[INFO] cloning repository https://github.com/codynhanpham/word-frequency-analysis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/codynhanpham/word-frequency-analysis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodynhanpham%2Fword-frequency-analysis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodynhanpham%2Fword-frequency-analysis'...
[INFO] [stderr] fatal: write error: No space left on device
[INFO] [stderr] fatal: fetch-pack: invalid index-pack output
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/codynhanpham/word-frequency-analysis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/codynhanpham/word-frequency-analysis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodynhanpham%2Fword-frequency-analysis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodynhanpham%2Fword-frequency-analysis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4b2153b9b4552597471425b2fb23bf49cc884bcb
[INFO] checking codynhanpham/word-frequency-analysis against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodynhanpham%2Fword-frequency-analysis" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/codynhanpham/word-frequency-analysis
[INFO] finished tweaking git repo https://github.com/codynhanpham/word-frequency-analysis
[INFO] tweaked toml for git repo https://github.com/codynhanpham/word-frequency-analysis written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/codynhanpham/word-frequency-analysis on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/codynhanpham/word-frequency-analysis 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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] Error response from daemon: symlink ../4b139227960dd137429fac72e55b8dcc25156abfd286231b946eca1759c58558/diff /var/lib/docker/overlay2/l/E2EBGG3H2O53C4HGFVRXLS4NA5: no space left on device
[INFO] checking codynhanpham/word-frequency-analysis against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodynhanpham%2Fword-frequency-analysis" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/codynhanpham/word-frequency-analysis
[INFO] finished tweaking git repo https://github.com/codynhanpham/word-frequency-analysis
[INFO] tweaked toml for git repo https://github.com/codynhanpham/word-frequency-analysis written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/codynhanpham/word-frequency-analysis on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/codynhanpham/word-frequency-analysis 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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff799256849e37e5ab4828e0b987a8fd52417e286e67739a7ee8258cba51030a
[INFO] running `Command { std: "docker" "start" "-a" "ff799256849e37e5ab4828e0b987a8fd52417e286e67739a7ee8258cba51030a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff799256849e37e5ab4828e0b987a8fd52417e286e67739a7ee8258cba51030a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff799256849e37e5ab4828e0b987a8fd52417e286e67739a7ee8258cba51030a", kill_on_drop: false }`
[INFO] [stdout] ff799256849e37e5ab4828e0b987a8fd52417e286e67739a7ee8258cba51030a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 877a9c6c5624873c7fb33750829333444762f9b23eacbb90b38597ac6f24f77f
[INFO] running `Command { std: "docker" "start" "-a" "877a9c6c5624873c7fb33750829333444762f9b23eacbb90b38597ac6f24f77f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]    Compiling thiserror v1.0.43
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]     Checking phf_shared v0.11.2
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking phf v0.11.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]    Compiling quote v1.0.31
[INFO] [stderr]    Compiling phf_generator v0.11.2
[INFO] [stderr]    Compiling phf_codegen v0.11.2
[INFO] [stderr]    Compiling terminfo v0.8.0
[INFO] [stderr]    Compiling syn v2.0.26
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking which v4.4.0
[INFO] [stderr]     Checking nix v0.26.2
[INFO] [stderr]     Checking dirs v4.0.0
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.43
[INFO] [stderr]     Checking clearscreen v2.0.1
[INFO] [stderr]     Checking word-frequency-analysis v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/main.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     drop(start);
[INFO] [stdout]    |     ^^^^^-----^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          argument has type `Instant`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 94 -     drop(start);
[INFO] [stdout] 94 +     let _ = start;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/main.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     drop(duration);
[INFO] [stdout]    |     ^^^^^--------^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          argument has type `Duration`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 95 -     drop(duration);
[INFO] [stdout] 95 +     let _ = duration;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/main.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     drop(number_of_files);
[INFO] [stdout]    |     ^^^^^---------------^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          argument has type `usize`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 97 -     drop(number_of_files);
[INFO] [stdout] 97 +     let _ = number_of_files;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/analyses/word_frequency.rs:170:5
[INFO] [stdout]     |
[INFO] [stdout] 170 |     drop(folder_name);
[INFO] [stdout]     |     ^^^^^-----------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&str`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 170 -     drop(folder_name);
[INFO] [stdout] 170 +     let _ = folder_name;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/main.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     drop(start);
[INFO] [stdout]    |     ^^^^^-----^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          argument has type `Instant`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 94 -     drop(start);
[INFO] [stdout] 94 +     let _ = start;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/word_frequency.rs:172:5
[INFO] [stdout]     |
[INFO] [stdout] 172 |     drop(start);
[INFO] [stdout]     |     ^^^^^-----^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Instant`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 172 -     drop(start);
[INFO] [stdout] 172 +     let _ = start;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/word_frequency.rs:173:5
[INFO] [stdout]     |
[INFO] [stdout] 173 |     drop(duration);
[INFO] [stdout]     |     ^^^^^--------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Duration`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 173 -     drop(duration);
[INFO] [stdout] 173 +     let _ = duration;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/main.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     drop(duration);
[INFO] [stdout]    |     ^^^^^--------^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          argument has type `Duration`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 95 -     drop(duration);
[INFO] [stdout] 95 +     let _ = duration;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/main.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     drop(number_of_files);
[INFO] [stdout]    |     ^^^^^---------------^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          argument has type `usize`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 97 -     drop(number_of_files);
[INFO] [stdout] 97 +     let _ = number_of_files;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/word_frequency.rs:174:5
[INFO] [stdout]     |
[INFO] [stdout] 174 |     drop(start_total);
[INFO] [stdout]     |     ^^^^^-----------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Instant`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 174 -     drop(start_total);
[INFO] [stdout] 174 +     let _ = start_total;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/analyses/word_frequency.rs:170:5
[INFO] [stdout]     |
[INFO] [stdout] 170 |     drop(folder_name);
[INFO] [stdout]     |     ^^^^^-----------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&str`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 170 -     drop(folder_name);
[INFO] [stdout] 170 +     let _ = folder_name;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/word_frequency.rs:172:5
[INFO] [stdout]     |
[INFO] [stdout] 172 |     drop(start);
[INFO] [stdout]     |     ^^^^^-----^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Instant`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 172 -     drop(start);
[INFO] [stdout] 172 +     let _ = start;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/word_frequency.rs:173:5
[INFO] [stdout]     |
[INFO] [stdout] 173 |     drop(duration);
[INFO] [stdout]     |     ^^^^^--------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Duration`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 173 -     drop(duration);
[INFO] [stdout] 173 +     let _ = duration;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/word_frequency.rs:174:5
[INFO] [stdout]     |
[INFO] [stdout] 174 |     drop(start_total);
[INFO] [stdout]     |     ^^^^^-----------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Instant`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 174 -     drop(start_total);
[INFO] [stdout] 174 +     let _ = start_total;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/word_frequency.rs:175:5
[INFO] [stdout]     |
[INFO] [stdout] 175 |     drop(duration);
[INFO] [stdout]     |     ^^^^^--------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Duration`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 175 -     drop(duration);
[INFO] [stdout] 175 +     let _ = duration;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:154:5
[INFO] [stdout]     |
[INFO] [stdout] 154 |     drop(folder_name);
[INFO] [stdout]     |     ^^^^^-----------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&str`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 154 -     drop(folder_name);
[INFO] [stdout] 154 +     let _ = folder_name;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     drop(has_chapters);
[INFO] [stdout]     |     ^^^^^------------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `bool`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 157 -     drop(has_chapters);
[INFO] [stdout] 157 +     let _ = has_chapters;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/word_frequency.rs:175:5
[INFO] [stdout]     |
[INFO] [stdout] 175 |     drop(duration);
[INFO] [stdout]     |     ^^^^^--------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Duration`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 175 -     drop(duration);
[INFO] [stdout] 175 +     let _ = duration;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:154:5
[INFO] [stdout]     |
[INFO] [stdout] 154 |     drop(folder_name);
[INFO] [stdout]     |     ^^^^^-----------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&str`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 154 -     drop(folder_name);
[INFO] [stdout] 154 +     let _ = folder_name;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     drop(has_chapters);
[INFO] [stdout]     |     ^^^^^------------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `bool`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 157 -     drop(has_chapters);
[INFO] [stdout] 157 +     let _ = has_chapters;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:158:5
[INFO] [stdout]     |
[INFO] [stdout] 158 |     drop(start);
[INFO] [stdout]     |     ^^^^^-----^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Instant`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 158 -     drop(start);
[INFO] [stdout] 158 +     let _ = start;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:159:5
[INFO] [stdout]     |
[INFO] [stdout] 159 |     drop(duration);
[INFO] [stdout]     |     ^^^^^--------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Duration`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 159 -     drop(duration);
[INFO] [stdout] 159 +     let _ = duration;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 160 |     drop(start_total);
[INFO] [stdout]     |     ^^^^^-----------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Instant`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 160 -     drop(start_total);
[INFO] [stdout] 160 +     let _ = start_total;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 161 |     drop(duration_total);
[INFO] [stdout]     |     ^^^^^--------------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Duration`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 161 -     drop(duration_total);
[INFO] [stdout] 161 +     let _ = duration_total;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:158:5
[INFO] [stdout]     |
[INFO] [stdout] 158 |     drop(start);
[INFO] [stdout]     |     ^^^^^-----^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Instant`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 158 -     drop(start);
[INFO] [stdout] 158 +     let _ = start;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:159:5
[INFO] [stdout]     |
[INFO] [stdout] 159 |     drop(duration);
[INFO] [stdout]     |     ^^^^^--------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Duration`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 159 -     drop(duration);
[INFO] [stdout] 159 +     let _ = duration;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 160 |     drop(start_total);
[INFO] [stdout]     |     ^^^^^-----------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Instant`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 160 -     drop(start_total);
[INFO] [stdout] 160 +     let _ = start_total;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/analyses/tf_idf.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 161 |     drop(duration_total);
[INFO] [stdout]     |     ^^^^^--------------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `Duration`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 161 -     drop(duration_total);
[INFO] [stdout] 161 +     let _ = duration_total;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.13s
[INFO] running `Command { std: "docker" "inspect" "877a9c6c5624873c7fb33750829333444762f9b23eacbb90b38597ac6f24f77f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "877a9c6c5624873c7fb33750829333444762f9b23eacbb90b38597ac6f24f77f", kill_on_drop: false }`
[INFO] [stdout] 877a9c6c5624873c7fb33750829333444762f9b23eacbb90b38597ac6f24f77f