[INFO] cloning repository https://github.com/ogioldat/comprehansive-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ogioldat/comprehansive-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fogioldat%2Fcomprehansive-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fogioldat%2Fcomprehansive-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 299c846bb96d1764bb4921cfa864f45a21e68082
[INFO] checking ogioldat/comprehansive-rust/299c846bb96d1764bb4921cfa864f45a21e68082 against master#f2d69d5a7c04617d122facd0a7a5bdde0af928ae for pr-138363
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fogioldat%2Fcomprehansive-rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ogioldat/comprehansive-rust on toolchain f2d69d5a7c04617d122facd0a7a5bdde0af928ae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f2d69d5a7c04617d122facd0a7a5bdde0af928ae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ogioldat/comprehansive-rust
[INFO] finished tweaking git repo https://github.com/ogioldat/comprehansive-rust
[INFO] tweaked toml for git repo https://github.com/ogioldat/comprehansive-rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ogioldat/comprehansive-rust 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" "+f2d69d5a7c04617d122facd0a7a5bdde0af928ae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+f2d69d5a7c04617d122facd0a7a5bdde0af928ae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7aa4b85ac1357f7fefa4f937f64e227d5feb87ed8a0451e4758446c05228eaba
[INFO] running `Command { std: "docker" "start" "-a" "7aa4b85ac1357f7fefa4f937f64e227d5feb87ed8a0451e4758446c05228eaba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7aa4b85ac1357f7fefa4f937f64e227d5feb87ed8a0451e4758446c05228eaba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7aa4b85ac1357f7fefa4f937f64e227d5feb87ed8a0451e4758446c05228eaba", kill_on_drop: false }`
[INFO] [stdout] 7aa4b85ac1357f7fefa4f937f64e227d5feb87ed8a0451e4758446c05228eaba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+f2d69d5a7c04617d122facd0a7a5bdde0af928ae" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05b5d42bc209f0531a4dd8f4b5b51a1b11aa1765b82fbad02b58514cd90d3d54
[INFO] running `Command { std: "docker" "start" "-a" "05b5d42bc209f0531a4dd8f4b5b51a1b11aa1765b82fbad02b58514cd90d3d54", kill_on_drop: false }`
[INFO] [stderr]     Checking compr-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/builder_type.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn new(name: impl Into<String>) -> Self {
[INFO] [stdout]    |            ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `authors`
[INFO] [stdout]   --> src/builder_type.rs:47:26
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn authors(mut self, authors: Vec<String>) -> Self {
[INFO] [stdout]    |                          ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_authors`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/builder_type.rs:47:16
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn authors(mut self, authors: Vec<String>) -> Self {
[INFO] [stdout]    |                ----^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependency`
[INFO] [stdout]   --> src/builder_type.rs:52:29
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn dependency(mut self, dependency: Dependency) -> Self {
[INFO] [stdout]    |                             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dependency`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/builder_type.rs:52:19
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn dependency(mut self, dependency: Dependency) -> Self {
[INFO] [stdout]    |                   ----^^^^
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `language`
[INFO] [stdout]   --> src/builder_type.rs:57:27
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn language(mut self, language: Language) -> Self {
[INFO] [stdout]    |                           ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_language`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/builder_type.rs:57:17
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn language(mut self, language: Language) -> Self {
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Java` and `Perl` are never constructed
[INFO] [stdout]  --> src/builder_type.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Language {
[INFO] [stdout]   |      -------- variants in this enum
[INFO] [stdout] 3 |     Rust,
[INFO] [stdout] 4 |     Java,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     Perl,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Language` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `version_expression` are never read
[INFO] [stdout]   --> src/builder_type.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Dependency {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 10 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     version_expression: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dependency` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `authors`, `dependencies`, and `language` are never read
[INFO] [stdout]   --> src/builder_type.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Package {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 17 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 18 |     version: String,
[INFO] [stdout] 19 |     authors: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 20 |     dependencies: Vec<Dependency>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 21 |     language: Option<Language>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Package` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]  --> src/counter.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Counter<K: Hash + Eq> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `count`, and `times_seen` are never used
[INFO] [stdout]   --> src/counter.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl<K: Hash + Eq> Counter<K> {
[INFO] [stdout]    | ----------------------------- associated items in this implementation
[INFO] [stdout] 10 |     /// Create a new Counter.
[INFO] [stdout] 11 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn count(&mut self, value: K) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn times_seen(&self, value: K) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `counter` is never used
[INFO] [stdout]   --> src/counter.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn counter() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `LessThan` is never used
[INFO] [stdout]  --> src/generic_min.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait LessThan {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Citation` is never constructed
[INFO] [stdout]  --> src/generic_min.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Citation {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `min` is never used
[INFO] [stdout]   --> src/generic_min.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn min<T: LessThan>(c1: T, c2: T) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generic_min` is never used
[INFO] [stdout]   --> src/generic_min.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn generic_min() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Logger` is never used
[INFO] [stdout]  --> src/logger.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Logger {
[INFO] [stdout]   |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StderrLogger` is never constructed
[INFO] [stdout]  --> src/logger.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct StderrLogger;
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_things` is never used
[INFO] [stdout]   --> src/logger.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn do_things(logger: &impl Logger) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VerbosityFilter` is never constructed
[INFO] [stdout]   --> src/logger.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct VerbosityFilter<T: Logger> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `logger` is never used
[INFO] [stdout]   --> src/logger.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn logger() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RotDecoder` is never constructed
[INFO] [stdout]  --> src/rot.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct RotDecoder<R: Read> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rot` is never used
[INFO] [stdout]   --> src/rot.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn rot() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/builder_type.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn new(name: impl Into<String>) -> Self {
[INFO] [stdout]    |            ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `authors`
[INFO] [stdout]   --> src/builder_type.rs:47:26
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn authors(mut self, authors: Vec<String>) -> Self {
[INFO] [stdout]    |                          ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_authors`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/builder_type.rs:47:16
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn authors(mut self, authors: Vec<String>) -> Self {
[INFO] [stdout]    |                ----^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dependency`
[INFO] [stdout]   --> src/builder_type.rs:52:29
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn dependency(mut self, dependency: Dependency) -> Self {
[INFO] [stdout]    |                             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dependency`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/builder_type.rs:52:19
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn dependency(mut self, dependency: Dependency) -> Self {
[INFO] [stdout]    |                   ----^^^^
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `language`
[INFO] [stdout]   --> src/builder_type.rs:57:27
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn language(mut self, language: Language) -> Self {
[INFO] [stdout]    |                           ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_language`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/builder_type.rs:57:17
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn language(mut self, language: Language) -> Self {
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Java` and `Perl` are never constructed
[INFO] [stdout]  --> src/builder_type.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Language {
[INFO] [stdout]   |      -------- variants in this enum
[INFO] [stdout] 3 |     Rust,
[INFO] [stdout] 4 |     Java,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     Perl,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Language` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `version_expression` are never read
[INFO] [stdout]   --> src/builder_type.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Dependency {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 10 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     version_expression: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dependency` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `authors`, `dependencies`, and `language` are never read
[INFO] [stdout]   --> src/builder_type.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Package {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 17 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 18 |     version: String,
[INFO] [stdout] 19 |     authors: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 20 |     dependencies: Vec<Dependency>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 21 |     language: Option<Language>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Package` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]  --> src/counter.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Counter<K: Hash + Eq> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `count`, and `times_seen` are never used
[INFO] [stdout]   --> src/counter.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl<K: Hash + Eq> Counter<K> {
[INFO] [stdout]    | ----------------------------- associated items in this implementation
[INFO] [stdout] 10 |     /// Create a new Counter.
[INFO] [stdout] 11 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn count(&mut self, value: K) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn times_seen(&self, value: K) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `counter` is never used
[INFO] [stdout]   --> src/counter.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn counter() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `LessThan` is never used
[INFO] [stdout]  --> src/generic_min.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait LessThan {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Citation` is never constructed
[INFO] [stdout]  --> src/generic_min.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Citation {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `min` is never used
[INFO] [stdout]   --> src/generic_min.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn min<T: LessThan>(c1: T, c2: T) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generic_min` is never used
[INFO] [stdout]   --> src/generic_min.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn generic_min() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Logger` is never used
[INFO] [stdout]  --> src/logger.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Logger {
[INFO] [stdout]   |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StderrLogger` is never constructed
[INFO] [stdout]  --> src/logger.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct StderrLogger;
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_things` is never used
[INFO] [stdout]   --> src/logger.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn do_things(logger: &impl Logger) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VerbosityFilter` is never constructed
[INFO] [stdout]   --> src/logger.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct VerbosityFilter<T: Logger> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `logger` is never used
[INFO] [stdout]   --> src/logger.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn logger() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rot` is never used
[INFO] [stdout]   --> src/rot.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn rot() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "05b5d42bc209f0531a4dd8f4b5b51a1b11aa1765b82fbad02b58514cd90d3d54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05b5d42bc209f0531a4dd8f4b5b51a1b11aa1765b82fbad02b58514cd90d3d54", kill_on_drop: false }`
[INFO] [stdout] 05b5d42bc209f0531a4dd8f4b5b51a1b11aa1765b82fbad02b58514cd90d3d54