[INFO] updating cached repository https://github.com/hmc-memsafe-2016f/wk0-starter
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 509905703e51ca040ffc433f2c314da4f515107e
[INFO] checking hmc-memsafe-2016f/wk0-starter against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhmc-memsafe-2016f%2Fwk0-starter" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hmc-memsafe-2016f/wk0-starter on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/hmc-memsafe-2016f/wk0-starter
[INFO] finished tweaking git repo https://github.com/hmc-memsafe-2016f/wk0-starter
[INFO] tweaked toml for git repo https://github.com/hmc-memsafe-2016f/wk0-starter written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/hmc-memsafe-2016f/wk0-starter already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 23f6ab17f53c98f73f356fff7903863f1dd26000c93a4d284c83661ef9a41860
[INFO] running `"docker" "start" "-a" "23f6ab17f53c98f73f356fff7903863f1dd26000c93a4d284c83661ef9a41860"`
[INFO] [stderr]     Checking wk0-starter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `input`
[INFO] [stderr]   --> src/main.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 | fn parse_action(input: &str) -> Result<Action,HanoiError> {
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_input`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `action`
[INFO] [stderr]    --> src/main.rs:198:77
[INFO] [stderr]     |
[INFO] [stderr] 198 |         let next_step_or_err = parse_action(line.as_str().trim()).and_then(|action| {
[INFO] [stderr]     |                                                                             ^^^^^^ help: consider prefixing with an underscore: `_action`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `from`
[INFO] [stderr]   --> src/main.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn new(from: Peg, to: Peg) -> Move {
[INFO] [stderr]    |            ^^^^ help: consider prefixing with an underscore: `_from`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `to`
[INFO] [stderr]   --> src/main.rs:32:23
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn new(from: Peg, to: Peg) -> Move {
[INFO] [stderr]    |                       ^^ help: consider prefixing with an underscore: `_to`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]   --> src/main.rs:77:39
[INFO] [stderr]    |
[INFO] [stderr] 77 |             HanoiError::UnstableStack(peg, Disk(size)) => unimplemented!(),
[INFO] [stderr]    |                                       ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]   --> src/main.rs:77:49
[INFO] [stderr]    |
[INFO] [stderr] 77 |             HanoiError::UnstableStack(peg, Disk(size)) => unimplemented!(),
[INFO] [stderr]    |                                                 ^^^^ help: consider prefixing with an underscore: `_size`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]   --> src/main.rs:78:35
[INFO] [stderr]    |
[INFO] [stderr] 78 |             HanoiError::EmptyFrom(peg) => unimplemented!(),
[INFO] [stderr]    |                                   ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `disks`
[INFO] [stderr]    --> src/main.rs:101:12
[INFO] [stderr]     |
[INFO] [stderr] 101 |     fn new(disks: u8) -> State {
[INFO] [stderr]     |            ^^^^^ help: consider prefixing with an underscore: `_disks`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]    --> src/main.rs:106:33
[INFO] [stderr]     |
[INFO] [stderr] 106 |     fn get_tower_mut(&mut self, peg: Peg) -> &mut Vec<Disk> {
[INFO] [stderr]     |                                 ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]    --> src/main.rs:111:25
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn get_tower(&self, peg: Peg) -> &Vec<Disk> {
[INFO] [stderr]     |                         ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]    --> src/main.rs:116:28
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn pop_disk(&mut self, peg: Peg) -> Option<Disk> {
[INFO] [stderr]     |                            ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]    --> src/main.rs:133:29
[INFO] [stderr]     |
[INFO] [stderr] 133 |     fn push_disk(&mut self, peg: Peg, disk: Disk) -> Result<(), HanoiError> {
[INFO] [stderr]     |                             ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `disk`
[INFO] [stderr]    --> src/main.rs:133:39
[INFO] [stderr]     |
[INFO] [stderr] 133 |     fn push_disk(&mut self, peg: Peg, disk: Disk) -> Result<(), HanoiError> {
[INFO] [stderr]     |                                       ^^^^ help: consider prefixing with an underscore: `_disk`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mov`
[INFO] [stderr]    --> src/main.rs:151:27
[INFO] [stderr]     |
[INFO] [stderr] 151 |     fn do_move(&mut self, mov: Move) -> Result<NextStep, HanoiError> {
[INFO] [stderr]     |                           ^^^ help: consider prefixing with an underscore: `_mov`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:188:9
[INFO] [stderr]     |
[INFO] [stderr] 188 |     let mut state = State::new(user_start_size.unwrap_or(START_SIZE));
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `left`
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     left: Vec<Disk>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `center`
[INFO] [stderr]   --> src/main.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     center: Vec<Disk>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `right`
[INFO] [stderr]   --> src/main.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     right: Vec<Disk>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn new(from: Peg, to: Peg) -> Move {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Move`
[INFO] [stderr]   --> src/main.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     Move(Move),
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quit`
[INFO] [stderr]   --> src/main.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     Quit,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quit`
[INFO] [stderr]   --> src/main.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     Quit,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Win`
[INFO] [stderr]   --> src/main.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     Win,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Continue`
[INFO] [stderr]   --> src/main.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     Continue,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UnknownCommand`
[INFO] [stderr]   --> src/main.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     UnknownCommand,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UnstableStack`
[INFO] [stderr]   --> src/main.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     UnstableStack(Peg, Disk),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `EmptyFrom`
[INFO] [stderr]   --> src/main.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     EmptyFrom(Peg),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_tower_mut`
[INFO] [stderr]    --> src/main.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     fn get_tower_mut(&mut self, peg: Peg) -> &mut Vec<Disk> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop_disk`
[INFO] [stderr]    --> src/main.rs:116:5
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn pop_disk(&mut self, peg: Peg) -> Option<Disk> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_disk`
[INFO] [stderr]    --> src/main.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn peek_disk(&self, peg: Peg) -> Option<Disk> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_disk`
[INFO] [stderr]    --> src/main.rs:133:5
[INFO] [stderr]     |
[INFO] [stderr] 133 |     fn push_disk(&mut self, peg: Peg, disk: Disk) -> Result<(), HanoiError> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `done`
[INFO] [stderr]    --> src/main.rs:138:5
[INFO] [stderr]     |
[INFO] [stderr] 138 |     fn done(&self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `do_move`
[INFO] [stderr]    --> src/main.rs:151:5
[INFO] [stderr]     |
[INFO] [stderr] 151 |     fn do_move(&mut self, mov: Move) -> Result<NextStep, HanoiError> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `input`
[INFO] [stderr]   --> src/main.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 | fn parse_action(input: &str) -> Result<Action,HanoiError> {
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_input`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `action`
[INFO] [stderr]    --> src/main.rs:198:77
[INFO] [stderr]     |
[INFO] [stderr] 198 |         let next_step_or_err = parse_action(line.as_str().trim()).and_then(|action| {
[INFO] [stderr]     |                                                                             ^^^^^^ help: consider prefixing with an underscore: `_action`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `from`
[INFO] [stderr]   --> src/main.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn new(from: Peg, to: Peg) -> Move {
[INFO] [stderr]    |            ^^^^ help: consider prefixing with an underscore: `_from`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `to`
[INFO] [stderr]   --> src/main.rs:32:23
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn new(from: Peg, to: Peg) -> Move {
[INFO] [stderr]    |                       ^^ help: consider prefixing with an underscore: `_to`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]   --> src/main.rs:77:39
[INFO] [stderr]    |
[INFO] [stderr] 77 |             HanoiError::UnstableStack(peg, Disk(size)) => unimplemented!(),
[INFO] [stderr]    |                                       ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]   --> src/main.rs:77:49
[INFO] [stderr]    |
[INFO] [stderr] 77 |             HanoiError::UnstableStack(peg, Disk(size)) => unimplemented!(),
[INFO] [stderr]    |                                                 ^^^^ help: consider prefixing with an underscore: `_size`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]   --> src/main.rs:78:35
[INFO] [stderr]    |
[INFO] [stderr] 78 |             HanoiError::EmptyFrom(peg) => unimplemented!(),
[INFO] [stderr]    |                                   ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `disks`
[INFO] [stderr]    --> src/main.rs:101:12
[INFO] [stderr]     |
[INFO] [stderr] 101 |     fn new(disks: u8) -> State {
[INFO] [stderr]     |            ^^^^^ help: consider prefixing with an underscore: `_disks`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]    --> src/main.rs:106:33
[INFO] [stderr]     |
[INFO] [stderr] 106 |     fn get_tower_mut(&mut self, peg: Peg) -> &mut Vec<Disk> {
[INFO] [stderr]     |                                 ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]    --> src/main.rs:111:25
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn get_tower(&self, peg: Peg) -> &Vec<Disk> {
[INFO] [stderr]     |                         ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]    --> src/main.rs:116:28
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn pop_disk(&mut self, peg: Peg) -> Option<Disk> {
[INFO] [stderr]     |                            ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peg`
[INFO] [stderr]    --> src/main.rs:133:29
[INFO] [stderr]     |
[INFO] [stderr] 133 |     fn push_disk(&mut self, peg: Peg, disk: Disk) -> Result<(), HanoiError> {
[INFO] [stderr]     |                             ^^^ help: consider prefixing with an underscore: `_peg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `disk`
[INFO] [stderr]    --> src/main.rs:133:39
[INFO] [stderr]     |
[INFO] [stderr] 133 |     fn push_disk(&mut self, peg: Peg, disk: Disk) -> Result<(), HanoiError> {
[INFO] [stderr]     |                                       ^^^^ help: consider prefixing with an underscore: `_disk`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mov`
[INFO] [stderr]    --> src/main.rs:151:27
[INFO] [stderr]     |
[INFO] [stderr] 151 |     fn do_move(&mut self, mov: Move) -> Result<NextStep, HanoiError> {
[INFO] [stderr]     |                           ^^^ help: consider prefixing with an underscore: `_mov`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:188:9
[INFO] [stderr]     |
[INFO] [stderr] 188 |     let mut state = State::new(user_start_size.unwrap_or(START_SIZE));
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `left`
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     left: Vec<Disk>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `center`
[INFO] [stderr]   --> src/main.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     center: Vec<Disk>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `right`
[INFO] [stderr]   --> src/main.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     right: Vec<Disk>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn new(from: Peg, to: Peg) -> Move {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Move`
[INFO] [stderr]   --> src/main.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     Move(Move),
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quit`
[INFO] [stderr]   --> src/main.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     Quit,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quit`
[INFO] [stderr]   --> src/main.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     Quit,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Win`
[INFO] [stderr]   --> src/main.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     Win,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Continue`
[INFO] [stderr]   --> src/main.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     Continue,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UnknownCommand`
[INFO] [stderr]   --> src/main.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     UnknownCommand,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UnstableStack`
[INFO] [stderr]   --> src/main.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     UnstableStack(Peg, Disk),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `EmptyFrom`
[INFO] [stderr]   --> src/main.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     EmptyFrom(Peg),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_tower_mut`
[INFO] [stderr]    --> src/main.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     fn get_tower_mut(&mut self, peg: Peg) -> &mut Vec<Disk> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop_disk`
[INFO] [stderr]    --> src/main.rs:116:5
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn pop_disk(&mut self, peg: Peg) -> Option<Disk> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_disk`
[INFO] [stderr]    --> src/main.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn peek_disk(&self, peg: Peg) -> Option<Disk> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_disk`
[INFO] [stderr]    --> src/main.rs:133:5
[INFO] [stderr]     |
[INFO] [stderr] 133 |     fn push_disk(&mut self, peg: Peg, disk: Disk) -> Result<(), HanoiError> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `done`
[INFO] [stderr]    --> src/main.rs:138:5
[INFO] [stderr]     |
[INFO] [stderr] 138 |     fn done(&self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `do_move`
[INFO] [stderr]    --> src/main.rs:151:5
[INFO] [stderr]     |
[INFO] [stderr] 151 |     fn do_move(&mut self, mov: Move) -> Result<NextStep, HanoiError> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `"docker" "inspect" "23f6ab17f53c98f73f356fff7903863f1dd26000c93a4d284c83661ef9a41860"`
[INFO] running `"docker" "rm" "-f" "23f6ab17f53c98f73f356fff7903863f1dd26000c93a4d284c83661ef9a41860"`
[INFO] [stdout] 23f6ab17f53c98f73f356fff7903863f1dd26000c93a4d284c83661ef9a41860