[INFO] cloning repository https://github.com/neoeinstein/advent-of-code-2019
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/neoeinstein/advent-of-code-2019" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneoeinstein%2Fadvent-of-code-2019", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneoeinstein%2Fadvent-of-code-2019'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ab1f91284b8b68ea1220674b17f0e1764869820
[INFO] checking neoeinstein/advent-of-code-2019 against 895980e0290783bb09b1ccf1b11f14eb09b10430 for pr-160186
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneoeinstein%2Fadvent-of-code-2019" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/neoeinstein/advent-of-code-2019
[INFO] finished tweaking git repo https://github.com/neoeinstein/advent-of-code-2019
[INFO] tweaked toml for git repo https://github.com/neoeinstein/advent-of-code-2019 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/neoeinstein/advent-of-code-2019 on toolchain 895980e0290783bb09b1ccf1b11f14eb09b10430
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/neoeinstein/advent-of-code-2019 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" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] a80c994af5658ac17d48a554dedb043321edc4ead4ec1044e0262c732d065c12
[INFO] running `Command { std: "docker" "start" "a80c994af5658ac17d48a554dedb043321edc4ead4ec1044e0262c732d065c12", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a80c994af5658ac17d48a554dedb043321edc4ead4ec1044e0262c732d065c12" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a80c994af5658ac17d48a554dedb043321edc4ead4ec1044e0262c732d065c12", kill_on_drop: false }`
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[INFO] [stderr]     Checking intcode v0.1.0 (/opt/rustwide/workdir/intcode)
[INFO] [stdout] warning: struct `UnaryOperands` is never constructed
[INFO] [stdout]    --> intcode/src/decode.rs:193:12
[INFO] [stdout]     |
[INFO] [stdout] 193 | pub struct UnaryOperands {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking advent-of-code-2019 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/day04.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     (values[0]..=values[1])
[INFO] [stdout]    |     ^                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 53 -     (values[0]..=values[1])
[INFO] [stdout] 53 +     values[0]..=values[1]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::core_reexport::num::<impl u32>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/day08.rs:148:36
[INFO] [stdout]     |
[INFO] [stdout] 148 |         let mut best_layer = [u32::max_value(); 3];
[INFO] [stdout]     |                                    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::core_reexport::num::<impl i64>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/day11.rs:300:36
[INFO] [stdout]     |
[INFO] [stdout] 300 |     let min = Position2D::new(i64::max_value(), i64::max_value());
[INFO] [stdout]     |                                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::core_reexport::num::<impl i64>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/day11.rs:300:54
[INFO] [stdout]     |
[INFO] [stdout] 300 |     let min = Position2D::new(i64::max_value(), i64::max_value());
[INFO] [stdout]     |                                                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::core_reexport::num::<impl i64>::min_value`: replaced by the `MIN` associated constant on this type
[INFO] [stdout]    --> src/day11.rs:301:36
[INFO] [stdout]     |
[INFO] [stdout] 301 |     let max = Position2D::new(i64::min_value(), i64::min_value());
[INFO] [stdout]     |                                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::core_reexport::num::<impl i64>::min_value`: replaced by the `MIN` associated constant on this type
[INFO] [stdout]    --> src/day11.rs:301:54
[INFO] [stdout]     |
[INFO] [stdout] 301 |     let max = Position2D::new(i64::min_value(), i64::min_value());
[INFO] [stdout]     |                                                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/day04.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     (values[0]..=values[1])
[INFO] [stdout]    |     ^                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 53 -     (values[0]..=values[1])
[INFO] [stdout] 53 +     values[0]..=values[1]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/day03.rs:210:17
[INFO] [stdout]     |
[INFO] [stdout] 210 |     BadDistance(std::num::ParseIntError),
[INFO] [stdout]     |     ----------- ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `InvalidDirective` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 210 -     BadDistance(std::num::ParseIntError),
[INFO] [stdout] 210 +     BadDistance(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Path` is never constructed
[INFO] [stdout]    --> src/day18.rs:778:8
[INFO] [stdout]     |
[INFO] [stdout] 778 | struct Path {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/day06.rs:283:17
[INFO] [stdout]     |
[INFO] [stdout] 283 |                 std::mem::replace(&mut current, n);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 283 |                 let _ = std::mem::replace(&mut current, n);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day08.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn layer_at(&self, start: usize) -> Layer {
[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] 121 |     fn layer_at(&self, start: usize) -> Layer<'_> {
[INFO] [stdout]     |                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day08.rs:134:19
[INFO] [stdout]     |
[INFO] [stdout] 134 |     pub fn layers(&self) -> LayerIterator {
[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] 134 |     pub fn layers(&self) -> LayerIterator<'_> {
[INFO] [stdout]     |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day08.rs:142:14
[INFO] [stdout]     |
[INFO] [stdout] 142 |     fn layer(&self, idx: usize) -> Layer {
[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] 142 |     fn layer(&self, idx: usize) -> Layer<'_> {
[INFO] [stdout]     |                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day08.rs:161:20
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn resolve(&self) -> Layer {
[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] 161 |     pub fn resolve(&self) -> Layer<'_> {
[INFO] [stdout]     |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day08.rs:173:25
[INFO] [stdout]     |
[INFO] [stdout] 173 |     pub fn resolve_back(&self) -> Layer {
[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] 173 |     pub fn resolve_back(&self) -> Layer<'_> {
[INFO] [stdout]     |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/grid.rs:56:22
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn enumerate(&self) -> GridIterator<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 enumerate(&self) -> GridIterator<'_, T> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/grid.rs:68:19
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn column(&self, column: usize) -> ColumnIterator<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] 68 |     pub fn column(&self, column: usize) -> ColumnIterator<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/grid.rs:72:16
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn row(&self, row: usize) -> RowIterator<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] 72 |     pub fn row(&self, row: usize) -> RowIterator<'_, T> {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/grid.rs:76:22
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn neighbors(&self, position: GridPosition) -> NeighborIterator<T> {
[INFO] [stdout]    |                      ^^^^^ the lifetime is elided here ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden 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] 76 |     pub fn neighbors(&self, position: GridPosition) -> NeighborIterator<'_, T> {
[INFO] [stdout]    |                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UnaryOperands` is never constructed
[INFO] [stdout]    --> intcode/src/decode.rs:193:12
[INFO] [stdout]     |
[INFO] [stdout] 193 | pub struct UnaryOperands {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::core_reexport::num::<impl u32>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/day08.rs:148:36
[INFO] [stdout]     |
[INFO] [stdout] 148 |         let mut best_layer = [u32::max_value(); 3];
[INFO] [stdout]     |                                    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::core_reexport::num::<impl isize>::min_value`: replaced by the `MIN` associated constant on this type
[INFO] [stdout]    --> src/day10.rs:906:50
[INFO] [stdout]     |
[INFO] [stdout] 906 |         const MAX: Slope = Slope::new(-1, isize::min_value() / 3);
[INFO] [stdout]     |                                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::core_reexport::num::<impl i64>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/day11.rs:300:36
[INFO] [stdout]     |
[INFO] [stdout] 300 |     let min = Position2D::new(i64::max_value(), i64::max_value());
[INFO] [stdout]     |                                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::core_reexport::num::<impl i64>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/day11.rs:300:54
[INFO] [stdout]     |
[INFO] [stdout] 300 |     let min = Position2D::new(i64::max_value(), i64::max_value());
[INFO] [stdout]     |                                                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::core_reexport::num::<impl i64>::min_value`: replaced by the `MIN` associated constant on this type
[INFO] [stdout]    --> src/day11.rs:301:36
[INFO] [stdout]     |
[INFO] [stdout] 301 |     let max = Position2D::new(i64::min_value(), i64::min_value());
[INFO] [stdout]     |                                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::core_reexport::num::<impl i64>::min_value`: replaced by the `MIN` associated constant on this type
[INFO] [stdout]    --> src/day11.rs:301:54
[INFO] [stdout]     |
[INFO] [stdout] 301 |     let max = Position2D::new(i64::min_value(), i64::min_value());
[INFO] [stdout]     |                                                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/day03.rs:210:17
[INFO] [stdout]     |
[INFO] [stdout] 210 |     BadDistance(std::num::ParseIntError),
[INFO] [stdout]     |     ----------- ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `InvalidDirective` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 210 -     BadDistance(std::num::ParseIntError),
[INFO] [stdout] 210 +     BadDistance(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Path` is never constructed
[INFO] [stdout]    --> src/day18.rs:778:8
[INFO] [stdout]     |
[INFO] [stdout] 778 | struct Path {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/day06.rs:283:17
[INFO] [stdout]     |
[INFO] [stdout] 283 |                 std::mem::replace(&mut current, n);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 283 |                 let _ = std::mem::replace(&mut current, n);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day08.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn layer_at(&self, start: usize) -> Layer {
[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] 121 |     fn layer_at(&self, start: usize) -> Layer<'_> {
[INFO] [stdout]     |                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day08.rs:134:19
[INFO] [stdout]     |
[INFO] [stdout] 134 |     pub fn layers(&self) -> LayerIterator {
[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] 134 |     pub fn layers(&self) -> LayerIterator<'_> {
[INFO] [stdout]     |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day08.rs:142:14
[INFO] [stdout]     |
[INFO] [stdout] 142 |     fn layer(&self, idx: usize) -> Layer {
[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] 142 |     fn layer(&self, idx: usize) -> Layer<'_> {
[INFO] [stdout]     |                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day08.rs:161:20
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn resolve(&self) -> Layer {
[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] 161 |     pub fn resolve(&self) -> Layer<'_> {
[INFO] [stdout]     |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day08.rs:173:25
[INFO] [stdout]     |
[INFO] [stdout] 173 |     pub fn resolve_back(&self) -> Layer {
[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] 173 |     pub fn resolve_back(&self) -> Layer<'_> {
[INFO] [stdout]     |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/grid.rs:56:22
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn enumerate(&self) -> GridIterator<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 enumerate(&self) -> GridIterator<'_, T> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/grid.rs:68:19
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn column(&self, column: usize) -> ColumnIterator<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] 68 |     pub fn column(&self, column: usize) -> ColumnIterator<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/grid.rs:72:16
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn row(&self, row: usize) -> RowIterator<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] 72 |     pub fn row(&self, row: usize) -> RowIterator<'_, T> {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/grid.rs:76:22
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn neighbors(&self, position: GridPosition) -> NeighborIterator<T> {
[INFO] [stdout]    |                      ^^^^^ the lifetime is elided here ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden 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] 76 |     pub fn neighbors(&self, position: GridPosition) -> NeighborIterator<'_, T> {
[INFO] [stdout]    |                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: unused dependency `num-bigint`
[INFO] [stderr]   --> Cargo.toml:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | num-bigint = "0.2"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `num-bigint`
[INFO] [stderr] warning: `advent-of-code-2019` (manifest) generated 1 warning
[INFO] [stderr] warning: unused dependency `static_assertions`
[INFO] [stderr]   --> intcode/Cargo.toml:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | static_assertions = "1.1"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `static_assertions`
[INFO] [stderr] warning: `intcode` (manifest) generated 1 warning
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.78s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 14`
[INFO] running `Command { std: "docker" "inspect" "a80c994af5658ac17d48a554dedb043321edc4ead4ec1044e0262c732d065c12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a80c994af5658ac17d48a554dedb043321edc4ead4ec1044e0262c732d065c12", kill_on_drop: false }`
[INFO] [stdout] a80c994af5658ac17d48a554dedb043321edc4ead4ec1044e0262c732d065c12
