[INFO] cloning repository https://github.com/camhux/burn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/camhux/burn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcamhux%2Fburn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcamhux%2Fburn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8c036de0baffd7fd13891018fc6ba9a7904058fc
[INFO] building camhux/burn against master#881c1ac408d93bb7adaa3a51dabab9266e82eee8 for issue-85264
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcamhux%2Fburn" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/camhux/burn on toolchain 881c1ac408d93bb7adaa3a51dabab9266e82eee8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/camhux/burn
[INFO] finished tweaking git repo https://github.com/camhux/burn
[INFO] tweaked toml for git repo https://github.com/camhux/burn written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/camhux/burn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48e45127a91ec8e890792658c2ce317ee1048106e163c8179444cab57fdae8d2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "48e45127a91ec8e890792658c2ce317ee1048106e163c8179444cab57fdae8d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48e45127a91ec8e890792658c2ce317ee1048106e163c8179444cab57fdae8d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48e45127a91ec8e890792658c2ce317ee1048106e163c8179444cab57fdae8d2", kill_on_drop: false }`
[INFO] [stdout] 48e45127a91ec8e890792658c2ce317ee1048106e163c8179444cab57fdae8d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be69c59869ca3f4292f512358dab7ad304d5108be08bd3e34f8e209ea1346048
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "be69c59869ca3f4292f512358dab7ad304d5108be08bd3e34f8e209ea1346048", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.34
[INFO] [stderr]    Compiling rand v0.3.18
[INFO] [stderr]    Compiling termion v1.5.1
[INFO] [stderr]    Compiling burn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `termion::raw::IntoRawMode`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use termion::raw::IntoRawMode;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `state::FireState`
[INFO] [stdout]  --> src/layers.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use state::FireState;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers.rs:59:40
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn composite(&self, layers: &[&Layerable]) -> Vec<Vec<u8>> {
[INFO] [stdout]    |                                        ^^^^^^^^^ help: use `dyn`: `dyn Layerable`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers.rs:78:53
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn intermediate_composite(&self, layers: &[&Layerable]) -> IntermediateLayer {
[INFO] [stdout]    |                                                     ^^^^^^^^^ help: use `dyn`: `dyn Layerable`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SmokeLayer`
[INFO] [stdout]  --> src/state/mod.rs:7:37
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::smoke_state::{SmokeState, SmokeLayer};
[INFO] [stdout]   |                                     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Layerable`
[INFO] [stdout]   --> src/main.rs:20:38
[INFO] [stdout]    |
[INFO] [stdout] 20 | use layers::{BasicLayer, Compositor, Layerable};
[INFO] [stdout]    |                                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `FireLayer`, `FireState`
[INFO] [stdout]   --> src/main.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 | use state::{FireState, FireLayer};
[INFO] [stdout]    |             ^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:46:34
[INFO] [stdout]    |
[INFO] [stdout] 46 |             println!("{}", error.description());
[INFO] [stdout]    |                                  ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `row`
[INFO] [stdout]   --> src/state/fire_state.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     row: usize,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `col`
[INFO] [stdout]   --> src/state/fire_state.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     col: usize,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fire_in_neighborhood`
[INFO] [stdout]   --> src/state/fire_state.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn fire_in_neighborhood(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `check_can_unlink_file`
[INFO] [stdout]    --> src/main.rs:129:4
[INFO] [stdout]     |
[INFO] [stdout] 129 | fn check_can_unlink_file(file: fs::File) -> Result<()> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> src/state/fire_state.rs:71:56
[INFO] [stdout]    |
[INFO] [stdout] 71 | ..., self.bottom, self.left].into_iter().filter(|&&cell| if let FireCell::Lit {..} = cell { true } else { false }).count()
[INFO] [stdout]    |                              ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.85s
[INFO] running `Command { std: "docker" "inspect" "be69c59869ca3f4292f512358dab7ad304d5108be08bd3e34f8e209ea1346048", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be69c59869ca3f4292f512358dab7ad304d5108be08bd3e34f8e209ea1346048", kill_on_drop: false }`
[INFO] [stdout] be69c59869ca3f4292f512358dab7ad304d5108be08bd3e34f8e209ea1346048
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 164cc62aaa99931c88687b2579625724bc2c2ad81ddb62830b11cf722916996d
[INFO] running `Command { std: "docker" "start" "-a" "164cc62aaa99931c88687b2579625724bc2c2ad81ddb62830b11cf722916996d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling burn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `termion::raw::IntoRawMode`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use termion::raw::IntoRawMode;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `state::FireState`
[INFO] [stdout]  --> src/layers.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use state::FireState;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers.rs:59:40
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn composite(&self, layers: &[&Layerable]) -> Vec<Vec<u8>> {
[INFO] [stdout]    |                                        ^^^^^^^^^ help: use `dyn`: `dyn Layerable`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers.rs:78:53
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn intermediate_composite(&self, layers: &[&Layerable]) -> IntermediateLayer {
[INFO] [stdout]    |                                                     ^^^^^^^^^ help: use `dyn`: `dyn Layerable`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SmokeLayer`
[INFO] [stdout]  --> src/state/mod.rs:7:37
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::smoke_state::{SmokeState, SmokeLayer};
[INFO] [stdout]   |                                     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Layerable`
[INFO] [stdout]   --> src/main.rs:20:38
[INFO] [stdout]    |
[INFO] [stdout] 20 | use layers::{BasicLayer, Compositor, Layerable};
[INFO] [stdout]    |                                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `FireLayer`, `FireState`
[INFO] [stdout]   --> src/main.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 | use state::{FireState, FireLayer};
[INFO] [stdout]    |             ^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:46:34
[INFO] [stdout]    |
[INFO] [stdout] 46 |             println!("{}", error.description());
[INFO] [stdout]    |                                  ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'array_map'
[INFO] [stdout]    --> src/layers.rs:116:24
[INFO] [stdout]     |
[INFO] [stdout] 116 |             b"bonjour".map(|&x| Some(x)).collect(),
[INFO] [stdout]     |                        ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #75243 <https://github.com/rust-lang/rust/issues/75243> for more information
[INFO] [stdout]     = help: add `#![feature(array_map)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/layers.rs:116:29
[INFO] [stdout]     |
[INFO] [stdout] 116 |             b"bonjour".map(|&x| Some(x)).collect(),
[INFO] [stdout]     |                             ^--
[INFO] [stdout]     |                             ||
[INFO] [stdout]     |                             |expected due to this
[INFO] [stdout]     |                             expected `u8`, found reference
[INFO] [stdout]     |                             help: did you mean `x`: `&u8`
[INFO] [stdout]     |
[INFO] [stdout]     = note:   expected type `u8`
[INFO] [stdout]             found reference `&_`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: the method `collect` exists for array `[Option<_>; 7]`, but its trait bounds were not satisfied
[INFO] [stdout]    --> src/layers.rs:116:42
[INFO] [stdout]     |
[INFO] [stdout] 116 |             b"bonjour".map(|&x| Some(x)).collect(),
[INFO] [stdout]     |                                          ^^^^^^^ method cannot be called on `[Option<_>; 7]` due to unsatisfied trait bounds
[INFO] [stdout]     |
[INFO] [stdout]     = note: the following trait bounds were not satisfied:
[INFO] [stdout]             `[Option<_>; 7]: Iterator`
[INFO] [stdout]             which is required by `&mut [Option<_>; 7]: Iterator`
[INFO] [stdout]             `[Option<_>]: Iterator`
[INFO] [stdout]             which is required by `&mut [Option<_>]: Iterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'array_map'
[INFO] [stdout]    --> src/layers.rs:117:21
[INFO] [stdout]     |
[INFO] [stdout] 117 |             b"allo".map(|&x| Some(x)).collect(),
[INFO] [stdout]     |                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #75243 <https://github.com/rust-lang/rust/issues/75243> for more information
[INFO] [stdout]     = help: add `#![feature(array_map)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/layers.rs:117:26
[INFO] [stdout]     |
[INFO] [stdout] 117 |             b"allo".map(|&x| Some(x)).collect(),
[INFO] [stdout]     |                          ^--
[INFO] [stdout]     |                          ||
[INFO] [stdout]     |                          |expected due to this
[INFO] [stdout]     |                          expected `u8`, found reference
[INFO] [stdout]     |                          help: did you mean `x`: `&u8`
[INFO] [stdout]     |
[INFO] [stdout]     = note:   expected type `u8`
[INFO] [stdout]             found reference `&_`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: the method `collect` exists for array `[Option<_>; 4]`, but its trait bounds were not satisfied
[INFO] [stdout]    --> src/layers.rs:117:39
[INFO] [stdout]     |
[INFO] [stdout] 117 |             b"allo".map(|&x| Some(x)).collect(),
[INFO] [stdout]     |                                       ^^^^^^^ method cannot be called on `[Option<_>; 4]` due to unsatisfied trait bounds
[INFO] [stdout]     |
[INFO] [stdout]     = note: the following trait bounds were not satisfied:
[INFO] [stdout]             `[Option<_>; 4]: Iterator`
[INFO] [stdout]             which is required by `&mut [Option<_>; 4]: Iterator`
[INFO] [stdout]             `[Option<_>]: Iterator`
[INFO] [stdout]             which is required by `&mut [Option<_>]: Iterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/layers.rs:121:13
[INFO] [stdout]     |
[INFO] [stdout] 121 |             features,
[INFO] [stdout]     |             ^^^^^^^^ expected struct `String`, found `u8`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Vec<Vec<Option<String>>>`
[INFO] [stdout]                found struct `Vec<Vec<Option<u8>>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/layers.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |         assert_eq!(layer.get(0, 2), Some(b'n'));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `String`, found `u8`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected enum `Option<String>`
[INFO] [stdout]                found enum `Option<u8>`
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/layers.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |         assert_eq!(layer.get(1, 0), Some(b'a'));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `String`, found `u8`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected enum `Option<String>`
[INFO] [stdout]                found enum `Option<u8>`
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/state/fire_state.rs:220:90
[INFO] [stdout]     |
[INFO] [stdout] 220 |         let fire_cell_count = last_row.into_iter().fold(0, |acc, &mut cell| match cell { Some(_) => acc + 1, None => acc });
[INFO] [stdout]     |                                                                                   ----   ^^^^^^^ expected enum `FireCell`, found enum `Option`
[INFO] [stdout]     |                                                                                   |
[INFO] [stdout]     |                                                                                   this expression has type `FireCell`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected enum `FireCell`
[INFO] [stdout]                found enum `Option<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/state/fire_state.rs:220:110
[INFO] [stdout]     |
[INFO] [stdout] 220 |         let fire_cell_count = last_row.into_iter().fold(0, |acc, &mut cell| match cell { Some(_) => acc + 1, None => acc });
[INFO] [stdout]     |                                                                                   ----                       ^^^^ expected enum `FireCell`, found enum `Option`
[INFO] [stdout]     |                                                                                   |
[INFO] [stdout]     |                                                                                   this expression has type `FireCell`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected enum `FireCell`
[INFO] [stdout]                found enum `Option<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 11 previous errors; 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `burn`
[INFO] [stdout] Some errors have detailed explanations: E0308, E0599, E0658.
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "164cc62aaa99931c88687b2579625724bc2c2ad81ddb62830b11cf722916996d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "164cc62aaa99931c88687b2579625724bc2c2ad81ddb62830b11cf722916996d", kill_on_drop: false }`
[INFO] [stdout] 164cc62aaa99931c88687b2579625724bc2c2ad81ddb62830b11cf722916996d
