[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 try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkks110%2Frust-book-tasts" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kks110/rust-book-tasts on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "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-9/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3c18dd6b3c77f45b1a3223ed4f435a4aff6aa839c86c92e1b95f1acb823c98b
[INFO] running `Command { std: "docker" "start" "-a" "a3c18dd6b3c77f45b1a3223ed4f435a4aff6aa839c86c92e1b95f1acb823c98b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3c18dd6b3c77f45b1a3223ed4f435a4aff6aa839c86c92e1b95f1acb823c98b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3c18dd6b3c77f45b1a3223ed4f435a4aff6aa839c86c92e1b95f1acb823c98b", kill_on_drop: false }`
[INFO] [stdout] a3c18dd6b3c77f45b1a3223ed4f435a4aff6aa839c86c92e1b95f1acb823c98b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ebce20f6419aa03dff932a8df7e9192b858ffedb2df3260e70fb70279eb38090
[INFO] running `Command { std: "docker" "start" "-a" "ebce20f6419aa03dff932a8df7e9192b858ffedb2df3260e70fb70279eb38090", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[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 5.27s
[INFO] running `Command { std: "docker" "inspect" "ebce20f6419aa03dff932a8df7e9192b858ffedb2df3260e70fb70279eb38090", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebce20f6419aa03dff932a8df7e9192b858ffedb2df3260e70fb70279eb38090", kill_on_drop: false }`
[INFO] [stdout] ebce20f6419aa03dff932a8df7e9192b858ffedb2df3260e70fb70279eb38090
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad020cad6dd08c4e28fa5a40f820934dc30610a19fb885df52e8b74b93595dd3
[INFO] running `Command { std: "docker" "start" "-a" "ad020cad6dd08c4e28fa5a40f820934dc30610a19fb885df52e8b74b93595dd3", 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] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "ad020cad6dd08c4e28fa5a40f820934dc30610a19fb885df52e8b74b93595dd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad020cad6dd08c4e28fa5a40f820934dc30610a19fb885df52e8b74b93595dd3", kill_on_drop: false }`
[INFO] [stdout] ad020cad6dd08c4e28fa5a40f820934dc30610a19fb885df52e8b74b93595dd3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a2ef25dd767dc31280884a23c2e552e4087d98bf28667d2b7e2c077837ec7d05
[INFO] running `Command { std: "docker" "start" "-a" "a2ef25dd767dc31280884a23c2e552e4087d98bf28667d2b7e2c077837ec7d05", 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: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[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" "a2ef25dd767dc31280884a23c2e552e4087d98bf28667d2b7e2c077837ec7d05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2ef25dd767dc31280884a23c2e552e4087d98bf28667d2b7e2c077837ec7d05", kill_on_drop: false }`
[INFO] [stdout] a2ef25dd767dc31280884a23c2e552e4087d98bf28667d2b7e2c077837ec7d05