[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#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodynhanpham%2Fword-frequency-analysis" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-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-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/codynhanpham/word-frequency-analysis on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9b99f369734fbf3116c4367d6b2edf3d1745a7126aeadffba5114a4b272df5bc
[INFO] running `Command { std: "docker" "start" "-a" "9b99f369734fbf3116c4367d6b2edf3d1745a7126aeadffba5114a4b272df5bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b99f369734fbf3116c4367d6b2edf3d1745a7126aeadffba5114a4b272df5bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b99f369734fbf3116c4367d6b2edf3d1745a7126aeadffba5114a4b272df5bc", kill_on_drop: false }`
[INFO] [stdout] 9b99f369734fbf3116c4367d6b2edf3d1745a7126aeadffba5114a4b272df5bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3bd7b55de320923c6228d4c3426d68fd16f3cef05eee9958add14f7484d5ee2
[INFO] running `Command { std: "docker" "start" "-a" "c3bd7b55de320923c6228d4c3426d68fd16f3cef05eee9958add14f7484d5ee2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling thiserror v1.0.43
[INFO] [stderr]    Compiling phf_shared v0.11.2
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]    Compiling quote v1.0.31
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]    Compiling syn v2.0.26
[INFO] [stderr]     Checking phf v0.11.2
[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]     Checking crossbeam-channel v0.5.8
[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 nix v0.26.2
[INFO] [stderr]     Checking which v4.4.0
[INFO] [stderr]     Checking rayon-core v1.11.0
[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/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/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/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/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/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 10.55s
[INFO] running `Command { std: "docker" "inspect" "c3bd7b55de320923c6228d4c3426d68fd16f3cef05eee9958add14f7484d5ee2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3bd7b55de320923c6228d4c3426d68fd16f3cef05eee9958add14f7484d5ee2", kill_on_drop: false }`
[INFO] [stdout] c3bd7b55de320923c6228d4c3426d68fd16f3cef05eee9958add14f7484d5ee2
