[INFO] updating cached repository shinkwhek/rs2048
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/shinkwhek/rs2048
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/shinkwhek/rs2048" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/shinkwhek/rs2048"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/shinkwhek/rs2048'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/shinkwhek/rs2048" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/shinkwhek/rs2048"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/shinkwhek/rs2048'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9dead87635a1b8a31c8348147960801b2a0082f5
[INFO] sha for GitHub repo shinkwhek/rs2048: 9dead87635a1b8a31c8348147960801b2a0082f5
[INFO] validating manifest of shinkwhek/rs2048 on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of shinkwhek/rs2048 on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing shinkwhek/rs2048
[INFO] finished frobbing shinkwhek/rs2048
[INFO] frobbed toml for shinkwhek/rs2048 written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/shinkwhek/rs2048/Cargo.toml
[INFO] started frobbing shinkwhek/rs2048
[INFO] finished frobbing shinkwhek/rs2048
[INFO] frobbed toml for shinkwhek/rs2048 written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/shinkwhek/rs2048/Cargo.toml
[INFO] crate shinkwhek/rs2048 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking shinkwhek/rs2048 against try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-4/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/shinkwhek/rs2048:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 011fd77f92a8a47e3b755f274b4c8b2a68c12d5dc352496fdac1955f750ffcd4
[INFO] running `"docker" "start" "-a" "011fd77f92a8a47e3b755f274b4c8b2a68c12d5dc352496fdac1955f750ffcd4"`
[INFO] [stderr]     Checking atty v0.2.8
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking clap v2.31.1
[INFO] [stderr]     Checking rustyline v1.0.0
[INFO] [stderr]     Checking rs2048 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variant is never constructed: `Nothing`
[INFO] [stderr]   --> src/board.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Nothing,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Exist`
[INFO] [stderr]   --> src/board.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Exist,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/board.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn new(score: usize, status: Status) -> Tile {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_score`
[INFO] [stderr]   --> src/board.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn get_score(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_exist`
[INFO] [stderr]   --> src/board.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn is_exist(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_nothing`
[INFO] [stderr]   --> src/board.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn is_nothing(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Board`
[INFO] [stderr]   --> src/board.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub struct Board {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/board.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub fn new() -> Board {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `gen`
[INFO] [stderr]   --> src/board.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn gen(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `color`
[INFO] [stderr]   --> src/board.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     fn color(n: usize) -> Colour {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `format_line`
[INFO] [stderr]   --> src/board.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn format_line(&self, n: usize, t: Option<usize>) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `render`
[INFO] [stderr]    --> src/board.rs:118:5
[INFO] [stderr]     |
[INFO] [stderr] 118 |     pub fn render(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_tile`
[INFO] [stderr]    --> src/board.rs:171:5
[INFO] [stderr]     |
[INFO] [stderr] 171 |     pub fn get_tile(&self, n: usize) -> Option<&Tile> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_score`
[INFO] [stderr]    --> src/board.rs:178:5
[INFO] [stderr]     |
[INFO] [stderr] 178 |     fn get_score(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum_score`
[INFO] [stderr]    --> src/board.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     fn sum_score(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `render_parameter_box`
[INFO] [stderr]    --> src/board.rs:191:5
[INFO] [stderr]     |
[INFO] [stderr] 191 |     pub fn render_parameter_box(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fin`
[INFO] [stderr]    --> src/board.rs:216:5
[INFO] [stderr]     |
[INFO] [stderr] 216 |     pub fn fin(&mut self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Update`
[INFO] [stderr]  --> src/app.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Update();
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update`
[INFO] [stderr]   --> src/app.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn update(board: &mut board::Board) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `up`
[INFO] [stderr]   --> src/app.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     pub fn up(board: &mut board::Board) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `down`
[INFO] [stderr]   --> src/app.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     pub fn down(board: &mut board::Board) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `left`
[INFO] [stderr]    --> src/app.rs:120:5
[INFO] [stderr]     |
[INFO] [stderr] 120 |     pub fn left(board: &mut board::Board) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `right`
[INFO] [stderr]    --> src/app.rs:151:5
[INFO] [stderr]     |
[INFO] [stderr] 151 |     pub fn right(board: &mut board::Board) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_finished`
[INFO] [stderr]    --> src/app.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     pub fn is_finished(board: &board::Board) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nothing`
[INFO] [stderr]   --> src/board.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Nothing,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Exist`
[INFO] [stderr]   --> src/board.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Exist,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/board.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn new(score: usize, status: Status) -> Tile {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_score`
[INFO] [stderr]   --> src/board.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn get_score(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_exist`
[INFO] [stderr]   --> src/board.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn is_exist(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_nothing`
[INFO] [stderr]   --> src/board.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn is_nothing(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Board`
[INFO] [stderr]   --> src/board.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub struct Board {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/board.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub fn new() -> Board {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `gen`
[INFO] [stderr]   --> src/board.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn gen(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `color`
[INFO] [stderr]   --> src/board.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     fn color(n: usize) -> Colour {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `format_line`
[INFO] [stderr]   --> src/board.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn format_line(&self, n: usize, t: Option<usize>) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `render`
[INFO] [stderr]    --> src/board.rs:118:5
[INFO] [stderr]     |
[INFO] [stderr] 118 |     pub fn render(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_tile`
[INFO] [stderr]    --> src/board.rs:171:5
[INFO] [stderr]     |
[INFO] [stderr] 171 |     pub fn get_tile(&self, n: usize) -> Option<&Tile> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_score`
[INFO] [stderr]    --> src/board.rs:178:5
[INFO] [stderr]     |
[INFO] [stderr] 178 |     fn get_score(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum_score`
[INFO] [stderr]    --> src/board.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     fn sum_score(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `render_parameter_box`
[INFO] [stderr]    --> src/board.rs:191:5
[INFO] [stderr]     |
[INFO] [stderr] 191 |     pub fn render_parameter_box(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fin`
[INFO] [stderr]    --> src/board.rs:216:5
[INFO] [stderr]     |
[INFO] [stderr] 216 |     pub fn fin(&mut self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Update`
[INFO] [stderr]  --> src/app.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Update();
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update`
[INFO] [stderr]   --> src/app.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn update(board: &mut board::Board) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `up`
[INFO] [stderr]   --> src/app.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     pub fn up(board: &mut board::Board) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `down`
[INFO] [stderr]   --> src/app.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     pub fn down(board: &mut board::Board) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `left`
[INFO] [stderr]    --> src/app.rs:120:5
[INFO] [stderr]     |
[INFO] [stderr] 120 |     pub fn left(board: &mut board::Board) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `right`
[INFO] [stderr]    --> src/app.rs:151:5
[INFO] [stderr]     |
[INFO] [stderr] 151 |     pub fn right(board: &mut board::Board) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_finished`
[INFO] [stderr]    --> src/app.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     pub fn is_finished(board: &board::Board) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_nothing`
[INFO] [stderr]   --> src/board.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn is_nothing(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_nothing`
[INFO] [stderr]   --> src/board.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn is_nothing(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.05s
[INFO] running `"docker" "inspect" "011fd77f92a8a47e3b755f274b4c8b2a68c12d5dc352496fdac1955f750ffcd4"`
[INFO] running `"docker" "rm" "-f" "011fd77f92a8a47e3b755f274b4c8b2a68c12d5dc352496fdac1955f750ffcd4"`
[INFO] [stdout] 011fd77f92a8a47e3b755f274b4c8b2a68c12d5dc352496fdac1955f750ffcd4