[INFO] cloning repository https://github.com/RobJenks/simulated-annealing-optimisation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RobJenks/simulated-annealing-optimisation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRobJenks%2Fsimulated-annealing-optimisation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRobJenks%2Fsimulated-annealing-optimisation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6aa4b3c9f41a48a3fcbca4f3713715a127f74e1d
[INFO] checking RobJenks/simulated-annealing-optimisation against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRobJenks%2Fsimulated-annealing-optimisation" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RobJenks/simulated-annealing-optimisation on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/RobJenks/simulated-annealing-optimisation
[INFO] finished tweaking git repo https://github.com/RobJenks/simulated-annealing-optimisation
[INFO] tweaked toml for git repo https://github.com/RobJenks/simulated-annealing-optimisation written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/RobJenks/simulated-annealing-optimisation already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb1b5b5281819619067263791f6ed71b8906dfe1a73dff4fca0b73cf880636c2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "cb1b5b5281819619067263791f6ed71b8906dfe1a73dff4fca0b73cf880636c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb1b5b5281819619067263791f6ed71b8906dfe1a73dff4fca0b73cf880636c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb1b5b5281819619067263791f6ed71b8906dfe1a73dff4fca0b73cf880636c2", kill_on_drop: false }`
[INFO] [stdout] cb1b5b5281819619067263791f6ed71b8906dfe1a73dff4fca0b73cf880636c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b1b2697d7da7e2a763bddbc683e175afb5c8d20a31b47b661bb5e444f3fbf03
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2b1b2697d7da7e2a763bddbc683e175afb5c8d20a31b47b661bb5e444f3fbf03", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking simulated-annealing-optimisation v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/solver/mod.rs (1 fix)
[INFO] [stderr]        Fixed src/main.rs (2 fixes)
[INFO] [stderr]        Fixed src/systems/salesman/solvable.rs (1 fix)
[INFO] [stderr]        Fixed src/system/mod.rs (1 fix)
[INFO] [stderr]        Fixed src/systems/debug/state.rs (4 fixes)
[INFO] [stderr]        Fixed src/system/state.rs (2 fixes)
[INFO] [stdout] warning: variant is never constructed: `Noop`
[INFO] [stdout]  --> src/solver/command.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Noop,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `solver_id`
[INFO] [stdout]  --> src/solver/result.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     solver_id: SolverId,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_solver_id`
[INFO] [stdout]   --> src/solver/result.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn get_solver_id(&self) -> SolverId { self.solver_id }
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Noop`
[INFO] [stdout]  --> src/solver/signal.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Noop,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `command_receiver`
[INFO] [stdout]   --> src/solver/mod.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     command_receiver: Receiver<Command>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `shutdown_requested`
[INFO] [stdout]   --> src/system/mod.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn shutdown_requested(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `terminate_solver_by_id`
[INFO] [stdout]    --> src/system/mod.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn terminate_solver_by_id(&mut self, solver_id: &SolverId) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_debug`
[INFO] [stdout]   --> src/main.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn run_debug() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/solver/mod.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |             output.send(SolverResult::new(id, state));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/solver/mod.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |         self.signal_sender.send(SolverSignal::Complete(self.id));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed src/systems/debug/state.rs (1 fix)
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Noop`
[INFO] [stdout]  --> src/solver/command.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Noop,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `solver_id`
[INFO] [stdout]  --> src/solver/result.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     solver_id: SolverId,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_solver_id`
[INFO] [stdout]   --> src/solver/result.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn get_solver_id(&self) -> SolverId { self.solver_id }
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Noop`
[INFO] [stdout]  --> src/solver/signal.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Noop,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `command_receiver`
[INFO] [stdout]   --> src/solver/mod.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     command_receiver: Receiver<Command>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `shutdown_requested`
[INFO] [stdout]   --> src/system/mod.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn shutdown_requested(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `terminate_solver_by_id`
[INFO] [stdout]    --> src/system/mod.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn terminate_solver_by_id(&mut self, solver_id: &SolverId) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_debug`
[INFO] [stdout]   --> src/main.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn run_debug() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/solver/mod.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |             output.send(SolverResult::new(id, state));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/solver/mod.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |         self.signal_sender.send(SolverSignal::Complete(self.id));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.00s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking simulated-annealing-optimisation v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: variant is never constructed: `Noop`
[INFO] [stdout]  --> src/solver/command.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Noop,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `solver_id`
[INFO] [stdout]  --> src/solver/result.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     solver_id: SolverId,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_solver_id`
[INFO] [stdout]   --> src/solver/result.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn get_solver_id(&self) -> SolverId { self.solver_id }
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Noop`
[INFO] [stdout]  --> src/solver/signal.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Noop,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `command_receiver`
[INFO] [stdout]   --> src/solver/mod.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     command_receiver: Receiver<Command>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `shutdown_requested`
[INFO] [stdout]   --> src/system/mod.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn shutdown_requested(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `terminate_solver_by_id`
[INFO] [stdout]    --> src/system/mod.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn terminate_solver_by_id(&mut self, solver_id: &SolverId) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_debug`
[INFO] [stdout]   --> src/main.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn run_debug() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/solver/mod.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |             output.send(SolverResult::new(id, state));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/solver/mod.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |         self.signal_sender.send(SolverSignal::Complete(self.id));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Noop`
[INFO] [stdout]  --> src/solver/command.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Noop,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `solver_id`
[INFO] [stdout]  --> src/solver/result.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     solver_id: SolverId,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_solver_id`
[INFO] [stdout]   --> src/solver/result.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn get_solver_id(&self) -> SolverId { self.solver_id }
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Noop`
[INFO] [stdout]  --> src/solver/signal.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Noop,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `command_receiver`
[INFO] [stdout]   --> src/solver/mod.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     command_receiver: Receiver<Command>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `shutdown_requested`
[INFO] [stdout]   --> src/system/mod.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn shutdown_requested(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `terminate_solver_by_id`
[INFO] [stdout]    --> src/system/mod.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn terminate_solver_by_id(&mut self, solver_id: &SolverId) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_debug`
[INFO] [stdout]   --> src/main.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn run_debug() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/solver/mod.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |             output.send(SolverResult::new(id, state));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/solver/mod.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |         self.signal_sender.send(SolverSignal::Complete(self.id));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "2b1b2697d7da7e2a763bddbc683e175afb5c8d20a31b47b661bb5e444f3fbf03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b1b2697d7da7e2a763bddbc683e175afb5c8d20a31b47b661bb5e444f3fbf03", kill_on_drop: false }`
[INFO] [stdout] 2b1b2697d7da7e2a763bddbc683e175afb5c8d20a31b47b661bb5e444f3fbf03