[INFO] cloning repository https://github.com/TGElder/hanger-lane
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TGElder/hanger-lane" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTGElder%2Fhanger-lane", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTGElder%2Fhanger-lane'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f1630f503fed6458cbf34c879ebc0955d1b40c9c
[INFO] testing TGElder/hanger-lane against 1.75.0 for beta-1.76-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTGElder%2Fhanger-lane" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TGElder/hanger-lane on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TGElder/hanger-lane
[INFO] finished tweaking git repo https://github.com/TGElder/hanger-lane
[INFO] tweaked toml for git repo https://github.com/TGElder/hanger-lane written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/TGElder/hanger-lane already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "d328626270f579220e780ea5ea70d9742d62adad1f6567f403a02f29b287cab3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d328626270f579220e780ea5ea70d9742d62adad1f6567f403a02f29b287cab3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d328626270f579220e780ea5ea70d9742d62adad1f6567f403a02f29b287cab3", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "9142e24403478dd0cac587c66c7d8cd315b12d52b9aae0bcee1b070fb8de4e90", kill_on_drop: false }`
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[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub rng: Box<Rng>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub rng: Box<dyn Rng>,
[INFO] [stdout]    |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:25:26
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub updates: Vec<Box<VehicleUpdate>>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub updates: Vec<Box<dyn VehicleUpdate>>,
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:43:24
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub steps: Vec<Box<SimulationStep>>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub steps: Vec<Box<dyn SimulationStep>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/traffic_lights.rs:13:24
[INFO] [stdout]    |
[INFO] [stdout] 13 |     timer: RefCell<Box<Timer>>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     timer: RefCell<Box<dyn Timer>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:21:86
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<Rng>);
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<dyn Rng>);
[INFO] [stdout]    |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/lookahead_driver.rs:47:86
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<Rng>) {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<dyn Rng>) {
[INFO] [stdout]    |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/block_occupier.rs:17:87
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<Rng>) {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<dyn Rng>) {
[INFO] [stdout]    |                                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/block_occupier.rs:37:87
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<Rng>) {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<dyn Rng>) {
[INFO] [stdout]    |                                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/traffic_lights.rs:19:59
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn new(nodes: Vec<Vec<usize>>, timer: RefCell<Box<Timer>>, occupancy: &mut Occupancy) -> TrafficLights {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn new(nodes: Vec<Vec<usize>>, timer: RefCell<Box<dyn Timer>>, occupancy: &mut Occupancy) -> TrafficLights {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/city.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct City {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 29 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `City` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/bin/main.rs:144:34
[INFO] [stdout]     |
[INFO] [stdout] 144 |     let vehicle_updates: Vec<Box<VehicleUpdate>> = vec![
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 144 |     let vehicle_updates: Vec<Box<dyn VehicleUpdate>> = vec![
[INFO] [stdout]     |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.55s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "9142e24403478dd0cac587c66c7d8cd315b12d52b9aae0bcee1b070fb8de4e90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9142e24403478dd0cac587c66c7d8cd315b12d52b9aae0bcee1b070fb8de4e90", kill_on_drop: false }`
[INFO] [stdout] 9142e24403478dd0cac587c66c7d8cd315b12d52b9aae0bcee1b070fb8de4e90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79ae2c3659e8475442126526bb1d2a25365d731498f7ddb53db9a50f103a3601
[INFO] running `Command { std: "docker" "start" "-a" "79ae2c3659e8475442126526bb1d2a25365d731498f7ddb53db9a50f103a3601", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub rng: Box<Rng>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub rng: Box<dyn Rng>,
[INFO] [stdout]    |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:25:26
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub updates: Vec<Box<VehicleUpdate>>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub updates: Vec<Box<dyn VehicleUpdate>>,
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:43:24
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub steps: Vec<Box<SimulationStep>>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub steps: Vec<Box<dyn SimulationStep>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling hanger_lane v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/traffic_lights.rs:13:24
[INFO] [stdout]    |
[INFO] [stdout] 13 |     timer: RefCell<Box<Timer>>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     timer: RefCell<Box<dyn Timer>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:21:86
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<Rng>);
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<dyn Rng>);
[INFO] [stdout]    |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/lookahead_driver.rs:47:86
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<Rng>) {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<dyn Rng>) {
[INFO] [stdout]    |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/block_occupier.rs:17:87
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<Rng>) {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<dyn Rng>) {
[INFO] [stdout]    |                                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/block_occupier.rs:37:87
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<Rng>) {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<dyn Rng>) {
[INFO] [stdout]    |                                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/traffic_lights.rs:19:59
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn new(nodes: Vec<Vec<usize>>, timer: RefCell<Box<Timer>>, occupancy: &mut Occupancy) -> TrafficLights {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn new(nodes: Vec<Vec<usize>>, timer: RefCell<Box<dyn Timer>>, occupancy: &mut Occupancy) -> TrafficLights {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/city.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct City {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 29 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `City` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/bin/main.rs:144:34
[INFO] [stdout]     |
[INFO] [stdout] 144 |     let vehicle_updates: Vec<Box<VehicleUpdate>> = vec![
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 144 |     let vehicle_updates: Vec<Box<dyn VehicleUpdate>> = vec![
[INFO] [stdout]     |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/city.rs:136:44
[INFO] [stdout]     |
[INFO] [stdout] 136 |         let mut cells = Vec::with_capacity((city.width * city.height * 4));
[INFO] [stdout]     |                                            ^                            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 136 -         let mut cells = Vec::with_capacity((city.width * city.height * 4));
[INFO] [stdout] 136 +         let mut cells = Vec::with_capacity(city.width * city.height * 4);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub rng: Box<Rng>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub rng: Box<dyn Rng>,
[INFO] [stdout]    |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:25:26
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub updates: Vec<Box<VehicleUpdate>>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub updates: Vec<Box<dyn VehicleUpdate>>,
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:43:24
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub steps: Vec<Box<SimulationStep>>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub steps: Vec<Box<dyn SimulationStep>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/traffic_lights.rs:13:24
[INFO] [stdout]    |
[INFO] [stdout] 13 |     timer: RefCell<Box<Timer>>,
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     timer: RefCell<Box<dyn Timer>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/simulation.rs:21:86
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<Rng>);
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<dyn Rng>);
[INFO] [stdout]    |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/lookahead_driver.rs:47:86
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<Rng>) {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<dyn Rng>) {
[INFO] [stdout]    |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/lookahead_driver.rs:96:117
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn init(lookahead: usize, vehicle: usize, destination: Vec<usize>) -> (LookaheadDriver, Vehicle, Occupancy, Box<Rng>) {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn init(lookahead: usize, vehicle: usize, destination: Vec<usize>) -> (LookaheadDriver, Vehicle, Occupancy, Box<dyn Rng>) {
[INFO] [stdout]    |                                                                                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/block_occupier.rs:17:87
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<Rng>) {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<dyn Rng>) {
[INFO] [stdout]    |                                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/block_occupier.rs:37:87
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<Rng>) {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<dyn Rng>) {
[INFO] [stdout]    |                                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/traffic_lights.rs:19:59
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn new(nodes: Vec<Vec<usize>>, timer: RefCell<Box<Timer>>, occupancy: &mut Occupancy) -> TrafficLights {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn new(nodes: Vec<Vec<usize>>, timer: RefCell<Box<dyn Timer>>, occupancy: &mut Occupancy) -> TrafficLights {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/steps/lookahead_driver.rs:100:22
[INFO] [stdout]     |
[INFO] [stdout] 100 |         let rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 100 |         let rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/steps/lookahead_driver.rs:267:26
[INFO] [stdout]     |
[INFO] [stdout] 267 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 267 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]     |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/steps/lookahead_driver.rs:289:26
[INFO] [stdout]     |
[INFO] [stdout] 289 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 289 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]     |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/block_occupier.rs:65:26
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/block_occupier.rs:78:26
[INFO] [stdout]    |
[INFO] [stdout] 78 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 78 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/steps/block_occupier.rs:92:26
[INFO] [stdout]    |
[INFO] [stdout] 92 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 92 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/steps/block_occupier.rs:107:26
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]     |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/steps/block_occupier.rs:121:26
[INFO] [stdout]     |
[INFO] [stdout] 121 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 121 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]     |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/steps/block_occupier.rs:136:26
[INFO] [stdout]     |
[INFO] [stdout] 136 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 136 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]     |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/steps/block_occupier.rs:152:26
[INFO] [stdout]     |
[INFO] [stdout] 152 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 152 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]     |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/steps/traffic_lights.rs:109:22
[INFO] [stdout]     |
[INFO] [stdout] 109 |         let rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 109 |         let rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/steps/traffic_lights.rs:129:22
[INFO] [stdout]     |
[INFO] [stdout] 129 |         let rng: Box<Rng> = Box::new(rand::thread_rng());
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 129 |         let rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/city.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct City {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 29 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `City` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.53s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "79ae2c3659e8475442126526bb1d2a25365d731498f7ddb53db9a50f103a3601", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79ae2c3659e8475442126526bb1d2a25365d731498f7ddb53db9a50f103a3601", kill_on_drop: false }`
[INFO] [stdout] 79ae2c3659e8475442126526bb1d2a25365d731498f7ddb53db9a50f103a3601
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3b10b96edae287bef7680eea4d17974cc5dae2f4ae3ab3598fa51122a2751af0
[INFO] running `Command { std: "docker" "start" "-a" "3b10b96edae287bef7680eea4d17974cc5dae2f4ae3ab3598fa51122a2751af0", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/simulation.rs:13:18
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub rng: Box<Rng>,
[INFO] [stderr]    |                  ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub rng: Box<dyn Rng>,
[INFO] [stderr]    |                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/simulation.rs:25:26
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub updates: Vec<Box<VehicleUpdate>>,
[INFO] [stderr]    |                          ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub updates: Vec<Box<dyn VehicleUpdate>>,
[INFO] [stderr]    |                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/simulation.rs:43:24
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub steps: Vec<Box<SimulationStep>>,
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub steps: Vec<Box<dyn SimulationStep>>,
[INFO] [stderr]    |                        +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/steps/traffic_lights.rs:13:24
[INFO] [stderr]    |
[INFO] [stderr] 13 |     timer: RefCell<Box<Timer>>,
[INFO] [stderr]    |                        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 13 |     timer: RefCell<Box<dyn Timer>>,
[INFO] [stderr]    |                        +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/simulation.rs:21:86
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<Rng>);
[INFO] [stderr]    |                                                                                      ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<dyn Rng>);
[INFO] [stderr]    |                                                                                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/steps/lookahead_driver.rs:47:86
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<Rng>) {
[INFO] [stderr]    |                                                                                      ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, rng: &mut Box<dyn Rng>) {
[INFO] [stderr]    |                                                                                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/steps/block_occupier.rs:17:87
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<Rng>) {
[INFO] [stderr]    |                                                                                       ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<dyn Rng>) {
[INFO] [stderr]    |                                                                                       +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/steps/block_occupier.rs:37:87
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<Rng>) {
[INFO] [stderr]    |                                                                                       ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn update(&self, vehicle: &mut Vehicle, occupancy: &mut Occupancy, _rng: &mut Box<dyn Rng>) {
[INFO] [stderr]    |                                                                                       +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/steps/traffic_lights.rs:19:59
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn new(nodes: Vec<Vec<usize>>, timer: RefCell<Box<Timer>>, occupancy: &mut Occupancy) -> TrafficLights {
[INFO] [stderr]    |                                                           ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn new(nodes: Vec<Vec<usize>>, timer: RefCell<Box<dyn Timer>>, occupancy: &mut Occupancy) -> TrafficLights {
[INFO] [stderr]    |                                                           +++
[INFO] [stderr] 
[INFO] [stderr] warning: field `id` is never read
[INFO] [stderr]   --> src/city.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 28 | pub struct City {
[INFO] [stderr]    |            ---- field in this struct
[INFO] [stderr] 29 |     id: usize,
[INFO] [stderr]    |     ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `City` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/city.rs:136:44
[INFO] [stderr]     |
[INFO] [stderr] 136 |         let mut cells = Vec::with_capacity((city.width * city.height * 4));
[INFO] [stderr]     |                                            ^                            ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 136 -         let mut cells = Vec::with_capacity((city.width * city.height * 4));
[INFO] [stderr] 136 +         let mut cells = Vec::with_capacity(city.width * city.height * 4);
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/steps/lookahead_driver.rs:96:117
[INFO] [stderr]    |
[INFO] [stderr] 96 |     fn init(lookahead: usize, vehicle: usize, destination: Vec<usize>) -> (LookaheadDriver, Vehicle, Occupancy, Box<Rng>) {
[INFO] [stderr]    |                                                                                                                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 96 |     fn init(lookahead: usize, vehicle: usize, destination: Vec<usize>) -> (LookaheadDriver, Vehicle, Occupancy, Box<dyn Rng>) {
[INFO] [stderr]    |                                                                                                                     +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/steps/lookahead_driver.rs:100:22
[INFO] [stderr]     |
[INFO] [stderr] 100 |         let rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                      ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 100 |         let rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/steps/lookahead_driver.rs:267:26
[INFO] [stderr]     |
[INFO] [stderr] 267 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 267 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/steps/lookahead_driver.rs:289:26
[INFO] [stderr]     |
[INFO] [stderr] 289 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 289 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/steps/block_occupier.rs:65:26
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]    |                          ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]    |                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/steps/block_occupier.rs:78:26
[INFO] [stderr]    |
[INFO] [stderr] 78 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]    |                          ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 78 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]    |                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/steps/block_occupier.rs:92:26
[INFO] [stderr]    |
[INFO] [stderr] 92 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]    |                          ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 92 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]    |                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/steps/block_occupier.rs:107:26
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/steps/block_occupier.rs:121:26
[INFO] [stderr]     |
[INFO] [stderr] 121 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 121 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/steps/block_occupier.rs:136:26
[INFO] [stderr]     |
[INFO] [stderr] 136 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 136 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/steps/block_occupier.rs:152:26
[INFO] [stderr]     |
[INFO] [stderr] 152 |         let mut rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 152 |         let mut rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/steps/traffic_lights.rs:109:22
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                      ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/steps/traffic_lights.rs:129:22
[INFO] [stderr]     |
[INFO] [stderr] 129 |         let rng: Box<Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                      ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 129 |         let rng: Box<dyn Rng> = Box::new(rand::thread_rng());
[INFO] [stderr]     |                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: `hanger_lane` (lib) generated 10 warnings (run `cargo fix --lib -p hanger_lane` to apply 9 suggestions)
[INFO] [stderr] warning: `hanger_lane` (lib test) generated 24 warnings (10 duplicates) (run `cargo fix --lib -p hanger_lane --tests` to apply 14 suggestions)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/bin/main.rs:144:34
[INFO] [stderr]     |
[INFO] [stderr] 144 |     let vehicle_updates: Vec<Box<VehicleUpdate>> = vec![
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 144 |     let vehicle_updates: Vec<Box<dyn VehicleUpdate>> = vec![
[INFO] [stderr]     |                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: `hanger_lane` (bin "main" test) generated 1 warning (run `cargo fix --bin "main" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/hanger_lane-363f0dfb85c26f8d)
[INFO] [stdout] 
[INFO] [stdout] running 56 tests
[INFO] [stdout] test city_map::tests::multiple_sources_same_group ... ok
[INFO] [stdout] test city_map::tests::test_add_destination ... ok
[INFO] [stdout] test city_map::tests::test_parse_road_double_wildcard ... ok
[INFO] [stdout] test city_map::tests::test_parse_map ... ok
[INFO] [stdout] test city_map::tests::test_parse_cell ... ok
[INFO] [stdout] test city_map::tests::test_parse_empty ... ok
[INFO] [stdout] test city::tests::test_with_all_roads ... ok
[INFO] [stdout] test city_map::tests::multiple_destinations_same_group ... ok
[INFO] [stdout] test city_map::tests::test_parse_destination ... ok
[INFO] [stdout] test city_map::tests::test_add_source ... ok
[INFO] [stdout] test city_map::tests::test_parse_road_entry_wildcard ... ok
[INFO] [stdout] test city::tests::test_create_edges ... ok
[INFO] [stdout] test city_map::tests::test_parse_traffic_light ... ok
[INFO] [stdout] test city_map::tests::test_parse_source ... ok
[INFO] [stdout] test city_map::tests::test_add_traffic_light ... ok
[INFO] [stdout] test city_map::tests::test_get_direction ... ok
[INFO] [stdout] test city::tests::test_forward ... ok
[INFO] [stdout] test city_map::tests::test_add_road ... ok
[INFO] [stdout] test city::tests::test_get_index_get_cell ... ok
[INFO] [stdout] test city_map::tests::test_create_city ... ok
[INFO] [stdout] test occupancy::tests::double_lock ... ok
[INFO] [stdout] test occupancy::tests::lock_then_unlock ... ok
[INFO] [stdout] test occupancy::tests::remove_all_locks ... ok
[INFO] [stdout] test occupancy::tests::lock ... ok
[INFO] [stdout] test city_map::tests::test_parse_road_exit_wildcard ... ok
[INFO] [stdout] test steps::block_occupier::tests::free_then_occupy_end_of_range ... ok
[INFO] [stdout] test city_map::tests::test_parse_road_simple ... ok
[INFO] [stdout] test city_map::tests::test_parse_row ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::all_the_way ... ok
[INFO] [stdout] test steps::block_occupier::tests::occupy_then_free_end_of_range ... ok
[INFO] [stdout] test steps::block_occupier::tests::should_not_occupy_destination ... ok
[INFO] [stdout] test steps::block_occupier::tests::free_then_occupy_mid_range ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::lookahead_required_for_obstruction ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::no_obstructions ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::multiple_destinations_no_obstructions ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::two_routes_a ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::goal_blocked ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::on_goal_adjacent_to_another_goal ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::on_goal ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::no_route ... ok
[INFO] [stdout] test steps::block_occupier::tests::occupy_then_free_start_of_range ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::lookahead_not_enough_for_obstruction ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::two_routes_b ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::position_blocked ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::should_not_go_onto_nodes_with_no_route_to_destination_even_with_obstruction ... ok
[INFO] [stdout] test steps::traffic_lights::tests::cycle_twice ... ok
[INFO] [stdout] test steps::block_occupier::tests::occupy_then_free_mid_range ... ok
[INFO] [stdout] test steps::traffic_lights::tests::should_initialise_with_first_cycle_unlocked ... ok
[INFO] [stdout] test steps::block_occupier::tests::free_then_occupy_start_of_range ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::adjacent_to_goal ... ok
[INFO] [stdout] test steps::traffic_lights::tests::cycle_once ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::full_lookahead_not_required_for_obstruction ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::should_not_go_onto_nodes_with_no_route_to_destination ... ok
[INFO] [stdout] test steps::lookahead_driver::tests::two_routes_c ... ok
[INFO] [stdout] test occupancy::tests::remove_too_many_locks - should panic ... ok
[INFO] [stdout] test city_map::tests::test_invalid_direction - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 56 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.25s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/main.rs (/opt/rustwide/target/debug/deps/main-217b98004851b42c)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests hanger_lane
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3b10b96edae287bef7680eea4d17974cc5dae2f4ae3ab3598fa51122a2751af0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b10b96edae287bef7680eea4d17974cc5dae2f4ae3ab3598fa51122a2751af0", kill_on_drop: false }`
[INFO] [stdout] 3b10b96edae287bef7680eea4d17974cc5dae2f4ae3ab3598fa51122a2751af0
[INFO] testing TGElder/hanger-lane against beta-2024-01-09 for beta-1.76-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTGElder%2Fhanger-lane" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TGElder/hanger-lane on toolchain beta-2024-01-09
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-01-09" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TGElder/hanger-lane
[INFO] finished tweaking git repo https://github.com/TGElder/hanger-lane
[INFO] tweaked toml for git repo https://github.com/TGElder/hanger-lane written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/TGElder/hanger-lane already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-01-09" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-01-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83e81c04a6824714eab0818d3ad8b639f3b0d9e783c1712b78dcc6df655d5154
[INFO] running `Command { std: "docker" "start" "-a" "83e81c04a6824714eab0818d3ad8b639f3b0d9e783c1712b78dcc6df655d5154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83e81c04a6824714eab0818d3ad8b639f3b0d9e783c1712b78dcc6df655d5154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83e81c04a6824714eab0818d3ad8b639f3b0d9e783c1712b78dcc6df655d5154", kill_on_drop: false }`
[INFO] [stdout] 83e81c04a6824714eab0818d3ad8b639f3b0d9e783c1712b78dcc6df655d5154
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-01-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1bde7b346425f852e4f6de31493b1ab512825775de440d5ddff92dde0ef80357
[INFO] running `Command { std: "docker" "start" "-a" "1bde7b346425f852e4f6de31493b1ab512825775de440d5ddff92dde0ef80357", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.102
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling dtoa v0.4.8
[INFO] [stderr]    Compiling serde v0.9.15
[INFO] [stderr]    Compiling itoa v0.3.4
[INFO] [stderr]    Compiling bitflags v0.9.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling khronos_api v2.2.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling xml-rs v0.6.1
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling piston-float v0.3.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]    Compiling wayland-scanner v0.9.10
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stdout] error[E0310]: the parameter type `T` may not live long enough
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/rustc-serialize-0.3.24/src/serialize.rs:1155:5
[INFO] [stdout]      |
[INFO] [stdout] 1155 |     fn decode<D: Decoder>(d: &mut D) -> Result<Cow<'static, T>, D::Error> {
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |     |
[INFO] [stdout]      |     the parameter type `T` must be valid for the static lifetime...
[INFO] [stdout]      |     ...so that the type `T` will meet its required lifetime bounds...
[INFO] [stdout]      |
[INFO] [stdout] note: ...that is required by this bound
[INFO] [stdout]     --> /rustc/650745ceb2ae60e04f8cd7bfb671fc37239533e4/library/alloc/src/borrow.rs:180:30
[INFO] [stdout] help: consider adding an explicit lifetime bound
[INFO] [stdout]      |
[INFO] [stdout] 1151 | impl<'a, T: ?Sized + 'static> Decodable for Cow<'a, T>
[INFO] [stdout]      |                    +++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling piston-viewport v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling fs2 v0.2.5
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0310`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling gl_generator v0.7.0
[INFO] [stderr] error: could not compile `rustc-serialize` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "1bde7b346425f852e4f6de31493b1ab512825775de440d5ddff92dde0ef80357", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bde7b346425f852e4f6de31493b1ab512825775de440d5ddff92dde0ef80357", kill_on_drop: false }`
[INFO] [stdout] 1bde7b346425f852e4f6de31493b1ab512825775de440d5ddff92dde0ef80357
