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Blocking waiting for file lock on package cache [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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+969026c535f4240ff7866ef11207dfda18a26af6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 451d73b9b84ddc2761d639a86bf03bf503cce5105d4fecd3b89170103ab5f95e [INFO] running `Command { std: "docker" "start" "-a" "451d73b9b84ddc2761d639a86bf03bf503cce5105d4fecd3b89170103ab5f95e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "451d73b9b84ddc2761d639a86bf03bf503cce5105d4fecd3b89170103ab5f95e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "451d73b9b84ddc2761d639a86bf03bf503cce5105d4fecd3b89170103ab5f95e", kill_on_drop: false }` [INFO] [stdout] 451d73b9b84ddc2761d639a86bf03bf503cce5105d4fecd3b89170103ab5f95e [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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+969026c535f4240ff7866ef11207dfda18a26af6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9a2f40fe67d3728b2170111f0609696ceb724921e158185e193cac1181a6d16d [INFO] running `Command { std: "docker" "start" "-a" "9a2f40fe67d3728b2170111f0609696ceb724921e158185e193cac1181a6d16d", kill_on_drop: false }` [INFO] [stderr] Compiling temp-dir v0.1.14 [INFO] [stderr] Compiling cc v1.2.3 [INFO] [stderr] Compiling libc v0.2.168 [INFO] [stderr] Checking regex-automata v0.4.9 [INFO] [stderr] Compiling syn v2.0.90 [INFO] [stderr] Checking clap_builder v4.5.23 [INFO] [stderr] Checking chrono v0.4.39 [INFO] [stderr] Checking getrandom v0.2.15 [INFO] [stderr] Checking rand_core v0.6.4 [INFO] [stderr] Compiling gettext-sys v0.22.5 [INFO] [stderr] Compiling ncurses v5.101.0 [INFO] [stderr] Checking regex v1.11.1 [INFO] [stderr] Checking locale_config v0.3.0 [INFO] [stderr] Compiling zerocopy-derive v0.7.35 [INFO] [stderr] Compiling clap_derive v4.5.18 [INFO] [stderr] Checking zerocopy v0.7.35 [INFO] [stderr] Checking ppv-lite86 v0.2.20 [INFO] [stderr] Checking clap v4.5.23 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking rand v0.8.5 [INFO] [stderr] Checking gettext-rs v0.7.2 [INFO] [stderr] Checking vaflo v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: methods `contains` and `first_node` are never used [INFO] [stdout] --> src/dictionary.rs:28:12 [INFO] [stdout] | [INFO] [stdout] 21 | impl Dictionary { [INFO] [stdout] | --------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 28 | pub fn contains>(&self, word: I) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 58 | pub fn first_node(&self) -> Option { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `first_child`, `next_sibling`, and `letter` are never used [INFO] [stdout] --> src/dictionary.rs:108:12 [INFO] [stdout] | [INFO] [stdout] 92 | impl<'a> Node<'a> { [INFO] [stdout] | ----------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 108 | pub fn first_child(&self) -> Option> { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 116 | pub fn next_sibling(&self) -> Option> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 124 | pub fn letter(&self) -> char { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/dictionary.rs:58:23 [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option { [INFO] [stdout] | ^^^^^ ^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/dictionary.rs:58:23 [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option { [INFO] [stdout] | ^^^^^ ^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `N_SPACING_LETTERS` is never used [INFO] [stdout] --> src/grid.rs:21:11 [INFO] [stdout] | [INFO] [stdout] 21 | pub const N_SPACING_LETTERS: usize = WORD_LENGTH - N_WORDS_ON_AXIS; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `N_LETTERS` is never used [INFO] [stdout] --> src/grid.rs:23:11 [INFO] [stdout] | [INFO] [stdout] 23 | pub const N_LETTERS: usize = [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `is_solved` is never used [INFO] [stdout] --> src/grid.rs:112:12 [INFO] [stdout] | [INFO] [stdout] 90 | impl PuzzleGrid { [INFO] [stdout] | --------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 112 | pub fn is_solved(&self) -> bool { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/dictionary.rs:58:23 [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option { [INFO] [stdout] | ^^^^^ ^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `StackEntry` is never constructed [INFO] [stdout] --> src/dictionary.rs:129:8 [INFO] [stdout] | [INFO] [stdout] 129 | struct StackEntry<'a> { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `WordIterator` is never constructed [INFO] [stdout] --> src/dictionary.rs:134:12 [INFO] [stdout] | [INFO] [stdout] 134 | pub struct WordIterator<'a> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `next` are never used [INFO] [stdout] --> src/dictionary.rs:140:12 [INFO] [stdout] | [INFO] [stdout] 139 | impl<'a> WordIterator<'a> { [INFO] [stdout] | ------------------------- associated items in this implementation [INFO] [stdout] 140 | pub fn new(dictionary: &'a Dictionary) -> WordIterator<'a> { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 150 | pub fn next(&mut self) -> Option<&str> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `SolutionGrid` is never constructed [INFO] [stdout] --> src/grid.rs:29:12 [INFO] [stdout] | [INFO] [stdout] 29 | pub struct SolutionGrid { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `PuzzleSquareState` is never used [INFO] [stdout] --> src/grid.rs:37:10 [INFO] [stdout] | [INFO] [stdout] 37 | pub enum PuzzleSquareState { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `PuzzleSquare` is never constructed [INFO] [stdout] --> src/grid.rs:44:12 [INFO] [stdout] | [INFO] [stdout] 44 | pub struct PuzzleSquare { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `PuzzleGrid` is never constructed [INFO] [stdout] --> src/grid.rs:50:12 [INFO] [stdout] | [INFO] [stdout] 50 | pub struct PuzzleGrid { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Grid` is never constructed [INFO] [stdout] --> src/grid.rs:57:12 [INFO] [stdout] | [INFO] [stdout] 57 | pub struct Grid { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `GridParseError` is never used [INFO] [stdout] --> src/grid.rs:63:10 [INFO] [stdout] | [INFO] [stdout] 63 | pub enum GridParseError { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `is_gap_space` is never used [INFO] [stdout] --> src/grid.rs:71:8 [INFO] [stdout] | [INFO] [stdout] 71 | pub fn is_gap_space(x: i32, y: i32) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `is_gap_position` is never used [INFO] [stdout] --> src/grid.rs:75:8 [INFO] [stdout] | [INFO] [stdout] 75 | pub fn is_gap_position(position: usize) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/grid.rs:83:12 [INFO] [stdout] | [INFO] [stdout] 82 | impl SolutionGrid { [INFO] [stdout] | ----------------- associated function in this implementation [INFO] [stdout] 83 | pub fn new() -> SolutionGrid { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `reset`, and `is_solved` are never used [INFO] [stdout] --> src/grid.rs:91:12 [INFO] [stdout] | [INFO] [stdout] 90 | impl PuzzleGrid { [INFO] [stdout] | --------------- associated items in this implementation [INFO] [stdout] 91 | pub fn new() -> PuzzleGrid { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 106 | pub fn reset(&mut self) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 112 | pub fn is_solved(&self) -> bool { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `update_square_letters_for_word`, and `update_square_states` are never used [INFO] [stdout] --> src/grid.rs:120:12 [INFO] [stdout] | [INFO] [stdout] 119 | impl Grid { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 120 | pub fn new() -> Grid { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 127 | fn update_square_letters_for_word(&mut self, positions: I) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 170 | pub fn update_square_states(&mut self) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `WordPositions` is never constructed [INFO] [stdout] --> src/grid.rs:290:12 [INFO] [stdout] | [INFO] [stdout] 290 | pub struct WordPositions { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/grid.rs:295:12 [INFO] [stdout] | [INFO] [stdout] 294 | impl WordPositions { [INFO] [stdout] | ------------------ associated function in this implementation [INFO] [stdout] 295 | pub fn new() -> WordPositions { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `from_grid` is never used [INFO] [stdout] --> src/letter_grid.rs:151:12 [INFO] [stdout] | [INFO] [stdout] 150 | impl LetterGrid { [INFO] [stdout] | --------------- associated function in this implementation [INFO] [stdout] 151 | pub fn from_grid(grid: &grid::Grid) -> Result { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/dictionary.rs:58:23 [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option { [INFO] [stdout] | ^^^^^ ^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `StackEntry` is never constructed [INFO] [stdout] --> src/dictionary.rs:129:8 [INFO] [stdout] | [INFO] [stdout] 129 | struct StackEntry<'a> { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `WordIterator` is never constructed [INFO] [stdout] --> src/dictionary.rs:134:12 [INFO] [stdout] | [INFO] [stdout] 134 | pub struct WordIterator<'a> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `next` are never used [INFO] [stdout] --> src/dictionary.rs:140:12 [INFO] [stdout] | [INFO] [stdout] 139 | impl<'a> WordIterator<'a> { [INFO] [stdout] | ------------------------- associated items in this implementation [INFO] [stdout] 140 | pub fn new(dictionary: &'a Dictionary) -> WordIterator<'a> { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 150 | pub fn next(&mut self) -> Option<&str> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `is_solved` is never used [INFO] [stdout] --> src/grid.rs:112:12 [INFO] [stdout] | [INFO] [stdout] 90 | impl PuzzleGrid { [INFO] [stdout] | --------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 112 | pub fn is_solved(&self) -> bool { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/dictionary.rs:58:23 [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option { [INFO] [stdout] | ^^^^^ ^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `solve` is never used [INFO] [stdout] --> src/swap_solver.rs:171:8 [INFO] [stdout] | [INFO] [stdout] 171 | pub fn solve( [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `is_solved` is never used [INFO] [stdout] --> src/grid.rs:112:12 [INFO] [stdout] | [INFO] [stdout] 90 | impl PuzzleGrid { [INFO] [stdout] | --------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 112 | pub fn is_solved(&self) -> bool { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/dictionary.rs:58:23 [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option { [INFO] [stdout] | ^^^^^ ^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/dictionary.rs:58:23 [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option { [INFO] [stdout] | ^^^^^ ^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/word_counter.rs:78:19 [INFO] [stdout] | [INFO] [stdout] 78 | pub fn counts(&self, word: &str) -> WordCounts { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 78 | pub fn counts(&self, word: &str) -> WordCounts<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/dictionary.rs:58:23 [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option { [INFO] [stdout] | ^^^^^ ^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `solve` is never used [INFO] [stdout] --> src/swap_solver.rs:171:8 [INFO] [stdout] | [INFO] [stdout] 171 | pub fn solve( [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/dictionary.rs:58:23 [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option { [INFO] [stdout] | ^^^^^ ^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 58 | pub fn first_node(&self) -> Option> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/word_counter.rs:78:19 [INFO] [stdout] | [INFO] [stdout] 78 | pub fn counts(&self, word: &str) -> WordCounts { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 78 | pub fn counts(&self, word: &str) -> WordCounts<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 4m 57s [INFO] running `Command { std: "docker" "inspect" "9a2f40fe67d3728b2170111f0609696ceb724921e158185e193cac1181a6d16d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9a2f40fe67d3728b2170111f0609696ceb724921e158185e193cac1181a6d16d", kill_on_drop: false }` [INFO] [stdout] 9a2f40fe67d3728b2170111f0609696ceb724921e158185e193cac1181a6d16d