[INFO] fetching crate puzzle-solver 0.4.1...
[INFO] testing puzzle-solver-0.4.1 against nightly-2025-01-18+rustflags=-Zrandomize-layout for randomize-layout-2
[INFO] extracting crate puzzle-solver 0.4.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate puzzle-solver 0.4.1 on toolchain nightly-2025-01-18
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2025-01-18" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2025-01-18" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] [stderr]       Adding bit-set v0.4.0 (available: v0.8.0)
[INFO] [stderr]       Adding num-rational v0.1.42 (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" "+nightly-2025-01-18" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2025-01-18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba62e21bdb78569c1f47709bac7efc566a2a0ac29825b7eec8157cf2de5d29e7
[INFO] running `Command { std: "docker" "start" "-a" "ba62e21bdb78569c1f47709bac7efc566a2a0ac29825b7eec8157cf2de5d29e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba62e21bdb78569c1f47709bac7efc566a2a0ac29825b7eec8157cf2de5d29e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba62e21bdb78569c1f47709bac7efc566a2a0ac29825b7eec8157cf2de5d29e7", kill_on_drop: false }`
[INFO] [stdout] ba62e21bdb78569c1f47709bac7efc566a2a0ac29825b7eec8157cf2de5d29e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Zrandomize-layout" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2025-01-18" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 203a1b1fbba0fc52163e89e43a9328172739ec6ba5698c9381f91e9c875b62e2
[INFO] running `Command { std: "docker" "start" "-a" "203a1b1fbba0fc52163e89e43a9328172739ec6ba5698c9381f91e9c875b62e2", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling autocfg v1.4.0
[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-integer v0.1.46
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling num-rational v0.1.42
[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: 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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` 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/nightly/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/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/nightly/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/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/nightly/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/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/nightly/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/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/nightly/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/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/nightly/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/nightly/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/nightly/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/nightly/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/nightly/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/nightly/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/nightly/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)]` 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.46s
[INFO] running `Command { std: "docker" "inspect" "203a1b1fbba0fc52163e89e43a9328172739ec6ba5698c9381f91e9c875b62e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "203a1b1fbba0fc52163e89e43a9328172739ec6ba5698c9381f91e9c875b62e2", kill_on_drop: false }`
[INFO] [stdout] 203a1b1fbba0fc52163e89e43a9328172739ec6ba5698c9381f91e9c875b62e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Zrandomize-layout" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2025-01-18" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e87c04486d43e966b673dcfba622da6d9c3c366928c374fcf949c1c62bcd3f2f
[INFO] running `Command { std: "docker" "start" "-a" "e87c04486d43e966b673dcfba622da6d9c3c366928c374fcf949c1c62bcd3f2f", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[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: 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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` 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/nightly/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/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/nightly/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/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/nightly/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/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/nightly/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/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/nightly/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/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/nightly/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/nightly/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/nightly/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/nightly/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] [stderr]    Compiling puzzle-solver v0.4.1 (/opt/rustwide/workdir)
[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/nightly/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/nightly/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/nightly/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)]` 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: 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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` 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/nightly/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] [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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` 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/nightly/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: 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]   --> 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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` 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]   --> 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/nightly/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]    --> 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)]` 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: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: 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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` 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/nightly/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/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/nightly/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/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/nightly/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/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/nightly/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/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/nightly/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/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/nightly/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/nightly/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/nightly/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/nightly/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/nightly/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/nightly/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/nightly/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)]` 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] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: LC_ALL="C" PATH="/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin:/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/self-contained:/opt/rustwide/cargo-home/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" VSLANG="1033" "cc" "-m64" "/tmp/rustcfqdgQZ/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-56d991603ff5adf3.rlib,libgetopts-0374f2ffd4fc2ee9.rlib,libunicode_width-3710af304f7a6204.rlib,librustc_std_workspace_std-b58fe15d3ae9c93b.rlib}" "/opt/rustwide/target/debug/deps/{libpuzzle_solver-a7a0875832cccca5.rlib,libnum_traits-518d2ead0a99f267.rlib,libnum_rational-8b4be0ea7f78a25f.rlib,libnum_integer-dbf0158be5a3e972.rlib,libnum_traits-7668c969a539722c.rlib,libbit_set-f7fb4fb5d2060d3e.rlib,libbit_vec-809f8272daa7d828.rlib}" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-006123e2ce67e99d.rlib,libpanic_unwind-e1447e1efa6f1e57.rlib,libobject-f6963a4916fcf097.rlib,libmemchr-49a2d9af912f4524.rlib,libaddr2line-04d19aad3936869d.rlib,libgimli-483c235edb789db0.rlib,librustc_demangle-294281af50b8f748.rlib,libstd_detect-3b08295250aabc2a.rlib,libhashbrown-4472d1e05ba0dfaf.rlib,librustc_std_workspace_alloc-2ef099fac590e457.rlib,libminiz_oxide-8a51f5e848546c29.rlib,libadler2-3d3fa22b868db521.rlib,libunwind-0ffda8b08e22dbea.rlib,libcfg_if-b08f62458fdd43b9.rlib,liblibc-559675126e63b890.rlib,liballoc-fcf21c8d1c9c7b75.rlib,librustc_std_workspace_core-e0b0460135bcf21d.rlib,libcore-d4097fdcbddd3bc7.rlib,libcompiler_builtins-fea484ac1eed7881.rlib}" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-B/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/samuraisudoku-ef3845e573be6145" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
[INFO] [stdout]           LLVM ERROR: IO failure on output stream: No space left on device
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] rustc-LLVM ERROR: IO failure on output stream: No space left on device
[INFO] [stderr] error: could not compile `puzzle-solver` (test "samuraisudoku") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: LC_ALL="C" PATH="/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin:/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/self-contained:/opt/rustwide/cargo-home/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" VSLANG="1033" "cc" "-m64" "/tmp/rustc5MEID1/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-56d991603ff5adf3.rlib,libgetopts-0374f2ffd4fc2ee9.rlib,libunicode_width-3710af304f7a6204.rlib,librustc_std_workspace_std-b58fe15d3ae9c93b.rlib}" "/opt/rustwide/target/debug/deps/{libpuzzle_solver-a7a0875832cccca5.rlib,libnum_traits-518d2ead0a99f267.rlib,libnum_rational-8b4be0ea7f78a25f.rlib,libnum_integer-dbf0158be5a3e972.rlib,libnum_traits-7668c969a539722c.rlib,libbit_set-f7fb4fb5d2060d3e.rlib,libbit_vec-809f8272daa7d828.rlib}" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-006123e2ce67e99d.rlib,libpanic_unwind-e1447e1efa6f1e57.rlib,libobject-f6963a4916fcf097.rlib,libmemchr-49a2d9af912f4524.rlib,libaddr2line-04d19aad3936869d.rlib,libgimli-483c235edb789db0.rlib,librustc_demangle-294281af50b8f748.rlib,libstd_detect-3b08295250aabc2a.rlib,libhashbrown-4472d1e05ba0dfaf.rlib,librustc_std_workspace_alloc-2ef099fac590e457.rlib,libminiz_oxide-8a51f5e848546c29.rlib,libadler2-3d3fa22b868db521.rlib,libunwind-0ffda8b08e22dbea.rlib,libcfg_if-b08f62458fdd43b9.rlib,liblibc-559675126e63b890.rlib,liballoc-fcf21c8d1c9c7b75.rlib,librustc_std_workspace_core-e0b0460135bcf21d.rlib,libcore-d4097fdcbddd3bc7.rlib,libcompiler_builtins-fea484ac1eed7881.rlib}" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-B/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/zebra-0baf89881f947311" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
[INFO] [stdout]           collect2: fatal error: ld terminated with signal 7 [Bus error], core dumped
[INFO] [stdout]           compilation terminated.
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `puzzle-solver` (lib test); 30 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/bin/rustc --crate-name puzzle_solver --edition=2015 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=4ceab48a7166becd -C extra-filename=-99d308e1fea3e9b1 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bit_set=/opt/rustwide/target/debug/deps/libbit_set-f7fb4fb5d2060d3e.rlib --extern num_rational=/opt/rustwide/target/debug/deps/libnum_rational-8b4be0ea7f78a25f.rlib --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-518d2ead0a99f267.rlib --cap-lints=forbid -Zrandomize-layout` (exit status: 101)
[INFO] [stderr] error: could not compile `puzzle-solver` (test "zebra") due to 1 previous error
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: LC_ALL="C" PATH="/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin:/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/self-contained:/opt/rustwide/cargo-home/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" VSLANG="1033" "cc" "-m64" "/tmp/rustcTdmLcE/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-56d991603ff5adf3.rlib,libgetopts-0374f2ffd4fc2ee9.rlib,libunicode_width-3710af304f7a6204.rlib,librustc_std_workspace_std-b58fe15d3ae9c93b.rlib}" "/opt/rustwide/target/debug/deps/{libpuzzle_solver-a7a0875832cccca5.rlib,libnum_traits-518d2ead0a99f267.rlib,libnum_rational-8b4be0ea7f78a25f.rlib,libnum_integer-dbf0158be5a3e972.rlib,libnum_traits-7668c969a539722c.rlib,libbit_set-f7fb4fb5d2060d3e.rlib,libbit_vec-809f8272daa7d828.rlib}" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-006123e2ce67e99d.rlib,libpanic_unwind-e1447e1efa6f1e57.rlib,libobject-f6963a4916fcf097.rlib,libmemchr-49a2d9af912f4524.rlib,libaddr2line-04d19aad3936869d.rlib,libgimli-483c235edb789db0.rlib,librustc_demangle-294281af50b8f748.rlib,libstd_detect-3b08295250aabc2a.rlib,libhashbrown-4472d1e05ba0dfaf.rlib,librustc_std_workspace_alloc-2ef099fac590e457.rlib,libminiz_oxide-8a51f5e848546c29.rlib,libadler2-3d3fa22b868db521.rlib,libunwind-0ffda8b08e22dbea.rlib,libcfg_if-b08f62458fdd43b9.rlib,liblibc-559675126e63b890.rlib,liballoc-fcf21c8d1c9c7b75.rlib,librustc_std_workspace_core-e0b0460135bcf21d.rlib,libcore-d4097fdcbddd3bc7.rlib,libcompiler_builtins-fea484ac1eed7881.rlib}" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-B/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/hidato-76b21f680ac8ad31" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
[INFO] [stdout]           LLVM ERROR: IO failure on output stream: No space left on device
[INFO] [stdout]           collect2: fatal error: ld terminated with signal 7 [Bus error], core dumped
[INFO] [stdout]           compilation terminated.
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `puzzle-solver` (test "hidato") due to 1 previous error
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: LC_ALL="C" PATH="/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin:/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/self-contained:/opt/rustwide/cargo-home/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" VSLANG="1033" "cc" "-m64" "/tmp/rustcpA74Om/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-56d991603ff5adf3.rlib,libgetopts-0374f2ffd4fc2ee9.rlib,libunicode_width-3710af304f7a6204.rlib,librustc_std_workspace_std-b58fe15d3ae9c93b.rlib}" "/opt/rustwide/target/debug/deps/{libpuzzle_solver-a7a0875832cccca5.rlib,libbit_set-f7fb4fb5d2060d3e.rlib,libbit_vec-809f8272daa7d828.rlib,libnum_traits-518d2ead0a99f267.rlib,libnum_rational-8b4be0ea7f78a25f.rlib,libnum_integer-dbf0158be5a3e972.rlib,libnum_traits-7668c969a539722c.rlib}" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-006123e2ce67e99d.rlib,libpanic_unwind-e1447e1efa6f1e57.rlib,libobject-f6963a4916fcf097.rlib,libmemchr-49a2d9af912f4524.rlib,libaddr2line-04d19aad3936869d.rlib,libgimli-483c235edb789db0.rlib,librustc_demangle-294281af50b8f748.rlib,libstd_detect-3b08295250aabc2a.rlib,libhashbrown-4472d1e05ba0dfaf.rlib,librustc_std_workspace_alloc-2ef099fac590e457.rlib,libminiz_oxide-8a51f5e848546c29.rlib,libadler2-3d3fa22b868db521.rlib,libunwind-0ffda8b08e22dbea.rlib,libcfg_if-b08f62458fdd43b9.rlib,liblibc-559675126e63b890.rlib,liballoc-fcf21c8d1c9c7b75.rlib,librustc_std_workspace_core-e0b0460135bcf21d.rlib,libcore-d4097fdcbddd3bc7.rlib,libcompiler_builtins-fea484ac1eed7881.rlib}" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-B/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/nightly-2025-01-18-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/xkcd-4e1adb9aff71c8ba" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
[INFO] [stdout]           collect2: fatal error: ld terminated with signal 7 [Bus error], core dumped
[INFO] [stdout]           compilation terminated.
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `puzzle-solver` (test "xkcd") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "e87c04486d43e966b673dcfba622da6d9c3c366928c374fcf949c1c62bcd3f2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e87c04486d43e966b673dcfba622da6d9c3c366928c374fcf949c1c62bcd3f2f", kill_on_drop: false }`
[INFO] [stdout] e87c04486d43e966b673dcfba622da6d9c3c366928c374fcf949c1c62bcd3f2f
