcf94c081b579df1e8c37b98c8f2eccf