[INFO] cloning repository https://github.com/raymondboswel/datastructures
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/raymondboswel/datastructures" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraymondboswel%2Fdatastructures", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraymondboswel%2Fdatastructures'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7b9cfc937c5d2c5e2d3ddfaa06e2bf6f4807c75b
[INFO] testing raymondboswel/datastructures against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraymondboswel%2Fdatastructures" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/raymondboswel/datastructures on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/raymondboswel/datastructures
[INFO] finished tweaking git repo https://github.com/raymondboswel/datastructures
[INFO] tweaked toml for git repo https://github.com/raymondboswel/datastructures written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate git repo https://github.com/raymondboswel/datastructures already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a78cd7139a2e5f10f7265cbcec491f572d7df85c4d5b969f4d84b5bff4bd6941
[INFO] running `Command { std: "docker" "start" "-a" "a78cd7139a2e5f10f7265cbcec491f572d7df85c4d5b969f4d84b5bff4bd6941", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a78cd7139a2e5f10f7265cbcec491f572d7df85c4d5b969f4d84b5bff4bd6941", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a78cd7139a2e5f10f7265cbcec491f572d7df85c4d5b969f4d84b5bff4bd6941", kill_on_drop: false }`
[INFO] [stdout] a78cd7139a2e5f10f7265cbcec491f572d7df85c4d5b969f4d84b5bff4bd6941
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5322d7cd97c30de9a85ce36ced87f1a795d8e8df9c52edc4a182569aae1858ca
[INFO] running `Command { std: "docker" "start" "-a" "5322d7cd97c30de9a85ce36ced87f1a795d8e8df9c52edc4a182569aae1858ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling datastructures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/ch1/ex1.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufRead`, `self`
[INFO] [stdout]  --> src/ch1/ex1.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::{self, BufRead};
[INFO] [stdout]   |               ^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ch1::ex1::filter_duplicates`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use ch1::ex1::filter_duplicates;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ch1::ex1::only_duplicates`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use ch1::ex1::only_duplicates;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ch1::ex1::queue_n_till_blank_line`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use ch1::ex1::queue_n_till_blank_line;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ch1::ex1::reverse_lines`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use ch1::ex1::reverse_lines;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ch1::ex1::reverse_n_lines`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use ch1::ex1::reverse_n_lines;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `empty`
[INFO] [stdout]   --> src/ch1/ex1.rs:68:21
[INFO] [stdout]    |
[INFO] [stdout] 68 |                 let empty = "".to_string();
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_empty`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ch1/ex1.rs:55:44
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn queue_n_till_blank_line<P>(path: P, n: u8)
[INFO] [stdout]    |                                            ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reverse_lines`
[INFO] [stdout]   --> src/ch1/ex1.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn reverse_lines<P>(path: P)
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reverse_n_lines`
[INFO] [stdout]   --> src/ch1/ex1.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn reverse_n_lines<P>(path: P, n: u8)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `queue_n_till_blank_line`
[INFO] [stdout]   --> src/ch1/ex1.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn queue_n_till_blank_line<P>(path: P, n: u8)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `filter_duplicates`
[INFO] [stdout]   --> src/ch1/ex1.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub fn filter_duplicates<P>(path: P)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `only_duplicates`
[INFO] [stdout]    --> src/ch1/ex1.rs:106:8
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub fn only_duplicates<P>(path: P)
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `Command { std: "docker" "inspect" "5322d7cd97c30de9a85ce36ced87f1a795d8e8df9c52edc4a182569aae1858ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5322d7cd97c30de9a85ce36ced87f1a795d8e8df9c52edc4a182569aae1858ca", kill_on_drop: false }`
[INFO] [stdout] 5322d7cd97c30de9a85ce36ced87f1a795d8e8df9c52edc4a182569aae1858ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e36c6943151957f70e87c847758bda45b71d879b6e1b9cf023b68021c8bc825e
[INFO] running `Command { std: "docker" "start" "-a" "e36c6943151957f70e87c847758bda45b71d879b6e1b9cf023b68021c8bc825e", kill_on_drop: false }`
[INFO] [stderr]    Compiling datastructures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/ch1/ex1.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufRead`, `self`
[INFO] [stdout]  --> src/ch1/ex1.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::{self, BufRead};
[INFO] [stdout]   |               ^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ch1::ex1::filter_duplicates`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use ch1::ex1::filter_duplicates;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ch1::ex1::only_duplicates`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use ch1::ex1::only_duplicates;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ch1::ex1::queue_n_till_blank_line`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use ch1::ex1::queue_n_till_blank_line;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ch1::ex1::reverse_lines`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use ch1::ex1::reverse_lines;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ch1::ex1::reverse_n_lines`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use ch1::ex1::reverse_n_lines;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `empty`
[INFO] [stdout]   --> src/ch1/ex1.rs:68:21
[INFO] [stdout]    |
[INFO] [stdout] 68 |                 let empty = "".to_string();
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_empty`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ch1/ex1.rs:55:44
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn queue_n_till_blank_line<P>(path: P, n: u8)
[INFO] [stdout]    |                                            ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reverse_lines`
[INFO] [stdout]   --> src/ch1/ex1.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn reverse_lines<P>(path: P)
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reverse_n_lines`
[INFO] [stdout]   --> src/ch1/ex1.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn reverse_n_lines<P>(path: P, n: u8)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `queue_n_till_blank_line`
[INFO] [stdout]   --> src/ch1/ex1.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn queue_n_till_blank_line<P>(path: P, n: u8)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `filter_duplicates`
[INFO] [stdout]   --> src/ch1/ex1.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub fn filter_duplicates<P>(path: P)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `only_duplicates`
[INFO] [stdout]    --> src/ch1/ex1.rs:106:8
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub fn only_duplicates<P>(path: P)
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.33s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/datastructures-96b21b43a54342ca)
[INFO] running `Command { std: "docker" "inspect" "e36c6943151957f70e87c847758bda45b71d879b6e1b9cf023b68021c8bc825e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e36c6943151957f70e87c847758bda45b71d879b6e1b9cf023b68021c8bc825e", kill_on_drop: false }`
[INFO] [stdout] e36c6943151957f70e87c847758bda45b71d879b6e1b9cf023b68021c8bc825e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8236a3ab38d6cabf9c6573fb3191f380f387639b9efe3ee54b44e27bc13bc09c
[INFO] running `Command { std: "docker" "start" "-a" "8236a3ab38d6cabf9c6573fb3191f380f387639b9efe3ee54b44e27bc13bc09c", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/ch1/ex1.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `self`
[INFO] [stderr]  --> src/ch1/ex1.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{self, BufRead};
[INFO] [stderr]   |               ^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ch1::ex1::filter_duplicates`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use ch1::ex1::filter_duplicates;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ch1::ex1::only_duplicates`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use ch1::ex1::only_duplicates;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ch1::ex1::queue_n_till_blank_line`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use ch1::ex1::queue_n_till_blank_line;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ch1::ex1::reverse_lines`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use ch1::ex1::reverse_lines;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ch1::ex1::reverse_n_lines`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use ch1::ex1::reverse_n_lines;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `empty`
[INFO] [stderr]   --> src/ch1/ex1.rs:68:21
[INFO] [stderr]    |
[INFO] [stderr] 68 |                 let empty = "".to_string();
[INFO] [stderr]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_empty`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/ch1/ex1.rs:55:44
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn queue_n_till_blank_line<P>(path: P, n: u8)
[INFO] [stderr]    |                                            ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse_lines`
[INFO] [stderr]   --> src/ch1/ex1.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub fn reverse_lines<P>(path: P)
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse_n_lines`
[INFO] [stderr]   --> src/ch1/ex1.rs:31:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub fn reverse_n_lines<P>(path: P, n: u8)
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `queue_n_till_blank_line`
[INFO] [stderr]   --> src/ch1/ex1.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn queue_n_till_blank_line<P>(path: P, n: u8)
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `filter_duplicates`
[INFO] [stderr]   --> src/ch1/ex1.rs:83:8
[INFO] [stderr]    |
[INFO] [stderr] 83 | pub fn filter_duplicates<P>(path: P)
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `only_duplicates`
[INFO] [stderr]    --> src/ch1/ex1.rs:106:8
[INFO] [stderr]     |
[INFO] [stderr] 106 | pub fn only_duplicates<P>(path: P)
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `datastructures` (bin "datastructures" test) generated 14 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/datastructures-96b21b43a54342ca)
[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" "8236a3ab38d6cabf9c6573fb3191f380f387639b9efe3ee54b44e27bc13bc09c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8236a3ab38d6cabf9c6573fb3191f380f387639b9efe3ee54b44e27bc13bc09c", kill_on_drop: false }`
[INFO] [stdout] 8236a3ab38d6cabf9c6573fb3191f380f387639b9efe3ee54b44e27bc13bc09c