[INFO] cloning repository https://github.com/jmacmahon/advent-of-code-2016
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jmacmahon/advent-of-code-2016" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmacmahon%2Fadvent-of-code-2016", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmacmahon%2Fadvent-of-code-2016'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 065b54ffec30020f9242161531bbf4fe438bb8c4
[INFO] checking jmacmahon/advent-of-code-2016 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmacmahon%2Fadvent-of-code-2016" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jmacmahon/advent-of-code-2016 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jmacmahon/advent-of-code-2016
[INFO] finished tweaking git repo https://github.com/jmacmahon/advent-of-code-2016
[INFO] tweaked toml for git repo https://github.com/jmacmahon/advent-of-code-2016 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jmacmahon/advent-of-code-2016 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 00e37220791b5460164d4920ba6ab5b0d88bdea694129bc74c357b94663bcc99
[INFO] running `Command { std: "docker" "start" "-a" "00e37220791b5460164d4920ba6ab5b0d88bdea694129bc74c357b94663bcc99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00e37220791b5460164d4920ba6ab5b0d88bdea694129bc74c357b94663bcc99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00e37220791b5460164d4920ba6ab5b0d88bdea694129bc74c357b94663bcc99", kill_on_drop: false }`
[INFO] [stdout] 00e37220791b5460164d4920ba6ab5b0d88bdea694129bc74c357b94663bcc99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a7a6ff8a4dc65b19ec8bce43754c9b759176da379bcde5658bc7719e26baf1d
[INFO] running `Command { std: "docker" "start" "-a" "5a7a6ff8a4dc65b19ec8bce43754c9b759176da379bcde5658bc7719e26baf1d", kill_on_drop: false }`
[INFO] [stderr]     Checking advent-of-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/util/mod.rs:5:52
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn read_file(path: &str) -> Result<String, Box<Error>> {
[INFO] [stdout]   |                                                    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn read_file(path: &str) -> Result<String, Box<dyn Error>> {
[INFO] [stdout]   |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/day03/mod.rs:3:51
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn parse_line(line: &str) -> Result<Vec<u32>, Box<Error>> {
[INFO] [stdout]   |                                                   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn parse_line(line: &str) -> Result<Vec<u32>, Box<dyn Error>> {
[INFO] [stdout]   |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:28:41
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn main_result() -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn main_result() -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:38:57
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn parse_and_verify(line: &str) -> Result<bool, Box<Error>> {
[INFO] [stdout]    |                                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn parse_and_verify(line: &str) -> Result<bool, Box<dyn Error>> {
[INFO] [stdout]    |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:57:41
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn main_result() -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn main_result() -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:74:64
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn count_three_lines(lines: &Vec<&str>) -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                                                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn count_three_lines(lines: &Vec<&str>) -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:95:72
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn get_three_lines<'a, T>(mut iter: T) -> Result<Vec<&'a str>, Box<Error>>
[INFO] [stdout]    |                                                                        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn get_three_lines<'a, T>(mut iter: T) -> Result<Vec<&'a str>, Box<dyn Error>>
[INFO] [stdout]    |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day04/mod.rs:10:51
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn parse_line(line: &str) -> Result<Room, Box<Error>> {
[INFO] [stdout]    |                                                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn parse_line(line: &str) -> Result<Room, Box<dyn Error>> {
[INFO] [stdout]    |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day04/mod.rs:35:39
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn main_error() -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                       ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn main_error() -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/util/mod.rs:5:52
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn read_file(path: &str) -> Result<String, Box<Error>> {
[INFO] [stdout]   |                                                    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn read_file(path: &str) -> Result<String, Box<dyn Error>> {
[INFO] [stdout]   |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/day03/mod.rs:3:51
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn parse_line(line: &str) -> Result<Vec<u32>, Box<Error>> {
[INFO] [stdout]   |                                                   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn parse_line(line: &str) -> Result<Vec<u32>, Box<dyn Error>> {
[INFO] [stdout]   |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:28:41
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn main_result() -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn main_result() -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:38:57
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn parse_and_verify(line: &str) -> Result<bool, Box<Error>> {
[INFO] [stdout]    |                                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn parse_and_verify(line: &str) -> Result<bool, Box<dyn Error>> {
[INFO] [stdout]    |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:57:41
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn main_result() -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn main_result() -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:74:64
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn count_three_lines(lines: &Vec<&str>) -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                                                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn count_three_lines(lines: &Vec<&str>) -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:95:72
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn get_three_lines<'a, T>(mut iter: T) -> Result<Vec<&'a str>, Box<Error>>
[INFO] [stdout]    |                                                                        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn get_three_lines<'a, T>(mut iter: T) -> Result<Vec<&'a str>, Box<dyn Error>>
[INFO] [stdout]    |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day04/mod.rs:10:51
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn parse_line(line: &str) -> Result<Room, Box<Error>> {
[INFO] [stdout]    |                                                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn parse_line(line: &str) -> Result<Room, Box<dyn Error>> {
[INFO] [stdout]    |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day04/mod.rs:35:39
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn main_error() -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                       ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn main_error() -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INPUT` is never used
[INFO] [stdout]  --> src/day01/mod.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const INPUT: &'static str = "R2, L3, R2, R4, L2, L1, R2, R4, R1, L4, L5, R5, R5, R2, R2, R1, L2, L3, L2, L1, R3, L5, R187, R1, R4, L1, R5...
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]  --> src/day01/mod.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum Direction { L, R }
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Step` is never constructed
[INFO] [stdout]   --> src/day01/mod.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Step {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CompassPoint` is never used
[INFO] [stdout]   --> src/day01/mod.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum CompassPoint { N, E, S, W }
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Position` is never constructed
[INFO] [stdout]   --> src/day01/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Position  {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/day01/mod.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `apply_to_position` is never used
[INFO] [stdout]   --> src/day01/mod.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn apply_to_position(position: &mut Position, step: &Step) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_step` is never used
[INFO] [stdout]   --> src/day01/mod.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn parse_step(step_str: &str) -> Option<Step> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INPUT` is never used
[INFO] [stdout]  --> src/day02/mod.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const INPUT: &'static [&'static str] = &[
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INDEX` is never used
[INFO] [stdout]   --> src/day02/mod.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const INDEX: usize = 1;
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYPAD` is never used
[INFO] [stdout]   --> src/day02/mod.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const KEYPAD: [[char; 5]; 5] = [
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/day02/mod.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_next_button_part2` is never used
[INFO] [stdout]   --> src/day02/mod.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn get_next_button_part2(pos: &mut (usize, usize), line: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INPUT` is never used
[INFO] [stdout]  --> src/day01/mod.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const INPUT: &'static str = "R2, L3, R2, R4, L2, L1, R2, R4, R1, L4, L5, R5, R5, R2, R2, R1, L2, L3, L2, L1, R3, L5, R187, R1, R4, L1, R5...
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]  --> src/day01/mod.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum Direction { L, R }
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Step` is never constructed
[INFO] [stdout]   --> src/day01/mod.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Step {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CompassPoint` is never used
[INFO] [stdout]   --> src/day01/mod.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum CompassPoint { N, E, S, W }
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Position` is never constructed
[INFO] [stdout]   --> src/day01/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Position  {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/day01/mod.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `apply_to_position` is never used
[INFO] [stdout]   --> src/day01/mod.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn apply_to_position(position: &mut Position, step: &Step) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_step` is never used
[INFO] [stdout]   --> src/day01/mod.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn parse_step(step_str: &str) -> Option<Step> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INPUT` is never used
[INFO] [stdout]  --> src/day02/mod.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const INPUT: &'static [&'static str] = &[
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INDEX` is never used
[INFO] [stdout]   --> src/day02/mod.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const INDEX: usize = 1;
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYPAD` is never used
[INFO] [stdout]   --> src/day02/mod.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const KEYPAD: [[char; 5]; 5] = [
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/day02/mod.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_next_button_part2` is never used
[INFO] [stdout]   --> src/day02/mod.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn get_next_button_part2(pos: &mut (usize, usize), line: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "5a7a6ff8a4dc65b19ec8bce43754c9b759176da379bcde5658bc7719e26baf1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a7a6ff8a4dc65b19ec8bce43754c9b759176da379bcde5658bc7719e26baf1d", kill_on_drop: false }`
[INFO] [stdout] 5a7a6ff8a4dc65b19ec8bce43754c9b759176da379bcde5658bc7719e26baf1d
[INFO] checking jmacmahon/advent-of-code-2016 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmacmahon%2Fadvent-of-code-2016" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jmacmahon/advent-of-code-2016 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jmacmahon/advent-of-code-2016
[INFO] finished tweaking git repo https://github.com/jmacmahon/advent-of-code-2016
[INFO] tweaked toml for git repo https://github.com/jmacmahon/advent-of-code-2016 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/jmacmahon/advent-of-code-2016 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 253856aa8f52a13d5303b599909758b51c2de222aabc9dbb6eb4a05093d8f9f0
[INFO] running `Command { std: "docker" "start" "-a" "253856aa8f52a13d5303b599909758b51c2de222aabc9dbb6eb4a05093d8f9f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "253856aa8f52a13d5303b599909758b51c2de222aabc9dbb6eb4a05093d8f9f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "253856aa8f52a13d5303b599909758b51c2de222aabc9dbb6eb4a05093d8f9f0", kill_on_drop: false }`
[INFO] [stdout] 253856aa8f52a13d5303b599909758b51c2de222aabc9dbb6eb4a05093d8f9f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2e16d69efc5b2dccddcdd2c3bc7d1a642d3ee1fda34438a94792e4532109601
[INFO] running `Command { std: "docker" "start" "-a" "d2e16d69efc5b2dccddcdd2c3bc7d1a642d3ee1fda34438a94792e4532109601", kill_on_drop: false }`
[INFO] [stderr]     Checking advent-of-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/util/mod.rs:5:52
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn read_file(path: &str) -> Result<String, Box<Error>> {
[INFO] [stdout]   |                                                    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn read_file(path: &str) -> Result<String, Box<dyn Error>> {
[INFO] [stdout]   |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/day03/mod.rs:3:51
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn parse_line(line: &str) -> Result<Vec<u32>, Box<Error>> {
[INFO] [stdout]   |                                                   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn parse_line(line: &str) -> Result<Vec<u32>, Box<dyn Error>> {
[INFO] [stdout]   |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:28:41
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn main_result() -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn main_result() -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:38:57
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn parse_and_verify(line: &str) -> Result<bool, Box<Error>> {
[INFO] [stdout]    |                                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn parse_and_verify(line: &str) -> Result<bool, Box<dyn Error>> {
[INFO] [stdout]    |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:57:41
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn main_result() -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn main_result() -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:74:64
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn count_three_lines(lines: &Vec<&str>) -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                                                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn count_three_lines(lines: &Vec<&str>) -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:95:72
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn get_three_lines<'a, T>(mut iter: T) -> Result<Vec<&'a str>, Box<Error>>
[INFO] [stdout]    |                                                                        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn get_three_lines<'a, T>(mut iter: T) -> Result<Vec<&'a str>, Box<dyn Error>>
[INFO] [stdout]    |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day04/mod.rs:10:51
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn parse_line(line: &str) -> Result<Room, Box<Error>> {
[INFO] [stdout]    |                                                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn parse_line(line: &str) -> Result<Room, Box<dyn Error>> {
[INFO] [stdout]    |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day04/mod.rs:35:39
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn main_error() -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                       ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn main_error() -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/util/mod.rs:5:52
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn read_file(path: &str) -> Result<String, Box<Error>> {
[INFO] [stdout]   |                                                    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn read_file(path: &str) -> Result<String, Box<dyn Error>> {
[INFO] [stdout]   |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/day03/mod.rs:3:51
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn parse_line(line: &str) -> Result<Vec<u32>, Box<Error>> {
[INFO] [stdout]   |                                                   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn parse_line(line: &str) -> Result<Vec<u32>, Box<dyn Error>> {
[INFO] [stdout]   |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:28:41
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn main_result() -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn main_result() -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:38:57
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn parse_and_verify(line: &str) -> Result<bool, Box<Error>> {
[INFO] [stdout]    |                                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn parse_and_verify(line: &str) -> Result<bool, Box<dyn Error>> {
[INFO] [stdout]    |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:57:41
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn main_result() -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn main_result() -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:74:64
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn count_three_lines(lines: &Vec<&str>) -> Result<u32, Box<Error>> {
[INFO] [stdout]    |                                                                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn count_three_lines(lines: &Vec<&str>) -> Result<u32, Box<dyn Error>> {
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day03/mod.rs:95:72
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn get_three_lines<'a, T>(mut iter: T) -> Result<Vec<&'a str>, Box<Error>>
[INFO] [stdout]    |                                                                        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn get_three_lines<'a, T>(mut iter: T) -> Result<Vec<&'a str>, Box<dyn Error>>
[INFO] [stdout]    |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day04/mod.rs:10:51
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn parse_line(line: &str) -> Result<Room, Box<Error>> {
[INFO] [stdout]    |                                                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn parse_line(line: &str) -> Result<Room, Box<dyn Error>> {
[INFO] [stdout]    |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/day04/mod.rs:35:39
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn main_error() -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                       ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn main_error() -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INPUT` is never used
[INFO] [stdout]  --> src/day01/mod.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const INPUT: &'static str = "R2, L3, R2, R4, L2, L1, R2, R4, R1, L4, L5, R5, R5, R2, R2, R1, L2, L3, L2, L1, R3, L5, R187, R1, R4, L1, R5...
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]  --> src/day01/mod.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum Direction { L, R }
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Step` is never constructed
[INFO] [stdout]   --> src/day01/mod.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Step {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CompassPoint` is never used
[INFO] [stdout]   --> src/day01/mod.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum CompassPoint { N, E, S, W }
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Position` is never constructed
[INFO] [stdout]   --> src/day01/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Position  {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/day01/mod.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `apply_to_position` is never used
[INFO] [stdout]   --> src/day01/mod.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn apply_to_position(position: &mut Position, step: &Step) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_step` is never used
[INFO] [stdout]   --> src/day01/mod.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn parse_step(step_str: &str) -> Option<Step> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INPUT` is never used
[INFO] [stdout]  --> src/day02/mod.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const INPUT: &'static [&'static str] = &[
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INDEX` is never used
[INFO] [stdout]   --> src/day02/mod.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const INDEX: usize = 1;
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYPAD` is never used
[INFO] [stdout]   --> src/day02/mod.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const KEYPAD: [[char; 5]; 5] = [
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/day02/mod.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_next_button_part2` is never used
[INFO] [stdout]   --> src/day02/mod.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn get_next_button_part2(pos: &mut (usize, usize), line: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INPUT` is never used
[INFO] [stdout]  --> src/day01/mod.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const INPUT: &'static str = "R2, L3, R2, R4, L2, L1, R2, R4, R1, L4, L5, R5, R5, R2, R2, R1, L2, L3, L2, L1, R3, L5, R187, R1, R4, L1, R5...
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]  --> src/day01/mod.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum Direction { L, R }
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Step` is never constructed
[INFO] [stdout]   --> src/day01/mod.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Step {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CompassPoint` is never used
[INFO] [stdout]   --> src/day01/mod.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum CompassPoint { N, E, S, W }
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Position` is never constructed
[INFO] [stdout]   --> src/day01/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Position  {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/day01/mod.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `apply_to_position` is never used
[INFO] [stdout]   --> src/day01/mod.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn apply_to_position(position: &mut Position, step: &Step) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_step` is never used
[INFO] [stdout]   --> src/day01/mod.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn parse_step(step_str: &str) -> Option<Step> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INPUT` is never used
[INFO] [stdout]  --> src/day02/mod.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const INPUT: &'static [&'static str] = &[
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INDEX` is never used
[INFO] [stdout]   --> src/day02/mod.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const INDEX: usize = 1;
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYPAD` is never used
[INFO] [stdout]   --> src/day02/mod.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const KEYPAD: [[char; 5]; 5] = [
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/day02/mod.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_next_button_part2` is never used
[INFO] [stdout]   --> src/day02/mod.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn get_next_button_part2(pos: &mut (usize, usize), line: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "d2e16d69efc5b2dccddcdd2c3bc7d1a642d3ee1fda34438a94792e4532109601", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2e16d69efc5b2dccddcdd2c3bc7d1a642d3ee1fda34438a94792e4532109601", kill_on_drop: false }`
[INFO] [stdout] d2e16d69efc5b2dccddcdd2c3bc7d1a642d3ee1fda34438a94792e4532109601