[INFO] fetching crate rail 0.3.1...
[INFO] checking rail-0.3.1 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate rail 0.3.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate rail 0.3.1 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rail 0.3.1
[INFO] finished tweaking crates.io crate rail 0.3.1
[INFO] tweaked toml for crates.io crate rail 0.3.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c648ac2b9bb4db054367c53151058032506b9a5ca47070a709c9bafce063aa8
[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" "2c648ac2b9bb4db054367c53151058032506b9a5ca47070a709c9bafce063aa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c648ac2b9bb4db054367c53151058032506b9a5ca47070a709c9bafce063aa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c648ac2b9bb4db054367c53151058032506b9a5ca47070a709c9bafce063aa8", kill_on_drop: false }`
[INFO] [stdout] 2c648ac2b9bb4db054367c53151058032506b9a5ca47070a709c9bafce063aa8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 241f9210fb6720fa412520272e47afe968cdf2127697c3d78f90069990e184ef
[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" "241f9210fb6720fa412520272e47afe968cdf2127697c3d78f90069990e184ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling syn v1.0.56
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling arrayfire v3.7.2
[INFO] [stderr]     Checking rail v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `arrayfire::print_gen`
[INFO] [stdout]   --> src/utils.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     use arrayfire::print_gen;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/functions/loss.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub type LossFuntion = Fn(&Matrix, &Matrix) -> f64;
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Matrix, &Matrix) -> f64`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/functions/loss.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub type DLossFuntion = Fn(&Matrix, &Matrix) -> Matrix;
[INFO] [stdout]   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Matrix, &Matrix) -> Matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/functions/loss.rs:4:33
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub type LossFuntionGenerator = Fn() -> (Box<LossFuntion>, Box<DLossFuntion>);
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> (Box<LossFuntion>, Box<DLossFuntion>)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `print_gen`
[INFO] [stdout]  --> src/layers/dense.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     print_gen
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers/dense.rs:18:21
[INFO] [stdout]    |
[INFO] [stdout] 18 |     activation: Box<Fn(Matrix) -> Matrix>,
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Matrix) -> Matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers/dense.rs:19:22
[INFO] [stdout]    |
[INFO] [stdout] 19 |     dactivation: Box<Fn(Matrix) -> Matrix>
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Matrix) -> Matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `print_gen`
[INFO] [stdout]  --> src/layers/conv.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     print_gen
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers/conv.rs:23:21
[INFO] [stdout]    |
[INFO] [stdout] 23 |     activation: Box<Fn(Matrix) -> Matrix>,
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Matrix) -> Matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers/conv.rs:24:22
[INFO] [stdout]    |
[INFO] [stdout] 24 |     dactivation: Box<Fn(Matrix) -> Matrix>
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Matrix) -> Matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers/mod.rs:10:40
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn load_layer(src: &[&str]) -> Box<Layer> {
[INFO] [stdout]    |                                        ^^^^^ help: use `dyn`: `dyn Layer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/model.rs:48:21
[INFO] [stdout]    |
[INFO] [stdout] 48 |     layers: Vec<Box<Layer>>,
[INFO] [stdout]    |                     ^^^^^ help: use `dyn`: `dyn Layer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/model.rs:57:21
[INFO] [stdout]    |
[INFO] [stdout] 57 |     layers: Vec<Box<Layer>>,
[INFO] [stdout]    |                     ^^^^^ help: use `dyn`: `dyn Layer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/model.rs:64:39
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn layer(mut self, layer: Box<Layer>) -> Self {
[INFO] [stdout]    |                                       ^^^^^ help: use `dyn`: `dyn Layer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/functions/loss.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub type LossFuntion = Fn(&Matrix, &Matrix) -> f64;
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Matrix, &Matrix) -> f64`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/functions/loss.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub type DLossFuntion = Fn(&Matrix, &Matrix) -> Matrix;
[INFO] [stdout]   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Matrix, &Matrix) -> Matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/functions/loss.rs:4:33
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub type LossFuntionGenerator = Fn() -> (Box<LossFuntion>, Box<DLossFuntion>);
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> (Box<LossFuntion>, Box<DLossFuntion>)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `print_gen`
[INFO] [stdout]  --> src/layers/dense.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     print_gen
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers/dense.rs:18:21
[INFO] [stdout]    |
[INFO] [stdout] 18 |     activation: Box<Fn(Matrix) -> Matrix>,
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Matrix) -> Matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers/dense.rs:19:22
[INFO] [stdout]    |
[INFO] [stdout] 19 |     dactivation: Box<Fn(Matrix) -> Matrix>
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Matrix) -> Matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `print_gen`
[INFO] [stdout]  --> src/layers/conv.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     print_gen
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers/conv.rs:23:21
[INFO] [stdout]    |
[INFO] [stdout] 23 |     activation: Box<Fn(Matrix) -> Matrix>,
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Matrix) -> Matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers/conv.rs:24:22
[INFO] [stdout]    |
[INFO] [stdout] 24 |     dactivation: Box<Fn(Matrix) -> Matrix>
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Matrix) -> Matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layers/mod.rs:10:40
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn load_layer(src: &[&str]) -> Box<Layer> {
[INFO] [stdout]    |                                        ^^^^^ help: use `dyn`: `dyn Layer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/model.rs:48:21
[INFO] [stdout]    |
[INFO] [stdout] 48 |     layers: Vec<Box<Layer>>,
[INFO] [stdout]    |                     ^^^^^ help: use `dyn`: `dyn Layer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/model.rs:57:21
[INFO] [stdout]    |
[INFO] [stdout] 57 |     layers: Vec<Box<Layer>>,
[INFO] [stdout]    |                     ^^^^^ help: use `dyn`: `dyn Layer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/model.rs:64:39
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn layer(mut self, layer: Box<Layer>) -> Self {
[INFO] [stdout]    |                                       ^^^^^ help: use `dyn`: `dyn Layer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/model.rs:343:9
[INFO] [stdout]     |
[INFO] [stdout] 339 |         unimplemented!();
[INFO] [stdout]     |         ----------------- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 343 |         let mut fd = File::create(filename).expect("unable to create file!");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `src`
[INFO] [stdout]    --> src/layers/conv.rs:126:24
[INFO] [stdout]     |
[INFO] [stdout] 126 |     pub fn deserialize(src: &[&str]) -> Box<Self> {
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_src`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `filename`
[INFO] [stdout]    --> src/model.rs:338:32
[INFO] [stdout]     |
[INFO] [stdout] 338 |     pub fn save_weights(&self, filename: &str) {
[INFO] [stdout]     |                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filename`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/model.rs:343:9
[INFO] [stdout]     |
[INFO] [stdout] 339 |         unimplemented!();
[INFO] [stdout]     |         ----------------- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 343 |         let mut fd = File::create(filename).expect("unable to create file!");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `src`
[INFO] [stdout]    --> src/layers/conv.rs:126:24
[INFO] [stdout]     |
[INFO] [stdout] 126 |     pub fn deserialize(src: &[&str]) -> Box<Self> {
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_src`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `filename`
[INFO] [stdout]    --> src/model.rs:338:32
[INFO] [stdout]     |
[INFO] [stdout] 338 |     pub fn save_weights(&self, filename: &str) {
[INFO] [stdout]     |                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filename`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/model.rs:95:18
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn build(mut self, init: bool) -> Result<Model, ModelError> {
[INFO] [stdout]    |                  ----^^^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/model.rs:315:13
[INFO] [stdout]     |
[INFO] [stdout] 315 |         let mut lines = buf.split('\n').collect::<Vec<_>>();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `convolve_valid`
[INFO] [stdout]   --> src/utils.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn convolve_valid(input: &Matrix, kernel: &Matrix) -> Matrix {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/model.rs:95:18
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn build(mut self, init: bool) -> Result<Model, ModelError> {
[INFO] [stdout]    |                  ----^^^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/model.rs:315:13
[INFO] [stdout]     |
[INFO] [stdout] 315 |         let mut lines = buf.split('\n').collect::<Vec<_>>();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.94s
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "241f9210fb6720fa412520272e47afe968cdf2127697c3d78f90069990e184ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "241f9210fb6720fa412520272e47afe968cdf2127697c3d78f90069990e184ef", kill_on_drop: false }`
[INFO] [stdout] 241f9210fb6720fa412520272e47afe968cdf2127697c3d78f90069990e184ef