[INFO] cloning repository https://github.com/danielclarke/sat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danielclarke/sat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielclarke%2Fsat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielclarke%2Fsat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 20655d60f318a67ffa0c36cac0f82dc077d45b9c
[INFO] checking danielclarke/sat against master#fce0e74720d199eb7839fdb51af35ac5226da178 for pr-145262
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielclarke%2Fsat" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/danielclarke/sat
[INFO] finished tweaking git repo https://github.com/danielclarke/sat
[INFO] tweaked toml for git repo https://github.com/danielclarke/sat written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/danielclarke/sat on toolchain fce0e74720d199eb7839fdb51af35ac5226da178
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fce0e74720d199eb7839fdb51af35ac5226da178" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/danielclarke/sat 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" "+fce0e74720d199eb7839fdb51af35ac5226da178" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded minisat v0.4.4
[INFO] [stderr]   Downloaded bindgen v0.42.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+fce0e74720d199eb7839fdb51af35ac5226da178" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a6b949633d44f54a34c5ee6b0a1529417000fb13803995b16e09ab058bf24c10
[INFO] running `Command { std: "docker" "start" "-a" "a6b949633d44f54a34c5ee6b0a1529417000fb13803995b16e09ab058bf24c10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6b949633d44f54a34c5ee6b0a1529417000fb13803995b16e09ab058bf24c10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6b949633d44f54a34c5ee6b0a1529417000fb13803995b16e09ab058bf24c10", kill_on_drop: false }`
[INFO] [stdout] a6b949633d44f54a34c5ee6b0a1529417000fb13803995b16e09ab058bf24c10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+fce0e74720d199eb7839fdb51af35ac5226da178" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b5e6a89e343a448337a587922bec0d663b680b9e53a6f8bb0c7c992374e15d4b
[INFO] running `Command { std: "docker" "start" "-a" "b5e6a89e343a448337a587922bec0d663b680b9e53a6f8bb0c7c992374e15d4b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling memchr v2.7.1
[INFO] [stderr]    Compiling cc v1.0.90
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling unicode-width v0.1.11
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling log v0.4.21
[INFO] [stderr]    Compiling bindgen v0.42.3
[INFO] [stderr]    Compiling termcolor v1.4.1
[INFO] [stderr]    Compiling proc-macro2 v0.3.5
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]     Checking ryu v1.0.17
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling clang-sys v0.26.4
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling aho-corasick v1.1.2
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling syn v2.0.52
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v1.0.5
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling cexpr v0.3.6
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling regex v1.10.3
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]    Compiling minisat v0.4.4
[INFO] [stderr]     Checking sat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `festival_scheduler::Scheduler`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use festival_scheduler::Scheduler;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `utils::read_lines`
[INFO] [stdout]  --> src/festival_scheduler.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     utils::read_lines,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `festival_scheduler::Scheduler`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use festival_scheduler::Scheduler;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `utils::read_lines`
[INFO] [stdout]  --> src/festival_scheduler.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     utils::read_lines,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AdjacencySubList` is never constructed
[INFO] [stdout]  --> src/adjaceny_list.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct AdjacencySubList {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, `push`, and `clear` are never used
[INFO] [stdout]   --> src/adjaceny_list.rs:7:8
[INFO] [stdout]    |
[INFO] [stdout]  6 | impl AdjacencySubList {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout]  7 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 10 |     fn get(&self, index: usize) -> Option<usize> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn push(&mut self, value: usize) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn clear(&mut self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AdjacencyList` is never constructed
[INFO] [stdout]   --> src/adjaceny_list.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct AdjacencyList {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `reserve`, `clear`, `push`, and `get` are never used
[INFO] [stdout]   --> src/adjaceny_list.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl AdjacencyList {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 26 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn reserve(&mut self, capacity: usize) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     fn clear(&mut self, index: usize) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     fn push(&mut self, index: usize, value: usize) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn get(&self, index: usize, sub_index: usize) -> Option<usize> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `empty` is never used
[INFO] [stdout]   --> src/fixed_size_stack.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout]  6 | / impl<T> FixedSizeStack<T>
[INFO] [stdout]  7 | | where
[INFO] [stdout]  8 | |     T: Clone,
[INFO] [stdout]    | |_____________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 49 |       pub fn empty(&self) -> bool {
[INFO] [stdout]    |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete` is never used
[INFO] [stdout]   --> src/slot_map.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | / impl<T> SlotMap<T>
[INFO] [stdout] 25 | | where
[INFO] [stdout] 26 | |     T: Clone,
[INFO] [stdout]    | |_____________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 53 |       pub fn delete(&mut self, key: &SlotKey) {
[INFO] [stdout]    |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `DataError` is never used
[INFO] [stdout]   --> src/festival_scheduler.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum DataError {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Artist` is never constructed
[INFO] [stdout]   --> src/festival_scheduler.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Artist {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_artists` is never used
[INFO] [stdout]   --> src/festival_scheduler.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn load_artists<P>(path: P) -> Result<Vec<Artist>, Box<dyn error::Error>>
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Venue` is never constructed
[INFO] [stdout]   --> src/festival_scheduler.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub struct Venue {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VenueRecord` is never constructed
[INFO] [stdout]   --> src/festival_scheduler.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | struct VenueRecord {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_venues` is never used
[INFO] [stdout]   --> src/festival_scheduler.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub fn load_venues<P>(path: P) -> Result<Vec<Venue>, Box<dyn error::Error>>
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Event` is never constructed
[INFO] [stdout]   --> src/festival_scheduler.rs:98:12
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub struct Event {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EventRecord` is never constructed
[INFO] [stdout]    --> src/festival_scheduler.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | struct EventRecord {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_events` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 113 | pub fn load_events<P>(path: P) -> Result<Vec<Event>, Box<dyn error::Error>>
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EventRep` is never constructed
[INFO] [stdout]    --> src/festival_scheduler.rs:150:8
[INFO] [stdout]     |
[INFO] [stdout] 150 | struct EventRep {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:157:8
[INFO] [stdout]     |
[INFO] [stdout] 156 | impl EventRep {
[INFO] [stdout]     | ------------- associated function in this implementation
[INFO] [stdout] 157 |     fn new(id: usize, artists: Vec<usize>, duration: usize) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Interval` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:166:6
[INFO] [stdout]     |
[INFO] [stdout] 166 | type Interval = usize;
[INFO] [stdout]     |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ArtistIndex` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:167:6
[INFO] [stdout]     |
[INFO] [stdout] 167 | type ArtistIndex = usize;
[INFO] [stdout]     |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `VenueIndex` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:168:6
[INFO] [stdout]     |
[INFO] [stdout] 168 | type VenueIndex = usize;
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ArtistVariableIndex` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:169:6
[INFO] [stdout]     |
[INFO] [stdout] 169 | type ArtistVariableIndex = (Interval, VenueIndex, ArtistIndex);
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `EventVariableIndex` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:170:6
[INFO] [stdout]     |
[INFO] [stdout] 170 | type EventVariableIndex = (Interval, VenueIndex, usize);
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Scheduler` is never constructed
[INFO] [stdout]    --> src/festival_scheduler.rs:172:12
[INFO] [stdout]     |
[INFO] [stdout] 172 | pub struct Scheduler {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/festival_scheduler.rs:185:12
[INFO] [stdout]     |
[INFO] [stdout] 184 | impl Scheduler {
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout] 185 |     pub fn new(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 233 |     fn add_artist_var(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 246 |     fn add_event_var(&mut self, interval: usize, venue: VenueIndex, event: usize) -> Variable {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 254 |     fn artist_var(&mut self, interval: usize, venue: VenueIndex, artist: ArtistIndex) -> Variable {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 259 |     fn event_var(&mut self, interval: usize, venue: VenueIndex, event: usize) -> Variable {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 264 |     fn add_artist(&mut self, artist: ArtistIndex) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 272 |     fn add_event(&mut self, event: usize) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 281 |     fn event_must_run(&mut self, event: usize) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 291 |     fn one_event_per_venue_interval(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 302 |     fn artists_attend_events(&mut self, event: usize) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 315 |     fn artist_one_place_at_a_time(&mut self, artist: ArtistIndex) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 325 |     pub fn solve(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 388 |     fn exactly_one(&mut self, variables: Vec<Variable>) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 399 |     fn zero_or_one(&mut self, variables: Vec<Variable>) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add` and `union` are never used
[INFO] [stdout]    --> src/solver.rs:112:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | impl Clause {
[INFO] [stdout]     | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 112 |     fn add(&mut self, literal: Literal) {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |     fn union(&mut self, clause: Clause) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `resolve` is never used
[INFO] [stdout]    --> src/solver.rs:183:4
[INFO] [stdout]     |
[INFO] [stdout] 183 | fn resolve(a: &Clause, b: &Clause) -> Option<Clause> {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_most_recent_decision_assignment`, `decision_level_count`, and `conflict_analysis_last_uip` are never used
[INFO] [stdout]    --> src/solver.rs:601:8
[INFO] [stdout]     |
[INFO] [stdout] 288 | impl Solver {
[INFO] [stdout]     | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 601 |     fn get_most_recent_decision_assignment(&self) -> Option<VariableAssignment> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 616 |     fn decision_level_count(&self, clause: &Clause, decision_level: DecisionLevel) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 624 |     fn conflict_analysis_last_uip(&mut self, clause_index: ClauseIndex) -> Clause {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SolutionError` is never used
[INFO] [stdout]    --> src/solver.rs:972:10
[INFO] [stdout]     |
[INFO] [stdout] 972 | pub enum SolutionError {
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/fixed_size_stack.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn iter(&self) -> StackIterator<T> {
[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] 53 |     pub fn iter(&self) -> StackIterator<'_, T> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/slot_map.rs:92:17
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn iter(&self) -> SlotMapIterator<T> {
[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] 92 |     pub fn iter(&self) -> SlotMapIterator<'_, T> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/solver.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout] 134 |     fn iter(&self) -> ClauseIterator {
[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] 134 |     fn iter(&self) -> ClauseIterator<'_> {
[INFO] [stdout]     |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c5`
[INFO] [stdout]     --> src/solver.rs:1003:13
[INFO] [stdout]      |
[INFO] [stdout] 1003 |         let c5 = vec![v3.literal()];
[INFO] [stdout]      |             ^^ help: if this is intentional, prefix it with an underscore: `_c5`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sk1`
[INFO] [stdout]     --> src/solver.rs:1005:13
[INFO] [stdout]      |
[INFO] [stdout] 1005 |         let sk1 = formula.add_clause(c1);
[INFO] [stdout]      |             ^^^ help: if this is intentional, prefix it with an underscore: `_sk1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sk2`
[INFO] [stdout]     --> src/solver.rs:1006:13
[INFO] [stdout]      |
[INFO] [stdout] 1006 |         let sk2 = formula.add_clause(c2);
[INFO] [stdout]      |             ^^^ help: if this is intentional, prefix it with an underscore: `_sk2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sk3`
[INFO] [stdout]     --> src/solver.rs:1007:13
[INFO] [stdout]      |
[INFO] [stdout] 1007 |         let sk3 = formula.add_clause(c3);
[INFO] [stdout]      |             ^^^ help: if this is intentional, prefix it with an underscore: `_sk3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sk4`
[INFO] [stdout]     --> src/solver.rs:1008:13
[INFO] [stdout]      |
[INFO] [stdout] 1008 |         let sk4 = formula.add_clause(c4);
[INFO] [stdout]      |             ^^^ help: if this is intentional, prefix it with an underscore: `_sk4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sk1`
[INFO] [stdout]     --> src/solver.rs:1198:13
[INFO] [stdout]      |
[INFO] [stdout] 1198 |         let sk1 = formula.add_clause(c1);
[INFO] [stdout]      |             ^^^ help: if this is intentional, prefix it with an underscore: `_sk1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sk2`
[INFO] [stdout]     --> src/solver.rs:1199:13
[INFO] [stdout]      |
[INFO] [stdout] 1199 |         let sk2 = formula.add_clause(c2);
[INFO] [stdout]      |             ^^^ help: if this is intentional, prefix it with an underscore: `_sk2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sk3`
[INFO] [stdout]     --> src/solver.rs:1200:13
[INFO] [stdout]      |
[INFO] [stdout] 1200 |         let sk3 = formula.add_clause(c3);
[INFO] [stdout]      |             ^^^ help: if this is intentional, prefix it with an underscore: `_sk3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sk1`
[INFO] [stdout]     --> src/solver.rs:1226:13
[INFO] [stdout]      |
[INFO] [stdout] 1226 |         let sk1 = formula.add_clause(c1);
[INFO] [stdout]      |             ^^^ help: if this is intentional, prefix it with an underscore: `_sk1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sk2`
[INFO] [stdout]     --> src/solver.rs:1227:13
[INFO] [stdout]      |
[INFO] [stdout] 1227 |         let sk2 = formula.add_clause(c2);
[INFO] [stdout]      |             ^^^ help: if this is intentional, prefix it with an underscore: `_sk2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sk4`
[INFO] [stdout]     --> src/solver.rs:1654:13
[INFO] [stdout]      |
[INFO] [stdout] 1654 |         let sk4 = formula.add_clause(c4);
[INFO] [stdout]      |             ^^^ help: if this is intentional, prefix it with an underscore: `_sk4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sk5`
[INFO] [stdout]     --> src/solver.rs:1655:13
[INFO] [stdout]      |
[INFO] [stdout] 1655 |         let sk5 = formula.add_clause(c5);
[INFO] [stdout]      |             ^^^ help: if this is intentional, prefix it with an underscore: `_sk5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AdjacencySubList` is never constructed
[INFO] [stdout]  --> src/adjaceny_list.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct AdjacencySubList {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, `push`, and `clear` are never used
[INFO] [stdout]   --> src/adjaceny_list.rs:7:8
[INFO] [stdout]    |
[INFO] [stdout]  6 | impl AdjacencySubList {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout]  7 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 10 |     fn get(&self, index: usize) -> Option<usize> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn push(&mut self, value: usize) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn clear(&mut self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AdjacencyList` is never constructed
[INFO] [stdout]   --> src/adjaceny_list.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct AdjacencyList {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `reserve`, `clear`, `push`, and `get` are never used
[INFO] [stdout]   --> src/adjaceny_list.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl AdjacencyList {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 26 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn reserve(&mut self, capacity: usize) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     fn clear(&mut self, index: usize) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     fn push(&mut self, index: usize, value: usize) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn get(&self, index: usize, sub_index: usize) -> Option<usize> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `DataError` is never used
[INFO] [stdout]   --> src/festival_scheduler.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum DataError {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Artist` is never constructed
[INFO] [stdout]   --> src/festival_scheduler.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Artist {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_artists` is never used
[INFO] [stdout]   --> src/festival_scheduler.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn load_artists<P>(path: P) -> Result<Vec<Artist>, Box<dyn error::Error>>
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Venue` is never constructed
[INFO] [stdout]   --> src/festival_scheduler.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub struct Venue {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VenueRecord` is never constructed
[INFO] [stdout]   --> src/festival_scheduler.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | struct VenueRecord {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_venues` is never used
[INFO] [stdout]   --> src/festival_scheduler.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub fn load_venues<P>(path: P) -> Result<Vec<Venue>, Box<dyn error::Error>>
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Event` is never constructed
[INFO] [stdout]   --> src/festival_scheduler.rs:98:12
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub struct Event {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EventRecord` is never constructed
[INFO] [stdout]    --> src/festival_scheduler.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | struct EventRecord {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_events` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 113 | pub fn load_events<P>(path: P) -> Result<Vec<Event>, Box<dyn error::Error>>
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EventRep` is never constructed
[INFO] [stdout]    --> src/festival_scheduler.rs:150:8
[INFO] [stdout]     |
[INFO] [stdout] 150 | struct EventRep {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:157:8
[INFO] [stdout]     |
[INFO] [stdout] 156 | impl EventRep {
[INFO] [stdout]     | ------------- associated function in this implementation
[INFO] [stdout] 157 |     fn new(id: usize, artists: Vec<usize>, duration: usize) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Interval` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:166:6
[INFO] [stdout]     |
[INFO] [stdout] 166 | type Interval = usize;
[INFO] [stdout]     |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ArtistIndex` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:167:6
[INFO] [stdout]     |
[INFO] [stdout] 167 | type ArtistIndex = usize;
[INFO] [stdout]     |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `VenueIndex` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:168:6
[INFO] [stdout]     |
[INFO] [stdout] 168 | type VenueIndex = usize;
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ArtistVariableIndex` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:169:6
[INFO] [stdout]     |
[INFO] [stdout] 169 | type ArtistVariableIndex = (Interval, VenueIndex, ArtistIndex);
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `EventVariableIndex` is never used
[INFO] [stdout]    --> src/festival_scheduler.rs:170:6
[INFO] [stdout]     |
[INFO] [stdout] 170 | type EventVariableIndex = (Interval, VenueIndex, usize);
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Scheduler` is never constructed
[INFO] [stdout]    --> src/festival_scheduler.rs:172:12
[INFO] [stdout]     |
[INFO] [stdout] 172 | pub struct Scheduler {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/festival_scheduler.rs:185:12
[INFO] [stdout]     |
[INFO] [stdout] 184 | impl Scheduler {
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout] 185 |     pub fn new(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 233 |     fn add_artist_var(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 246 |     fn add_event_var(&mut self, interval: usize, venue: VenueIndex, event: usize) -> Variable {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 254 |     fn artist_var(&mut self, interval: usize, venue: VenueIndex, artist: ArtistIndex) -> Variable {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 259 |     fn event_var(&mut self, interval: usize, venue: VenueIndex, event: usize) -> Variable {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 264 |     fn add_artist(&mut self, artist: ArtistIndex) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 272 |     fn add_event(&mut self, event: usize) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 281 |     fn event_must_run(&mut self, event: usize) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 291 |     fn one_event_per_venue_interval(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 302 |     fn artists_attend_events(&mut self, event: usize) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 315 |     fn artist_one_place_at_a_time(&mut self, artist: ArtistIndex) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 325 |     pub fn solve(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 388 |     fn exactly_one(&mut self, variables: Vec<Variable>) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 399 |     fn zero_or_one(&mut self, variables: Vec<Variable>) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add` and `union` are never used
[INFO] [stdout]    --> src/solver.rs:112:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | impl Clause {
[INFO] [stdout]     | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 112 |     fn add(&mut self, literal: Literal) {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |     fn union(&mut self, clause: Clause) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `decision_level_count` is never used
[INFO] [stdout]    --> src/solver.rs:616:8
[INFO] [stdout]     |
[INFO] [stdout] 288 | impl Solver {
[INFO] [stdout]     | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 616 |     fn decision_level_count(&self, clause: &Clause, decision_level: DecisionLevel) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/fixed_size_stack.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn iter(&self) -> StackIterator<T> {
[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] 53 |     pub fn iter(&self) -> StackIterator<'_, T> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/slot_map.rs:92:17
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn iter(&self) -> SlotMapIterator<T> {
[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] 92 |     pub fn iter(&self) -> SlotMapIterator<'_, T> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/solver.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout] 134 |     fn iter(&self) -> ClauseIterator {
[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] 134 |     fn iter(&self) -> ClauseIterator<'_> {
[INFO] [stdout]     |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.72s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: cexpr v0.3.6, nom v4.2.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "b5e6a89e343a448337a587922bec0d663b680b9e53a6f8bb0c7c992374e15d4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5e6a89e343a448337a587922bec0d663b680b9e53a6f8bb0c7c992374e15d4b", kill_on_drop: false }`
[INFO] [stdout] b5e6a89e343a448337a587922bec0d663b680b9e53a6f8bb0c7c992374e15d4b
