[INFO] cloning repository https://github.com/BoolPurist/advent_of_code_2023
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BoolPurist/advent_of_code_2023" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBoolPurist%2Fadvent_of_code_2023", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBoolPurist%2Fadvent_of_code_2023'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c797237444f2086d68e6e3c81e4e816c62ee9089
[INFO] checking BoolPurist/advent_of_code_2023 against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBoolPurist%2Fadvent_of_code_2023" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/BoolPurist/advent_of_code_2023
[INFO] finished tweaking git repo https://github.com/BoolPurist/advent_of_code_2023
[INFO] tweaked toml for git repo https://github.com/BoolPurist/advent_of_code_2023 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/BoolPurist/advent_of_code_2023 on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/BoolPurist/advent_of_code_2023 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 406d74dc058d2723f7eed0ccb0d021406b4c933aa41c8408089e0bbb8e8da29e
[INFO] running `Command { std: "docker" "start" "-a" "406d74dc058d2723f7eed0ccb0d021406b4c933aa41c8408089e0bbb8e8da29e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "406d74dc058d2723f7eed0ccb0d021406b4c933aa41c8408089e0bbb8e8da29e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "406d74dc058d2723f7eed0ccb0d021406b4c933aa41c8408089e0bbb8e8da29e", kill_on_drop: false }`
[INFO] [stdout] 406d74dc058d2723f7eed0ccb0d021406b4c933aa41c8408089e0bbb8e8da29e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad0f316a15c90a75ecc3504690ef3080ceb99a3d87449c143c4fd73882ff36d2
[INFO] running `Command { std: "docker" "start" "-a" "ad0f316a15c90a75ecc3504690ef3080ceb99a3d87449c143c4fd73882ff36d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.70
[INFO] [stderr]     Checking anstyle-query v1.0.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking anstyle v1.0.4
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]     Checking anstyle-parse v0.2.2
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking clap_lex v0.6.0
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]     Checking anstream v0.6.4
[INFO] [stderr]     Checking array2d v0.3.0
[INFO] [stderr]     Checking similar v2.3.0
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking clap_builder v4.4.9
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]     Checking console v0.15.7
[INFO] [stderr]     Checking insta v1.34.0
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling clap_derive v4.4.7
[INFO] [stderr]     Checking clap v4.4.10
[INFO] [stderr]     Checking advent_of_code_2023 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:33:25
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn go_left<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                         ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn go_left<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:40:26
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub fn go_right<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                          ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub fn go_right<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:49:23
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn go_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                       ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn go_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:56:25
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn go_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                         ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn go_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:65:28
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub fn go_left_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                            ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                            |
[INFO] [stdout]    |                            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub fn go_left_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:69:29
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn go_right_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                             ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn go_right_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:73:30
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn go_left_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                              ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                              |
[INFO] [stdout]    |                              the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn go_left_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:77:31
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn go_right_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                               ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                               |
[INFO] [stdout]    |                               the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn go_right_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:33:25
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn go_left<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                         ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn go_left<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:40:26
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub fn go_right<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                          ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub fn go_right<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:49:23
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn go_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                       ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn go_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:56:25
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn go_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                         ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn go_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:65:28
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub fn go_left_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                            ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                            |
[INFO] [stdout]    |                            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub fn go_left_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:69:29
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn go_right_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                             ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn go_right_up<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:73:30
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn go_left_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                              ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                              |
[INFO] [stdout]    |                              the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn go_left_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/grid_2d.rs:77:31
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn go_right_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<T> {
[INFO] [stdout]    |                               ^^^^^^^^^^^                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                               |
[INFO] [stdout]    |                               the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn go_right_down<T>(grid: &Array2D<T>, coords: Coords) -> MaybeNextCell<'_, T> {
[INFO] [stdout]    |                                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.33s
[INFO] running `Command { std: "docker" "inspect" "ad0f316a15c90a75ecc3504690ef3080ceb99a3d87449c143c4fd73882ff36d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad0f316a15c90a75ecc3504690ef3080ceb99a3d87449c143c4fd73882ff36d2", kill_on_drop: false }`
[INFO] [stdout] ad0f316a15c90a75ecc3504690ef3080ceb99a3d87449c143c4fd73882ff36d2
