[INFO] cloning repository https://github.com/luhanzhen/RuCos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/luhanzhen/RuCos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluhanzhen%2FRuCos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluhanzhen%2FRuCos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5792d04ec6f1a0659c63ec0fd232e6636c47115c
[INFO] checking luhanzhen/RuCos against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluhanzhen%2FRuCos" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/luhanzhen/RuCos
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/luhanzhen/RuCos
[INFO] tweaked toml for git repo https://github.com/luhanzhen/RuCos written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/luhanzhen/RuCos on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/luhanzhen/RuCos 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0dfda6388ef5601bd8fef27bb61bbaa54585c8b5aa268f7f57681d75e93d66b1
[INFO] running `Command { std: "docker" "start" "-a" "0dfda6388ef5601bd8fef27bb61bbaa54585c8b5aa268f7f57681d75e93d66b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0dfda6388ef5601bd8fef27bb61bbaa54585c8b5aa268f7f57681d75e93d66b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dfda6388ef5601bd8fef27bb61bbaa54585c8b5aa268f7f57681d75e93d66b1", kill_on_drop: false }`
[INFO] [stdout] 0dfda6388ef5601bd8fef27bb61bbaa54585c8b5aa268f7f57681d75e93d66b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e68b4ccafdaa8b52e0ce19fa5aec288fd0b453dbc33a5916a7cc82da80ff3173
[INFO] running `Command { std: "docker" "start" "-a" "e68b4ccafdaa8b52e0ce19fa5aec288fd0b453dbc33a5916a7cc82da80ff3173", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]     Checking smallvec v1.11.2
[INFO] [stderr]    Compiling rustversion v1.0.14
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking strum v0.25.0
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking parking_lot_core v0.9.9
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking crossterm v0.27.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling strum_macros v0.25.3
[INFO] [stderr]     Checking comfy-table v7.1.0
[INFO] [stderr]     Checking rucos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Formatter`
[INFO] [stdout]  --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:6:23
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::fmt::{Debug, Formatter};
[INFO] [stdout]   |                       ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Formatter`
[INFO] [stdout]  --> src/solve/heuristics/variable/variable_random.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fmt::{Debug, Formatter};
[INFO] [stdout]   |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Formatter`
[INFO] [stdout]  --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:6:23
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::fmt::{Debug, Formatter};
[INFO] [stdout]   |                       ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Formatter`
[INFO] [stdout]  --> src/solve/heuristics/variable/variable_random.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fmt::{Debug, Formatter};
[INFO] [stdout]   |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `var`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:27:41
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn new_decision_callback(&mut self, var: &Var, solver: &InnerSolver) {
[INFO] [stdout]    |                                         ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solver`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:27:52
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn new_decision_callback(&mut self, var: &Var, solver: &InnerSolver) {
[INFO] [stdout]    |                                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `var`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:37:44
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value_idx`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:37:55
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                                       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_value_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solver`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:37:73
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                                                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solver`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:51:39
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn select_variable<'a>(&mut self, solver: &'a InnerSolver) -> &'a Var {
[INFO] [stdout]    |                                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `var`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:29:41
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn new_decision_callback(&mut self, var: &Var, solver: &InnerSolver) {
[INFO] [stdout]    |                                         ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solver`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:29:52
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn new_decision_callback(&mut self, var: &Var, solver: &InnerSolver) {
[INFO] [stdout]    |                                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `var`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:35:44
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value_idx`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:35:55
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                                       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_value_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solver`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:35:73
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                                                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `random`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let random = random::<usize>() % len;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_random`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `borrow`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let borrow = solver.borrow();
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_borrow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless assignment of field of type `usize` to itself
[INFO] [stdout]    --> src/utils/bit_set.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |             self.max_size = self.max_size
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless assignment of field of type `usize` to itself
[INFO] [stdout]    --> src/utils/bit_set.rs:135:13
[INFO] [stdout]     |
[INFO] [stdout] 135 |             self.max_size = self.max_size
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless assignment of field of type `usize` to itself
[INFO] [stdout]   --> src/utils/bit_set.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |             self.max_size = self.max_size
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `SparseSetOfReferenceIter` is never constructed
[INFO] [stdout]    --> src/utils/sparse_set_of_reference.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 137 | pub struct SparseSetOfReferenceIter<'a, T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]     = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `GacRegin` is never constructed
[INFO] [stdout]   --> src/constraint/comparison/all_different/gent.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct GacRegin {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `GacRegin` is never constructed
[INFO] [stdout]   --> src/constraint/comparison/all_different/regin.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct GacRegin {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `GacZhen` is never constructed
[INFO] [stdout]   --> src/constraint/comparison/all_different/zhen.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct GacZhen {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_satisfied`, `get_name`, `restore_to_level`, and `get_type` are never used
[INFO] [stdout]   --> src/constraint/constraint.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub(crate) trait ConstraintTrait: Display + Debug {
[INFO] [stdout]    |                  --------------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 82 |     fn is_satisfied(&self) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 83 |
[INFO] [stdout] 84 |     fn get_name(&self) -> &str;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 85 |
[INFO] [stdout] 86 |     fn restore_to_level(&mut self, level: usize);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 90 |     fn get_type(&self) -> &XConstraintType;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `initialise`, `filter_by_variable`, `filter_by_arc`, `is_coarse_grained`, `is_fine_grained`, and `restore_to_level` are never used
[INFO] [stdout]   --> src/constraint/propagator.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub(crate) trait PropagatorTrait: Debug {
[INFO] [stdout]    |                  --------------- methods in this trait
[INFO] [stdout] 21 |     fn initialise(&mut self);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 22 |     fn filter_by_variable(&mut self, dummy: &Var) -> Result<usize, &Box<dyn ExceptionTrait>>;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 23 |     fn filter_by_arc(
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn is_coarse_grained(&self) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 29 |     fn is_fine_grained(&self) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 30 |     fn restore_to_level(&mut self, level: usize);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `select_variable` is never used
[INFO] [stdout]   --> src/solve/heuristics/variable/heuristic_variable_trait.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub trait HeuristicVariableTrait: Debug + NewDecision + DeleteDecision {
[INFO] [stdout]    |           ---------------------- method in this trait
[INFO] [stdout] 23 |     fn select_variable<'a>(&mut self, solver: &'a InnerSolver) -> &'a Var;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `select_value` is never used
[INFO] [stdout]   --> src/solve/heuristics/value/heuristic_value_trait.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub trait HeuristicValueTrait: Debug {
[INFO] [stdout]    |           ------------------- method in this trait
[INFO] [stdout] 20 |     fn select_value(&mut self, var: &Var) -> i32;
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `should_restart` and `initialize` are never used
[INFO] [stdout]   --> src/solve/restart/restart_trait.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub trait RestartTrait: Debug {
[INFO] [stdout]    |           ------------ methods in this trait
[INFO] [stdout] 20 |     fn should_restart(&mut self, solver: &InnerSolver) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 21 |
[INFO] [stdout] 22 |     fn initialize(&mut self, solver: &InnerSolver);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `full_backtrack` and `is_implemented` are never used
[INFO] [stdout]   --> src/solve/callbacks/delete_decision.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait DeleteDecision: Debug {
[INFO] [stdout]    |           -------------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn full_backtrack(&mut self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 24 |
[INFO] [stdout] 25 |     fn is_implemented(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_implemented` is never used
[INFO] [stdout]   --> src/solve/callbacks/domain_reduction.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait DomainReduction: Debug {
[INFO] [stdout]    |           --------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn is_implemented(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_implemented` is never used
[INFO] [stdout]   --> src/solve/callbacks/new_decision.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait NewDecision: Debug {
[INFO] [stdout]    |           ----------- method in this trait
[INFO] [stdout] 21 |     fn new_decision_callback(&mut self, var: &Var, solver: &InnerSolver);
[INFO] [stdout] 22 |     fn is_implemented(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_implemented` is never used
[INFO] [stdout]   --> src/solve/callbacks/non_consistency.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub trait NonConsistency: Debug {
[INFO] [stdout]    |           -------------- method in this trait
[INFO] [stdout] 22 |     fn non_consistency_callback(&mut self, cons: &Constraint, level: usize, solver: &InnerSolver);
[INFO] [stdout] 23 |     fn is_implemented(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/utils/bit_set.rs:194:17
[INFO] [stdout]     |
[INFO] [stdout] 194 |     pub fn iter(&self) -> BitSetIter {
[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] 194 |     pub fn iter(&self) -> BitSetIter<'_> {
[INFO] [stdout]     |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/utils/linked_set.rs:204:17
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub fn iter(&self) -> LinkedSetIter {
[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] 204 |     pub fn iter(&self) -> LinkedSetIter<'_> {
[INFO] [stdout]     |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/spare_set.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |     pub fn iter(&self) -> SpareSetIter {
[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] 88 |     pub fn iter(&self) -> SpareSetIter<'_> {
[INFO] [stdout]    |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/spare_set_of_multi_level.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn iter(&self) -> SpareSetIter {
[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] 29 |     pub fn iter(&self) -> SpareSetIter<'_> {
[INFO] [stdout]    |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/spare_set_with_counter.rs:83:17
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn iter(&self) -> SpareSetIter {
[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] 83 |     pub fn iter(&self) -> SpareSetIter<'_> {
[INFO] [stdout]    |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/variable/domain/domain_trait.rs:197:13
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn iter(&self) -> LinkedSetIter {
[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] 197 |     fn iter(&self) -> LinkedSetIter<'_> {
[INFO] [stdout]     |                                    ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `var`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:27:41
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn new_decision_callback(&mut self, var: &Var, solver: &InnerSolver) {
[INFO] [stdout]    |                                         ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solver`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:27:52
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn new_decision_callback(&mut self, var: &Var, solver: &InnerSolver) {
[INFO] [stdout]    |                                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `var`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:37:44
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value_idx`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:37:55
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                                       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_value_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solver`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:37:73
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                                                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solver`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_dom_over_ddeg.rs:51:39
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn select_variable<'a>(&mut self, solver: &'a InnerSolver) -> &'a Var {
[INFO] [stdout]    |                                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `var`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:29:41
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn new_decision_callback(&mut self, var: &Var, solver: &InnerSolver) {
[INFO] [stdout]    |                                         ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solver`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:29:52
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn new_decision_callback(&mut self, var: &Var, solver: &InnerSolver) {
[INFO] [stdout]    |                                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `var`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:35:44
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value_idx`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:35:55
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                                       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_value_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solver`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:35:73
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn delete_decision_callback(&mut self, var: &Var, value_idx: usize, solver: &InnerSolver) {
[INFO] [stdout]    |                                                                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `random`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let random = random::<usize>() % len;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_random`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `borrow`
[INFO] [stdout]   --> src/solve/heuristics/variable/variable_random.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let borrow = solver.borrow();
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_borrow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rucos` (lib) due to 4 previous errors; 33 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: useless assignment of field of type `usize` to itself
[INFO] [stdout]    --> src/utils/bit_set.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |             self.max_size = self.max_size
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless assignment of field of type `usize` to itself
[INFO] [stdout]    --> src/utils/bit_set.rs:135:13
[INFO] [stdout]     |
[INFO] [stdout] 135 |             self.max_size = self.max_size
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless assignment of field of type `usize` to itself
[INFO] [stdout]   --> src/utils/bit_set.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |             self.max_size = self.max_size
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `SparseSetOfReferenceIter` is never constructed
[INFO] [stdout]    --> src/utils/sparse_set_of_reference.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 137 | pub struct SparseSetOfReferenceIter<'a, T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]     = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `GacRegin` is never constructed
[INFO] [stdout]   --> src/constraint/comparison/all_different/gent.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct GacRegin {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `GacRegin` is never constructed
[INFO] [stdout]   --> src/constraint/comparison/all_different/regin.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct GacRegin {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `GacZhen` is never constructed
[INFO] [stdout]   --> src/constraint/comparison/all_different/zhen.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct GacZhen {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_satisfied`, `get_name`, `restore_to_level`, and `get_type` are never used
[INFO] [stdout]   --> src/constraint/constraint.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub(crate) trait ConstraintTrait: Display + Debug {
[INFO] [stdout]    |                  --------------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 82 |     fn is_satisfied(&self) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 83 |
[INFO] [stdout] 84 |     fn get_name(&self) -> &str;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 85 |
[INFO] [stdout] 86 |     fn restore_to_level(&mut self, level: usize);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 90 |     fn get_type(&self) -> &XConstraintType;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `initialise`, `filter_by_variable`, `filter_by_arc`, `is_coarse_grained`, `is_fine_grained`, and `restore_to_level` are never used
[INFO] [stdout]   --> src/constraint/propagator.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub(crate) trait PropagatorTrait: Debug {
[INFO] [stdout]    |                  --------------- methods in this trait
[INFO] [stdout] 21 |     fn initialise(&mut self);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 22 |     fn filter_by_variable(&mut self, dummy: &Var) -> Result<usize, &Box<dyn ExceptionTrait>>;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 23 |     fn filter_by_arc(
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn is_coarse_grained(&self) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 29 |     fn is_fine_grained(&self) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 30 |     fn restore_to_level(&mut self, level: usize);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `select_variable` is never used
[INFO] [stdout]   --> src/solve/heuristics/variable/heuristic_variable_trait.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub trait HeuristicVariableTrait: Debug + NewDecision + DeleteDecision {
[INFO] [stdout]    |           ---------------------- method in this trait
[INFO] [stdout] 23 |     fn select_variable<'a>(&mut self, solver: &'a InnerSolver) -> &'a Var;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `select_value` is never used
[INFO] [stdout]   --> src/solve/heuristics/value/heuristic_value_trait.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub trait HeuristicValueTrait: Debug {
[INFO] [stdout]    |           ------------------- method in this trait
[INFO] [stdout] 20 |     fn select_value(&mut self, var: &Var) -> i32;
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `should_restart` and `initialize` are never used
[INFO] [stdout]   --> src/solve/restart/restart_trait.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub trait RestartTrait: Debug {
[INFO] [stdout]    |           ------------ methods in this trait
[INFO] [stdout] 20 |     fn should_restart(&mut self, solver: &InnerSolver) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 21 |
[INFO] [stdout] 22 |     fn initialize(&mut self, solver: &InnerSolver);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `full_backtrack` and `is_implemented` are never used
[INFO] [stdout]   --> src/solve/callbacks/delete_decision.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait DeleteDecision: Debug {
[INFO] [stdout]    |           -------------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn full_backtrack(&mut self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 24 |
[INFO] [stdout] 25 |     fn is_implemented(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_implemented` is never used
[INFO] [stdout]   --> src/solve/callbacks/domain_reduction.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait DomainReduction: Debug {
[INFO] [stdout]    |           --------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn is_implemented(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_implemented` is never used
[INFO] [stdout]   --> src/solve/callbacks/new_decision.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait NewDecision: Debug {
[INFO] [stdout]    |           ----------- method in this trait
[INFO] [stdout] 21 |     fn new_decision_callback(&mut self, var: &Var, solver: &InnerSolver);
[INFO] [stdout] 22 |     fn is_implemented(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_implemented` is never used
[INFO] [stdout]   --> src/solve/callbacks/non_consistency.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub trait NonConsistency: Debug {
[INFO] [stdout]    |           -------------- method in this trait
[INFO] [stdout] 22 |     fn non_consistency_callback(&mut self, cons: &Constraint, level: usize, solver: &InnerSolver);
[INFO] [stdout] 23 |     fn is_implemented(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/utils/bit_set.rs:194:17
[INFO] [stdout]     |
[INFO] [stdout] 194 |     pub fn iter(&self) -> BitSetIter {
[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] 194 |     pub fn iter(&self) -> BitSetIter<'_> {
[INFO] [stdout]     |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/utils/linked_set.rs:204:17
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub fn iter(&self) -> LinkedSetIter {
[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] 204 |     pub fn iter(&self) -> LinkedSetIter<'_> {
[INFO] [stdout]     |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/spare_set.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |     pub fn iter(&self) -> SpareSetIter {
[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] 88 |     pub fn iter(&self) -> SpareSetIter<'_> {
[INFO] [stdout]    |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/spare_set_of_multi_level.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn iter(&self) -> SpareSetIter {
[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] 29 |     pub fn iter(&self) -> SpareSetIter<'_> {
[INFO] [stdout]    |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/spare_set_with_counter.rs:83:17
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn iter(&self) -> SpareSetIter {
[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] 83 |     pub fn iter(&self) -> SpareSetIter<'_> {
[INFO] [stdout]    |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/variable/domain/domain_trait.rs:197:13
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn iter(&self) -> LinkedSetIter {
[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] 197 |     fn iter(&self) -> LinkedSetIter<'_> {
[INFO] [stdout]     |                                    ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rucos` (lib test) due to 4 previous errors; 33 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "e68b4ccafdaa8b52e0ce19fa5aec288fd0b453dbc33a5916a7cc82da80ff3173", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e68b4ccafdaa8b52e0ce19fa5aec288fd0b453dbc33a5916a7cc82da80ff3173", kill_on_drop: false }`
[INFO] [stdout] e68b4ccafdaa8b52e0ce19fa5aec288fd0b453dbc33a5916a7cc82da80ff3173
