[INFO] cloning repository https://github.com/kks110/rust-book-tasts
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kks110/rust-book-tasts" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkks110%2Frust-book-tasts", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkks110%2Frust-book-tasts'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c635b70b7e906b7b8ece5b1b8dfe5d4889ee606c
[INFO] testing kks110/rust-book-tasts against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkks110%2Frust-book-tasts" "/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/kks110/rust-book-tasts on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kks110/rust-book-tasts
[INFO] finished tweaking git repo https://github.com/kks110/rust-book-tasts
[INFO] tweaked toml for git repo https://github.com/kks110/rust-book-tasts written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/kks110/rust-book-tasts already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "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" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a78b8e57c831fc698c2589f21d41af1539463e7a9396a90abfbb6d212d366b1e
[INFO] running `Command { std: "docker" "start" "-a" "a78b8e57c831fc698c2589f21d41af1539463e7a9396a90abfbb6d212d366b1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a78b8e57c831fc698c2589f21d41af1539463e7a9396a90abfbb6d212d366b1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a78b8e57c831fc698c2589f21d41af1539463e7a9396a90abfbb6d212d366b1e", kill_on_drop: false }`
[INFO] [stdout] a78b8e57c831fc698c2589f21d41af1539463e7a9396a90abfbb6d212d366b1e
[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" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5209ac7160ce7def0a896c1356e44ae3cd33b15c35d5d63c5dc0b04864def934
[INFO] running `Command { std: "docker" "start" "-a" "5209ac7160ce7def0a896c1356e44ae3cd33b15c35d5d63c5dc0b04864def934", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling rust_book_tasks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/company_directory/mod.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |             &engineering.sort();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/company_directory/mod.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             &sales.sort();
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.90s
[INFO] running `Command { std: "docker" "inspect" "5209ac7160ce7def0a896c1356e44ae3cd33b15c35d5d63c5dc0b04864def934", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5209ac7160ce7def0a896c1356e44ae3cd33b15c35d5d63c5dc0b04864def934", kill_on_drop: false }`
[INFO] [stdout] 5209ac7160ce7def0a896c1356e44ae3cd33b15c35d5d63c5dc0b04864def934
[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" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bbd80c6df6610c4c363fbf3384f661f189e30381efdc5e36688adbf398f029b4
[INFO] running `Command { std: "docker" "start" "-a" "bbd80c6df6610c4c363fbf3384f661f189e30381efdc5e36688adbf398f029b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_book_tasks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/company_directory/mod.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |             &engineering.sort();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/company_directory/mod.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             &sales.sort();
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.63s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "bbd80c6df6610c4c363fbf3384f661f189e30381efdc5e36688adbf398f029b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbd80c6df6610c4c363fbf3384f661f189e30381efdc5e36688adbf398f029b4", kill_on_drop: false }`
[INFO] [stdout] bbd80c6df6610c4c363fbf3384f661f189e30381efdc5e36688adbf398f029b4
[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" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8da8c1c4999a73888ee6c251f5c1ee664eaf24912f0baae8ab0b5e18f60fbe5e
[INFO] running `Command { std: "docker" "start" "-a" "8da8c1c4999a73888ee6c251f5c1ee664eaf24912f0baae8ab0b5e18f60fbe5e", kill_on_drop: false }`
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]   --> src/company_directory/mod.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 |             &engineering.sort();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]   --> src/company_directory/mod.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |             &sales.sort();
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_book_tasks` (bin "rust_book_tasks" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_book_tasks-2589afc0e2aad057)
[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" "8da8c1c4999a73888ee6c251f5c1ee664eaf24912f0baae8ab0b5e18f60fbe5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8da8c1c4999a73888ee6c251f5c1ee664eaf24912f0baae8ab0b5e18f60fbe5e", kill_on_drop: false }`
[INFO] [stdout] 8da8c1c4999a73888ee6c251f5c1ee664eaf24912f0baae8ab0b5e18f60fbe5e