[INFO] cloning repository https://github.com/testinnplayin/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/testinnplayin/rust-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftestinnplayin%2Frust-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftestinnplayin%2Frust-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a8720b3bc233f7ada3f429aeea9d68a21d803a6f
[INFO] testing testinnplayin/rust-exercises against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftestinnplayin%2Frust-exercises" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/testinnplayin/rust-exercises
[INFO] finished tweaking git repo https://github.com/testinnplayin/rust-exercises
[INFO] tweaked toml for git repo https://github.com/testinnplayin/rust-exercises written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/testinnplayin/rust-exercises on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/testinnplayin/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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a6ce4059ca1ba8c51962a6a07f572e088a953bea0a52c455e341753fb4821a76
[INFO] running `Command { std: "docker" "start" "-a" "a6ce4059ca1ba8c51962a6a07f572e088a953bea0a52c455e341753fb4821a76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6ce4059ca1ba8c51962a6a07f572e088a953bea0a52c455e341753fb4821a76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6ce4059ca1ba8c51962a6a07f572e088a953bea0a52c455e341753fb4821a76", kill_on_drop: false }`
[INFO] [stdout] a6ce4059ca1ba8c51962a6a07f572e088a953bea0a52c455e341753fb4821a76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5dad691d68d2e0b731291db0f905cd8f7d68586701c6b01db0996c1fc1ec4f6
[INFO] running `Command { std: "docker" "start" "-a" "d5dad691d68d2e0b731291db0f905cd8f7d68586701c6b01db0996c1fc1ec4f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling chapter-8-exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/statistics_module.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     &vec_of_nums.sort();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let _ = &vec_of_nums.sort();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "d5dad691d68d2e0b731291db0f905cd8f7d68586701c6b01db0996c1fc1ec4f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5dad691d68d2e0b731291db0f905cd8f7d68586701c6b01db0996c1fc1ec4f6", kill_on_drop: false }`
[INFO] [stdout] d5dad691d68d2e0b731291db0f905cd8f7d68586701c6b01db0996c1fc1ec4f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bdb098d58c23a89fa1a2981e32beac9184dfb8d15a69700ffe691761e9148a4e
[INFO] running `Command { std: "docker" "start" "-a" "bdb098d58c23a89fa1a2981e32beac9184dfb8d15a69700ffe691761e9148a4e", kill_on_drop: false }`
[INFO] [stderr]    Compiling chapter-8-exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/statistics_module.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     &vec_of_nums.sort();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let _ = &vec_of_nums.sort();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "bdb098d58c23a89fa1a2981e32beac9184dfb8d15a69700ffe691761e9148a4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdb098d58c23a89fa1a2981e32beac9184dfb8d15a69700ffe691761e9148a4e", kill_on_drop: false }`
[INFO] [stdout] bdb098d58c23a89fa1a2981e32beac9184dfb8d15a69700ffe691761e9148a4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 15f4ae0262736241b7a486e3cb8e3173fd99dc0c7f18a419bb743748c741ea5a
[INFO] running `Command { std: "docker" "start" "-a" "15f4ae0262736241b7a486e3cb8e3173fd99dc0c7f18a419bb743748c741ea5a", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/statistics_module.rs:21:5
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 21 |     &vec_of_nums.sort();
[INFO] [stdout] 
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let _ = &vec_of_nums.sort();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `chapter-8-exercises` (bin "chapter-8-exercises" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/chapter_8_exercises-ccfe8cb4aa922fba)
[INFO] running `Command { std: "docker" "inspect" "15f4ae0262736241b7a486e3cb8e3173fd99dc0c7f18a419bb743748c741ea5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15f4ae0262736241b7a486e3cb8e3173fd99dc0c7f18a419bb743748c741ea5a", kill_on_drop: false }`
[INFO] [stdout] 15f4ae0262736241b7a486e3cb8e3173fd99dc0c7f18a419bb743748c741ea5a