[INFO] cloning repository https://github.com/neosam/textgame
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/neosam/textgame" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneosam%2Ftextgame", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneosam%2Ftextgame'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 359186b26b43ed6453980eac3a07663519895243
[INFO] checking neosam/textgame against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneosam%2Ftextgame" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/neosam/textgame on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/neosam/textgame
[INFO] finished tweaking git repo https://github.com/neosam/textgame
[INFO] tweaked toml for git repo https://github.com/neosam/textgame written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/neosam/textgame already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 570eb4ea5e031354631521fd079728e366192d94f5bb8847c46b53758087a7b7
[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" "570eb4ea5e031354631521fd079728e366192d94f5bb8847c46b53758087a7b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "570eb4ea5e031354631521fd079728e366192d94f5bb8847c46b53758087a7b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "570eb4ea5e031354631521fd079728e366192d94f5bb8847c46b53758087a7b7", kill_on_drop: false }`
[INFO] [stdout] 570eb4ea5e031354631521fd079728e366192d94f5bb8847c46b53758087a7b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 064464a811b5b6f9e0a34dbfd2ff329584279c9159c0b68b81d68b2b51a34ca1
[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" "064464a811b5b6f9e0a34dbfd2ff329584279c9159c0b68b81d68b2b51a34ca1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling quote v0.3.10
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]     Checking serde v0.8.19
[INFO] [stderr]     Checking dtoa v0.2.2
[INFO] [stderr]    Compiling syn v0.10.3
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.1
[INFO] [stderr]    Compiling serde_codegen v0.8.19
[INFO] [stderr]     Checking serde_json v0.8.4
[INFO] [stderr]    Compiling serde_derive v0.8.19
[INFO] [stderr]     Checking textgametest v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lang/mod.rs:13:30
[INFO] [stdout]    |
[INFO] [stdout] 13 | static mut LANG_EN: &'static Lang = &LangEn;
[INFO] [stdout]    |                              ^^^^ help: use `dyn`: `dyn Lang`
[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/lang/mod.rs:14:30
[INFO] [stdout]    |
[INFO] [stdout] 14 | static mut LANG_DE: &'static Lang = &LangDe;
[INFO] [stdout]    |                              ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lang/mod.rs:16:27
[INFO] [stdout]    |
[INFO] [stdout] 16 | static mut LANG: &'static Lang = &LangEn;
[INFO] [stdout]    |                           ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lang/mod.rs:18:29
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn set_lang(l: &'static Lang) {
[INFO] [stdout]    |                             ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lang/mod.rs:41:24
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn t() -> &'static Lang {
[INFO] [stdout]    |                        ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/room.rs:56:85
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn actor_take(&mut self, actor_key: &str, item_key: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/room.rs:68:85
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn actor_drop(&mut self, actor_key: &str, item_key: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/room.rs:80:38
[INFO] [stdout]    |
[INFO] [stdout] 80 |             -> Result<DamageRes, Box<Error>> {
[INFO] [stdout]    |                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/room.rs:95:74
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn actor_to_corpse(&mut self, actor_key: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                          ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game.rs:48:31
[INFO] [stdout]    |
[INFO] [stdout] 48 |             -> Result<(), Box<Error>> {
[INFO] [stdout]    |                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/terminal.rs:19:26
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub type CommandFn = Box<Fn(&mut Game) -> result::Result<bool, Box<Error>>>;
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Game) -> result::Result<bool, Box<Error>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/terminal.rs:19:68
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub type CommandFn = Box<Fn(&mut Game) -> result::Result<bool, Box<Error>>>;
[INFO] [stdout]    |                                                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/terminal.rs:21:65
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn input_string(prompt: &str) -> result::Result<String, Box<Error>> {
[INFO] [stdout]    |                                                                 ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/terminal.rs:30:79
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn read_multiline(prompt: &str, term: &str) -> result::Result<String, Box<Error>> {
[INFO] [stdout]    |                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/terminal.rs:56:56
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn step(&mut self) -> result::Result<bool, Box<Error>> {
[INFO] [stdout]    |                                                        ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/terminal.rs:59:23
[INFO] [stdout]    |
[INFO] [stdout] 59 |             return Ok((false))
[INFO] [stdout]    |                       ^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lang/mod.rs:13:30
[INFO] [stdout]    |
[INFO] [stdout] 13 | static mut LANG_EN: &'static Lang = &LangEn;
[INFO] [stdout]    |                              ^^^^ help: use `dyn`: `dyn Lang`
[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/lang/mod.rs:14:30
[INFO] [stdout]    |
[INFO] [stdout] 14 | static mut LANG_DE: &'static Lang = &LangDe;
[INFO] [stdout]    |                              ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lang/mod.rs:16:27
[INFO] [stdout]    |
[INFO] [stdout] 16 | static mut LANG: &'static Lang = &LangEn;
[INFO] [stdout]    |                           ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lang/mod.rs:18:29
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn set_lang(l: &'static Lang) {
[INFO] [stdout]    |                             ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lang/mod.rs:41:24
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn t() -> &'static Lang {
[INFO] [stdout]    |                        ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/room.rs:56:85
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn actor_take(&mut self, actor_key: &str, item_key: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/room.rs:68:85
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn actor_drop(&mut self, actor_key: &str, item_key: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/room.rs:80:38
[INFO] [stdout]    |
[INFO] [stdout] 80 |             -> Result<DamageRes, Box<Error>> {
[INFO] [stdout]    |                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/room.rs:95:74
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn actor_to_corpse(&mut self, actor_key: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                          ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game.rs:48:31
[INFO] [stdout]    |
[INFO] [stdout] 48 |             -> Result<(), Box<Error>> {
[INFO] [stdout]    |                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/terminal.rs:19:26
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub type CommandFn = Box<Fn(&mut Game) -> result::Result<bool, Box<Error>>>;
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Game) -> result::Result<bool, Box<Error>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/terminal.rs:19:68
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub type CommandFn = Box<Fn(&mut Game) -> result::Result<bool, Box<Error>>>;
[INFO] [stdout]    |                                                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/terminal.rs:21:65
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn input_string(prompt: &str) -> result::Result<String, Box<Error>> {
[INFO] [stdout]    |                                                                 ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/terminal.rs:30:79
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn read_multiline(prompt: &str, term: &str) -> result::Result<String, Box<Error>> {
[INFO] [stdout]    |                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/terminal.rs:56:56
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn step(&mut self) -> result::Result<bool, Box<Error>> {
[INFO] [stdout]    |                                                        ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/terminal.rs:59:23
[INFO] [stdout]    |
[INFO] [stdout] 59 |             return Ok((false))
[INFO] [stdout]    |                       ^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/game.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 |             let mut from_room = self.room_mut(from_room_key);
[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/game.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut to_room = self.room_mut(to_room_key);
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:114:15
[INFO] [stdout]     |
[INFO] [stdout] 114 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:126:15
[INFO] [stdout]     |
[INFO] [stdout] 126 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:150:15
[INFO] [stdout]     |
[INFO] [stdout] 150 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:161:15
[INFO] [stdout]     |
[INFO] [stdout] 161 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:173:15
[INFO] [stdout]     |
[INFO] [stdout] 173 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:176:13
[INFO] [stdout]     |
[INFO] [stdout] 176 |         let mut room = game.player_room_mut();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/game.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 |             let mut from_room = self.room_mut(from_room_key);
[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/game.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut to_room = self.room_mut(to_room_key);
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:190:15
[INFO] [stdout]     |
[INFO] [stdout] 190 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `GameResult`
[INFO] [stdout]   --> src/gameerror.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | type GameResult<T> = result::Result<T, GameError>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:114:15
[INFO] [stdout]     |
[INFO] [stdout] 114 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(conservative_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:126:15
[INFO] [stdout]     |
[INFO] [stdout] 126 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:150:15
[INFO] [stdout]     |
[INFO] [stdout] 150 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:161:15
[INFO] [stdout]     |
[INFO] [stdout] 161 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:173:15
[INFO] [stdout]     |
[INFO] [stdout] 173 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:176:13
[INFO] [stdout]     |
[INFO] [stdout] 176 |         let mut room = game.player_room_mut();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/terminal.rs:190:15
[INFO] [stdout]     |
[INFO] [stdout] 190 |     Box::new(|mut game| {
[INFO] [stdout]     |               ----^^^^
[INFO] [stdout]     |               |
[INFO] [stdout]     |               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `GameResult`
[INFO] [stdout]   --> src/gameerror.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | type GameResult<T> = result::Result<T, GameError>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(conservative_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 28 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 28 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.20s
[INFO] running `Command { std: "docker" "inspect" "064464a811b5b6f9e0a34dbfd2ff329584279c9159c0b68b81d68b2b51a34ca1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "064464a811b5b6f9e0a34dbfd2ff329584279c9159c0b68b81d68b2b51a34ca1", kill_on_drop: false }`
[INFO] [stdout] 064464a811b5b6f9e0a34dbfd2ff329584279c9159c0b68b81d68b2b51a34ca1