[INFO] fetching crate puzzle-solver 0.4.1...
[INFO] testing puzzle-solver-0.4.1 against 1.100.0-beta.1 for beta-1.100-2
[INFO] extracting crate puzzle-solver 0.4.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate puzzle-solver 0.4.1
[INFO] finished tweaking crates.io crate puzzle-solver 0.4.1
[INFO] tweaked toml for crates.io crate puzzle-solver 0.4.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate puzzle-solver 0.4.1 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to highest compatible versions
[INFO] [stderr]       Adding bit-set v0.4.0 (available: v0.11.1)
[INFO] [stderr]       Adding num-rational v0.1.43 (available: v0.4.2)
[INFO] [stderr]       Adding num-traits v0.1.43 (available: v0.2.19)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.repository`
[INFO] [stderr]   --> Cargo.toml:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 | homepage = "https://github.com/wangds/puzzle-solver.git"
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 | repository = "https://github.com/wangds/puzzle-solver.git"
[INFO] [stderr]    |              ---------------------------------------------
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `puzzle-solver` (manifest) generated 2 warnings
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790
[INFO] running `Command { std: "docker" "start" "fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.repository`
[INFO] [stderr]   --> Cargo.toml:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 | homepage = "https://github.com/wangds/puzzle-solver.git"
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 | repository = "https://github.com/wangds/puzzle-solver.git"
[INFO] [stderr]    |              ---------------------------------------------
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `puzzle-solver` (manifest) generated 2 warnings
[INFO] [stderr]    Compiling autocfg v1.5.1
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling bit-set v0.4.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling num-rational v0.1.43
[INFO] [stderr]    Compiling num-integer v0.1.47
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling puzzle-solver v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/alldifferent.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             try!(search.remove_candidate(var2, val));
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/alldifferent.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |                     try!(search.set_candidate(var, val));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/equality.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 63 |                 try!(search.set_candidate(var, val.to_integer()));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/equality.rs:81:38
[INFO] [stdout]    |
[INFO] [stdout] 81 |             let (min_val, max_val) = try!(search.get_min_max(var));
[INFO] [stdout]    |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/constraint/equality.rs:107:38
[INFO] [stdout]     |
[INFO] [stdout] 107 |             let (min_val, max_val) = try!(search.get_min_max(var));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/constraint/equality.rs:120:23
[INFO] [stdout]     |
[INFO] [stdout] 120 |                     = try!(search.bound_candidate_range(var, min_bnd, max_bnd));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:470:22
[INFO] [stdout]     |
[INFO] [stdout] 470 |             let rc = try!(self.constraints[cidx].substitute(from, to));
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:734:17
[INFO] [stdout]     |
[INFO] [stdout] 734 |                 try!(constraint.on_assigned(self, var, val));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:764:21
[INFO] [stdout]     |
[INFO] [stdout] 764 |                     try!(self.assign(idx, val));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:778:21
[INFO] [stdout]     |
[INFO] [stdout] 778 |                     try!(constraint.on_updated(self));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:819:31
[INFO] [stdout]     |
[INFO] [stdout] 819 |         let new_constraints = try!(self.constraints.substitute(from, to));
[INFO] [stdout]     |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:826:13
[INFO] [stdout]     |
[INFO] [stdout] 826 |             try!(self.set_candidate(to, val));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::usize::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/puzzle.rs:422:40
[INFO] [stdout]     |
[INFO] [stdout] 422 |             search.solve(::std::usize::MAX, &mut solutions);
[INFO] [stdout]     |                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::usize::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/puzzle.rs:693:40
[INFO] [stdout]     |
[INFO] [stdout] 693 |                     _ => ::std::usize::MAX,
[INFO] [stdout]     |                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/puzzle.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 |     constraints: Vec<Rc<Constraint>>,
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 43 |     constraints: Vec<Rc<dyn Constraint>>,
[INFO] [stdout]    |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/puzzle.rs:50:25
[INFO] [stdout]    |
[INFO] [stdout] 50 |     constraints: Vec<Rc<Constraint>>,
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 |     constraints: Vec<Rc<dyn Constraint>>,
[INFO] [stdout]    |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/alldifferent.rs:33:34
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/mod.rs:15:34
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a>;
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a>;
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/alldifferent.rs:79:28
[INFO] [stdout]    |
[INFO] [stdout] 79 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 79 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/mod.rs:33:28
[INFO] [stdout]    |
[INFO] [stdout] 33 |             -> PsResult<Rc<Constraint>>;
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 |             -> PsResult<Rc<dyn Constraint>>;
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/equality.rs:35:34
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/constraint/equality.rs:138:28
[INFO] [stdout]     |
[INFO] [stdout] 138 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 138 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/unify.rs:36:34
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/unify.rs:53:28
[INFO] [stdout]    |
[INFO] [stdout] 53 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 53 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/puzzle.rs:542:20
[INFO] [stdout]     |
[INFO] [stdout] 542 |             -> Box<Iterator<Item=Val> + 'a> {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 542 |             -> Box<dyn Iterator<Item=Val> + 'a> {
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/puzzle.rs:81:34
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn iter<'a>(&'a self) -> Box<Iterator<Item=Val> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn iter<'a>(&'a self) -> Box<dyn Iterator<Item=Val> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/puzzle.rs:482:39
[INFO] [stdout]     |
[INFO] [stdout] 482 |     fn init_wake(constraints: &Vec<Rc<Constraint>>, num_vars: usize)
[INFO] [stdout]     |                                       ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 482 |     fn init_wake(constraints: &Vec<Rc<dyn Constraint>>, num_vars: usize)
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:589:21
[INFO] [stdout]     |
[INFO] [stdout] 589 |                 let mut set = Rc::make_mut(rc);
[INFO] [stdout]     |                     ----^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:622:21
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 let mut set = Rc::make_mut(rc);
[INFO] [stdout]     |                     ----^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:666:25
[INFO] [stdout]     |
[INFO] [stdout] 666 |                     let mut set = Rc::make_mut(rc);
[INFO] [stdout]     |                         ----^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:898:14
[INFO] [stdout]     |
[INFO] [stdout] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[INFO] [stdout]     |              ----^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:898:21
[INFO] [stdout]     |
[INFO] [stdout] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[INFO] [stdout]     |                     ----^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/puzzle.rs:434:17
[INFO] [stdout]     |
[INFO] [stdout] 434 |     pub fn step(&mut self) -> Option<PuzzleSearch> {
[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] 434 |     pub fn step(&mut self) -> Option<PuzzleSearch<'_>> {
[INFO] [stdout]     |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.60s
[INFO] running `Command { std: "docker" "inspect" "fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.repository`
[INFO] [stderr]   --> Cargo.toml:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 | homepage = "https://github.com/wangds/puzzle-solver.git"
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 | repository = "https://github.com/wangds/puzzle-solver.git"
[INFO] [stderr]    |              ---------------------------------------------
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `puzzle-solver` (manifest) generated 2 warnings
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/alldifferent.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             try!(search.remove_candidate(var2, val));
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/alldifferent.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |                     try!(search.set_candidate(var, val));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/equality.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 63 |                 try!(search.set_candidate(var, val.to_integer()));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/equality.rs:81:38
[INFO] [stdout]    |
[INFO] [stdout] 81 |             let (min_val, max_val) = try!(search.get_min_max(var));
[INFO] [stdout]    |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/constraint/equality.rs:107:38
[INFO] [stdout]     |
[INFO] [stdout] 107 |             let (min_val, max_val) = try!(search.get_min_max(var));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/constraint/equality.rs:120:23
[INFO] [stdout]     |
[INFO] [stdout] 120 |                     = try!(search.bound_candidate_range(var, min_bnd, max_bnd));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:470:22
[INFO] [stdout]     |
[INFO] [stdout] 470 |             let rc = try!(self.constraints[cidx].substitute(from, to));
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:734:17
[INFO] [stdout]     |
[INFO] [stdout] 734 |                 try!(constraint.on_assigned(self, var, val));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:764:21
[INFO] [stdout]     |
[INFO] [stdout] 764 |                     try!(self.assign(idx, val));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:778:21
[INFO] [stdout]     |
[INFO] [stdout] 778 |                     try!(constraint.on_updated(self));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:819:31
[INFO] [stdout]     |
[INFO] [stdout] 819 |         let new_constraints = try!(self.constraints.substitute(from, to));
[INFO] [stdout]     |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:826:13
[INFO] [stdout]     |
[INFO] [stdout] 826 |             try!(self.set_candidate(to, val));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::usize::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/puzzle.rs:422:40
[INFO] [stdout]     |
[INFO] [stdout] 422 |             search.solve(::std::usize::MAX, &mut solutions);
[INFO] [stdout]     |                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::usize::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/puzzle.rs:693:40
[INFO] [stdout]     |
[INFO] [stdout] 693 |                     _ => ::std::usize::MAX,
[INFO] [stdout]     |                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/puzzle.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 |     constraints: Vec<Rc<Constraint>>,
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 43 |     constraints: Vec<Rc<dyn Constraint>>,
[INFO] [stdout]    |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/puzzle.rs:50:25
[INFO] [stdout]    |
[INFO] [stdout] 50 |     constraints: Vec<Rc<Constraint>>,
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 |     constraints: Vec<Rc<dyn Constraint>>,
[INFO] [stdout]    |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/alldifferent.rs:33:34
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/mod.rs:15:34
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a>;
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a>;
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/alldifferent.rs:79:28
[INFO] [stdout]    |
[INFO] [stdout] 79 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 79 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/mod.rs:33:28
[INFO] [stdout]    |
[INFO] [stdout] 33 |             -> PsResult<Rc<Constraint>>;
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 |             -> PsResult<Rc<dyn Constraint>>;
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/equality.rs:35:34
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/constraint/equality.rs:138:28
[INFO] [stdout]     |
[INFO] [stdout] 138 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 138 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/unify.rs:36:34
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/unify.rs:53:28
[INFO] [stdout]    |
[INFO] [stdout] 53 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 53 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/puzzle.rs:542:20
[INFO] [stdout]     |
[INFO] [stdout] 542 |             -> Box<Iterator<Item=Val> + 'a> {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 542 |             -> Box<dyn Iterator<Item=Val> + 'a> {
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/puzzle.rs:81:34
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn iter<'a>(&'a self) -> Box<Iterator<Item=Val> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn iter<'a>(&'a self) -> Box<dyn Iterator<Item=Val> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/puzzle.rs:482:39
[INFO] [stdout]     |
[INFO] [stdout] 482 |     fn init_wake(constraints: &Vec<Rc<Constraint>>, num_vars: usize)
[INFO] [stdout]     |                                       ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 482 |     fn init_wake(constraints: &Vec<Rc<dyn Constraint>>, num_vars: usize)
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:589:21
[INFO] [stdout]     |
[INFO] [stdout] 589 |                 let mut set = Rc::make_mut(rc);
[INFO] [stdout]     |                     ----^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:622:21
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 let mut set = Rc::make_mut(rc);
[INFO] [stdout]     |                     ----^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:666:25
[INFO] [stdout]     |
[INFO] [stdout] 666 |                     let mut set = Rc::make_mut(rc);
[INFO] [stdout]     |                         ----^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:898:14
[INFO] [stdout]     |
[INFO] [stdout] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[INFO] [stdout]     |              ----^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:898:21
[INFO] [stdout]     |
[INFO] [stdout] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[INFO] [stdout]     |                     ----^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/puzzle.rs:434:17
[INFO] [stdout]     |
[INFO] [stdout] 434 |     pub fn step(&mut self) -> Option<PuzzleSearch> {
[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] 434 |     pub fn step(&mut self) -> Option<PuzzleSearch<'_>> {
[INFO] [stdout]     |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling puzzle-solver v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/alldifferent.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             try!(search.remove_candidate(var2, val));
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/alldifferent.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |                     try!(search.set_candidate(var, val));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/equality.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 63 |                 try!(search.set_candidate(var, val.to_integer()));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/constraint/equality.rs:81:38
[INFO] [stdout]    |
[INFO] [stdout] 81 |             let (min_val, max_val) = try!(search.get_min_max(var));
[INFO] [stdout]    |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/constraint/equality.rs:107:38
[INFO] [stdout]     |
[INFO] [stdout] 107 |             let (min_val, max_val) = try!(search.get_min_max(var));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/constraint/equality.rs:120:23
[INFO] [stdout]     |
[INFO] [stdout] 120 |                     = try!(search.bound_candidate_range(var, min_bnd, max_bnd));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:470:22
[INFO] [stdout]     |
[INFO] [stdout] 470 |             let rc = try!(self.constraints[cidx].substitute(from, to));
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:734:17
[INFO] [stdout]     |
[INFO] [stdout] 734 |                 try!(constraint.on_assigned(self, var, val));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:764:21
[INFO] [stdout]     |
[INFO] [stdout] 764 |                     try!(self.assign(idx, val));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:778:21
[INFO] [stdout]     |
[INFO] [stdout] 778 |                     try!(constraint.on_updated(self));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:819:31
[INFO] [stdout]     |
[INFO] [stdout] 819 |         let new_constraints = try!(self.constraints.substitute(from, to));
[INFO] [stdout]     |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/puzzle.rs:826:13
[INFO] [stdout]     |
[INFO] [stdout] 826 |             try!(self.set_candidate(to, val));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::usize::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/puzzle.rs:422:40
[INFO] [stdout]     |
[INFO] [stdout] 422 |             search.solve(::std::usize::MAX, &mut solutions);
[INFO] [stdout]     |                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::usize::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/puzzle.rs:693:40
[INFO] [stdout]     |
[INFO] [stdout] 693 |                     _ => ::std::usize::MAX,
[INFO] [stdout]     |                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/puzzle.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 |     constraints: Vec<Rc<Constraint>>,
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 43 |     constraints: Vec<Rc<dyn Constraint>>,
[INFO] [stdout]    |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/puzzle.rs:50:25
[INFO] [stdout]    |
[INFO] [stdout] 50 |     constraints: Vec<Rc<Constraint>>,
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 |     constraints: Vec<Rc<dyn Constraint>>,
[INFO] [stdout]    |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/alldifferent.rs:33:34
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/mod.rs:15:34
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a>;
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a>;
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/alldifferent.rs:79:28
[INFO] [stdout]    |
[INFO] [stdout] 79 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 79 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/mod.rs:33:28
[INFO] [stdout]    |
[INFO] [stdout] 33 |             -> PsResult<Rc<Constraint>>;
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 |             -> PsResult<Rc<dyn Constraint>>;
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/equality.rs:35:34
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/constraint/equality.rs:138:28
[INFO] [stdout]     |
[INFO] [stdout] 138 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 138 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/unify.rs:36:34
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/constraint/unify.rs:53:28
[INFO] [stdout]    |
[INFO] [stdout] 53 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 53 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> tests/takuzu.rs:31:17
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 try!(search.set_candidate(var, val & 1));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> tests/takuzu.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |                 try!(search.remove_candidate(self.value, c));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/puzzle.rs:542:20
[INFO] [stdout]     |
[INFO] [stdout] 542 |             -> Box<Iterator<Item=Val> + 'a> {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 542 |             -> Box<dyn Iterator<Item=Val> + 'a> {
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/takuzu.rs:22:34
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/puzzle.rs:81:34
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn iter<'a>(&'a self) -> Box<Iterator<Item=Val> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn iter<'a>(&'a self) -> Box<dyn Iterator<Item=Val> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/puzzle.rs:482:39
[INFO] [stdout]     |
[INFO] [stdout] 482 |     fn init_wake(constraints: &Vec<Rc<Constraint>>, num_vars: usize)
[INFO] [stdout]     |                                       ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 482 |     fn init_wake(constraints: &Vec<Rc<dyn Constraint>>, num_vars: usize)
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/takuzu.rs:49:28
[INFO] [stdout]    |
[INFO] [stdout] 49 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 49 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:589:21
[INFO] [stdout]     |
[INFO] [stdout] 589 |                 let mut set = Rc::make_mut(rc);
[INFO] [stdout]     |                     ----^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:622:21
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 let mut set = Rc::make_mut(rc);
[INFO] [stdout]     |                     ----^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:666:25
[INFO] [stdout]     |
[INFO] [stdout] 666 |                     let mut set = Rc::make_mut(rc);
[INFO] [stdout]     |                         ----^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:898:14
[INFO] [stdout]     |
[INFO] [stdout] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[INFO] [stdout]     |              ----^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/puzzle.rs:898:21
[INFO] [stdout]     |
[INFO] [stdout] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[INFO] [stdout]     |                     ----^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/puzzle.rs:434:17
[INFO] [stdout]     |
[INFO] [stdout] 434 |     pub fn step(&mut self) -> Option<PuzzleSearch> {
[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] 434 |     pub fn step(&mut self) -> Option<PuzzleSearch<'_>> {
[INFO] [stdout]     |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> tests/nonogram.rs:165:25
[INFO] [stdout]     |
[INFO] [stdout] 165 |                         try!(search.set_candidate(self.vars[idx], 0));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> tests/nonogram.rs:167:25
[INFO] [stdout]     |
[INFO] [stdout] 167 |                         try!(search.set_candidate(self.vars[idx], 1));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> tests/nonogram.rs:143:34
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]     |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> tests/nonogram.rs:176:28
[INFO] [stdout]     |
[INFO] [stdout] 176 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 176 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> tests/nonogram.rs:149:14
[INFO] [stdout]     |
[INFO] [stdout] 149 |         for (mut pos, &var) in trial.iter_mut().zip(&self.vars) {
[INFO] [stdout]     |              ----^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> tests/queens.rs:26:17
[INFO] [stdout]    |
[INFO] [stdout] 26 |                 try!(search.remove_candidate(var2, x1 - dy));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> tests/queens.rs:27:17
[INFO] [stdout]    |
[INFO] [stdout] 27 |                 try!(search.remove_candidate(var2, x1 + dy));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/queens.rs:15:34
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/queens.rs:35:28
[INFO] [stdout]    |
[INFO] [stdout] 35 |             -> PsResult<Rc<Constraint>> {
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3.85s
[INFO] running `Command { std: "docker" "inspect" "fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.repository`
[INFO] [stderr]   --> Cargo.toml:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 | homepage = "https://github.com/wangds/puzzle-solver.git"
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 | repository = "https://github.com/wangds/puzzle-solver.git"
[INFO] [stderr]    |              ---------------------------------------------
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `puzzle-solver` (manifest) generated 2 warnings
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/constraint/alldifferent.rs:40:13
[INFO] [stderr]    |
[INFO] [stderr] 40 |             try!(search.remove_candidate(var2, val));
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/constraint/alldifferent.rs:70:21
[INFO] [stderr]    |
[INFO] [stderr] 70 |                     try!(search.set_candidate(var, val));
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/constraint/equality.rs:63:17
[INFO] [stderr]    |
[INFO] [stderr] 63 |                 try!(search.set_candidate(var, val.to_integer()));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/constraint/equality.rs:81:38
[INFO] [stderr]    |
[INFO] [stderr] 81 |             let (min_val, max_val) = try!(search.get_min_max(var));
[INFO] [stderr]    |                                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/constraint/equality.rs:107:38
[INFO] [stderr]     |
[INFO] [stderr] 107 |             let (min_val, max_val) = try!(search.get_min_max(var));
[INFO] [stderr]     |                                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/constraint/equality.rs:120:23
[INFO] [stderr]     |
[INFO] [stderr] 120 |                     = try!(search.bound_candidate_range(var, min_bnd, max_bnd));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/puzzle.rs:470:22
[INFO] [stderr]     |
[INFO] [stderr] 470 |             let rc = try!(self.constraints[cidx].substitute(from, to));
[INFO] [stderr]     |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/puzzle.rs:734:17
[INFO] [stderr]     |
[INFO] [stderr] 734 |                 try!(constraint.on_assigned(self, var, val));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/puzzle.rs:764:21
[INFO] [stderr]     |
[INFO] [stderr] 764 |                     try!(self.assign(idx, val));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/puzzle.rs:778:21
[INFO] [stderr]     |
[INFO] [stderr] 778 |                     try!(constraint.on_updated(self));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/puzzle.rs:819:31
[INFO] [stderr]     |
[INFO] [stderr] 819 |         let new_constraints = try!(self.constraints.substitute(from, to));
[INFO] [stderr]     |                               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/puzzle.rs:826:13
[INFO] [stderr]     |
[INFO] [stderr] 826 |             try!(self.set_candidate(to, val));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `std::usize::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stderr]    --> src/puzzle.rs:422:40
[INFO] [stderr]     |
[INFO] [stderr] 422 |             search.solve(::std::usize::MAX, &mut solutions);
[INFO] [stderr]     |                                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `std::usize::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stderr]    --> src/puzzle.rs:693:40
[INFO] [stderr]     |
[INFO] [stderr] 693 |                     _ => ::std::usize::MAX,
[INFO] [stderr]     |                                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/puzzle.rs:43:25
[INFO] [stderr]    |
[INFO] [stderr] 43 |     constraints: Vec<Rc<Constraint>>,
[INFO] [stderr]    |                         ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 43 |     constraints: Vec<Rc<dyn Constraint>>,
[INFO] [stderr]    |                         +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/puzzle.rs:50:25
[INFO] [stderr]    |
[INFO] [stderr] 50 |     constraints: Vec<Rc<Constraint>>,
[INFO] [stderr]    |                         ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 50 |     constraints: Vec<Rc<dyn Constraint>>,
[INFO] [stderr]    |                         +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constraint/alldifferent.rs:33:34
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]    |                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constraint/mod.rs:15:34
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a>;
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a>;
[INFO] [stderr]    |                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constraint/alldifferent.rs:79:28
[INFO] [stderr]    |
[INFO] [stderr] 79 |             -> PsResult<Rc<Constraint>> {
[INFO] [stderr]    |                            ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 79 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stderr]    |                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constraint/mod.rs:33:28
[INFO] [stderr]    |
[INFO] [stderr] 33 |             -> PsResult<Rc<Constraint>>;
[INFO] [stderr]    |                            ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 33 |             -> PsResult<Rc<dyn Constraint>>;
[INFO] [stderr]    |                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constraint/equality.rs:35:34
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]    |                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/constraint/equality.rs:138:28
[INFO] [stderr]     |
[INFO] [stderr] 138 |             -> PsResult<Rc<Constraint>> {
[INFO] [stderr]     |                            ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 138 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stderr]     |                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constraint/unify.rs:36:34
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]    |                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constraint/unify.rs:53:28
[INFO] [stderr]    |
[INFO] [stderr] 53 |             -> PsResult<Rc<Constraint>> {
[INFO] [stderr]    |                            ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 53 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stderr]    |                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/puzzle.rs:542:20
[INFO] [stderr]     |
[INFO] [stderr] 542 |             -> Box<Iterator<Item=Val> + 'a> {
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 542 |             -> Box<dyn Iterator<Item=Val> + 'a> {
[INFO] [stderr]     |                    +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/puzzle.rs:81:34
[INFO] [stderr]    |
[INFO] [stderr] 81 |     fn iter<'a>(&'a self) -> Box<Iterator<Item=Val> + 'a> {
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 81 |     fn iter<'a>(&'a self) -> Box<dyn Iterator<Item=Val> + 'a> {
[INFO] [stderr]    |                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/puzzle.rs:482:39
[INFO] [stderr]     |
[INFO] [stderr] 482 |     fn init_wake(constraints: &Vec<Rc<Constraint>>, num_vars: usize)
[INFO] [stderr]     |                                       ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 482 |     fn init_wake(constraints: &Vec<Rc<dyn Constraint>>, num_vars: usize)
[INFO] [stderr]     |                                       +++
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/puzzle.rs:589:21
[INFO] [stderr]     |
[INFO] [stderr] 589 |                 let mut set = Rc::make_mut(rc);
[INFO] [stderr]     |                     ----^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/puzzle.rs:622:21
[INFO] [stderr]     |
[INFO] [stderr] 622 |                 let mut set = Rc::make_mut(rc);
[INFO] [stderr]     |                     ----^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/puzzle.rs:666:25
[INFO] [stderr]     |
[INFO] [stderr] 666 |                     let mut set = Rc::make_mut(rc);
[INFO] [stderr]     |                         ----^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/puzzle.rs:898:14
[INFO] [stderr]     |
[INFO] [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[INFO] [stderr]     |              ----^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/puzzle.rs:898:21
[INFO] [stderr]     |
[INFO] [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[INFO] [stderr]     |                     ----^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/puzzle.rs:434:17
[INFO] [stderr]     |
[INFO] [stderr] 434 |     pub fn step(&mut self) -> Option<PuzzleSearch> {
[INFO] [stderr]     |                 ^^^^^^^^^            ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 434 |     pub fn step(&mut self) -> Option<PuzzleSearch<'_>> {
[INFO] [stderr]     |                                                  ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `puzzle-solver` (lib) generated 33 warnings (run `cargo fix --lib -p puzzle-solver` to apply 19 suggestions)
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> tests/nonogram.rs:165:25
[INFO] [stderr]     |
[INFO] [stderr] 165 |                         try!(search.set_candidate(self.vars[idx], 0));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> tests/nonogram.rs:167:25
[INFO] [stderr]     |
[INFO] [stderr] 167 |                         try!(search.set_candidate(self.vars[idx], 1));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> tests/nonogram.rs:143:34
[INFO] [stderr]     |
[INFO] [stderr] 143 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 143 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]     |                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> tests/nonogram.rs:176:28
[INFO] [stderr]     |
[INFO] [stderr] 176 |             -> PsResult<Rc<Constraint>> {
[INFO] [stderr]     |                            ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 176 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stderr]     |                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/nonogram.rs:149:14
[INFO] [stderr]     |
[INFO] [stderr] 149 |         for (mut pos, &var) in trial.iter_mut().zip(&self.vars) {
[INFO] [stderr]     |              ----^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> tests/queens.rs:26:17
[INFO] [stderr]    |
[INFO] [stderr] 26 |                 try!(search.remove_candidate(var2, x1 - dy));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> tests/queens.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |                 try!(search.remove_candidate(var2, x1 + dy));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/queens.rs:15:34
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]    |                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/queens.rs:35:28
[INFO] [stderr]    |
[INFO] [stderr] 35 |             -> PsResult<Rc<Constraint>> {
[INFO] [stderr]    |                            ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 35 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stderr]    |                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: `puzzle-solver` (test "nonogram") generated 5 warnings (run `cargo fix --test "nonogram" -p puzzle-solver` to apply 3 suggestions)
[INFO] [stderr] warning: `puzzle-solver` (test "queens") generated 4 warnings (run `cargo fix --test "queens" -p puzzle-solver` to apply 2 suggestions)
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> tests/takuzu.rs:31:17
[INFO] [stderr]    |
[INFO] [stderr] 31 |                 try!(search.set_candidate(var, val & 1));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> tests/takuzu.rs:41:17
[INFO] [stderr]    |
[INFO] [stderr] 41 |                 try!(search.remove_candidate(self.value, c));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/takuzu.rs:22:34
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn vars<'a>(&'a self) -> Box<Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn vars<'a>(&'a self) -> Box<dyn Iterator<Item=&'a VarToken> + 'a> {
[INFO] [stderr]    |                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/takuzu.rs:49:28
[INFO] [stderr]    |
[INFO] [stderr] 49 |             -> PsResult<Rc<Constraint>> {
[INFO] [stderr]    |                            ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 49 |             -> PsResult<Rc<dyn Constraint>> {
[INFO] [stderr]    |                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: `puzzle-solver` (test "takuzu") generated 4 warnings (run `cargo fix --test "takuzu" -p puzzle-solver` to apply 2 suggestions)
[INFO] [stderr] warning: `puzzle-solver` (lib test) generated 33 warnings (33 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/build/puzzle-solver/514a44405c3d256d/out/puzzle_solver-514a44405c3d256d)
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test constraint::alldifferent::tests::test_contradiction ... ok
[INFO] [stdout] test constraint::alldifferent::tests::test_contradiction_by_length ... ok
[INFO] [stdout] test constraint::alldifferent::tests::test_constrain_by_value ... ok
[INFO] [stdout] test constraint::unify::tests::test_unify_equality ... ok
[INFO] [stdout] test constraint::equality::tests::test_reduce_range ... ok
[INFO] [stdout] test constraint::unify::tests::test_unify_unify ... ok
[INFO] [stdout] test constraint::equality::tests::test_assign ... ok
[INFO] [stdout] test constraint::equality::tests::test_contradiction ... ok
[INFO] [stdout] test puzzle::tests::test_no_vars ... ok
[INFO] [stdout] test linexpr::tests::test_ops ... ok
[INFO] [stdout] test constraint::unify::tests::test_unify_alldifferent ... ok
[INFO] [stdout] test linexpr::tests::test_coef_zero ... ok
[INFO] [stdout] test constraint::alldifferent::tests::test_elimination ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/hidato.rs (/opt/rustwide/target/debug/build/puzzle-solver/6a44bf03ba4fb1ff/out/hidato-6a44bf03ba4fb1ff)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test hidato_wikipedia ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/kakuro.rs (/opt/rustwide/target/debug/build/puzzle-solver/0dcc27e9d1761a03/out/kakuro-0dcc27e9d1761a03)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test kakuro_wikipedia ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/killersudoku.rs (/opt/rustwide/target/debug/build/puzzle-solver/287301f455b6a172/out/killersudoku-287301f455b6a172)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test killersudoku_wikipedia ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/magicsquare.rs (/opt/rustwide/target/debug/build/puzzle-solver/13132364689abdc4/out/magicsquare-13132364689abdc4)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test magicsquare_4x4 ... ok
[INFO] [stdout] test magicsquare_3x3 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/nonogram.rs (/opt/rustwide/target/debug/build/puzzle-solver/ad33e0c28ac809f6/out/nonogram-ad33e0c28ac809f6)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test nonogram_wikipedia ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.09s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/queens.rs (/opt/rustwide/target/debug/build/puzzle-solver/6ee6aefe6eaed6f4/out/queens-6ee6aefe6eaed6f4)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test queens_5x5 ... ok
[INFO] [stdout] test queens_4x4 ... ok
[INFO] [stdout] test queens_6x6 ... ok
[INFO] [stdout] test queens_7x7 ... ok
[INFO] [stdout] test queens_8x8 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/samuraisudoku.rs (/opt/rustwide/target/debug/build/puzzle-solver/822b1b5b76d57838/out/samuraisudoku-822b1b5b76d57838)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]      Running tests/sendmoremoney.rs (/opt/rustwide/target/debug/build/puzzle-solver/b7512dbdb0ce46ba/out/sendmoremoney-b7512dbdb0ce46ba)
[INFO] [stdout] test samuraisudoku_easy ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test sendmoremoney_naive ... ok
[INFO] [stderr]      Running tests/sudoku.rs (/opt/rustwide/target/debug/build/puzzle-solver/76140ff6f62bd4f6/out/sudoku-76140ff6f62bd4f6)
[INFO] [stdout] test sendmoremoney_carry ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test sudoku_wikipedia ... ok
[INFO] [stdout] test sudoku_hardest ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.16s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/sujiko.rs (/opt/rustwide/target/debug/build/puzzle-solver/37899681937ee4ae/out/sujiko-37899681937ee4ae)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test sujiko_simetric ... ok
[INFO] [stderr]      Running tests/takuzu.rs (/opt/rustwide/target/debug/build/puzzle-solver/227838a5273bdd5a/out/takuzu-227838a5273bdd5a)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test takuzu_grid1 ... ok
[INFO] [stdout] test takuzu_grid2 ... ok
[INFO] [stdout] test takuzu_grid3 ... ok
[INFO] [stdout] test takuzu_grid4 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.47s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/xkcd.rs (/opt/rustwide/target/debug/build/puzzle-solver/5e49075966c3084b/out/xkcd-5e49075966c3084b)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test xkcd_knapsack ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/zebra.rs (/opt/rustwide/target/debug/build/puzzle-solver/20097f1b0802efeb/out/zebra-20097f1b0802efeb)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test zebra ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests puzzle_solver
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::equals (line 324) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::intersect_candidates (line 272) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::new (line 97) ... ok
[INFO] [stdout] test src/constraint/equality.rs - constraint::equality::Equality::new (line 19) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::all_different (line 308) ... ok
[INFO] [stdout] test src/constraint/alldifferent.rs - constraint::alldifferent::AllDifferent::new (line 17) ... ok
[INFO] [stdout] test src/constraint/unify.rs - constraint::unify::Unify::new (line 18) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::new_var_with_candidates (line 130) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::new_var (line 114) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::insert_candidates (line 208) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::set_value (line 185) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::new_vars_with_candidates_2d (line 163) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::new_vars_with_candidates_1d (line 145) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::remove_candidates (line 239) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::solve_any (line 357) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::solve_all (line 408) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::unify (line 340) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::solve_unique (line 382) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.50s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790", kill_on_drop: false }`
[INFO] [stdout] fdb36ebd3857d2f4bd810107a8f0619b45bc10a3bb8b1341b7f7ead5bb8a2790
