[INFO] updating cached repository neosam/textgame
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/neosam/textgame
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/neosam/textgame" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/neosam/textgame"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/neosam/textgame'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/neosam/textgame" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/neosam/textgame"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/neosam/textgame'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 359186b26b43ed6453980eac3a07663519895243
[INFO] sha for GitHub repo neosam/textgame: 359186b26b43ed6453980eac3a07663519895243
[INFO] validating manifest of neosam/textgame on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of neosam/textgame on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing neosam/textgame
[INFO] finished frobbing neosam/textgame
[INFO] frobbed toml for neosam/textgame written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/neosam/textgame/Cargo.toml
[INFO] started frobbing neosam/textgame
[INFO] finished frobbing neosam/textgame
[INFO] frobbed toml for neosam/textgame written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/neosam/textgame/Cargo.toml
[INFO] crate neosam/textgame already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking neosam/textgame against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-5/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/neosam/textgame:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cee1c85465fb4b1a8b673a3ad259ebddc41182af8cd7bcdb9501c18cf798a1af
[INFO] running `"docker" "start" "-a" "cee1c85465fb4b1a8b673a3ad259ebddc41182af8cd7bcdb9501c18cf798a1af"`
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.1
[INFO] [stderr]     Checking serde_json v0.8.4
[INFO] [stderr]    Compiling serde_codegen v0.8.19
[INFO] [stderr]    Compiling serde_derive v0.8.19
[INFO] [stderr]     Checking textgametest v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lang/mod.rs:13:30
[INFO] [stderr]    |
[INFO] [stderr] 13 | static mut LANG_EN: &'static Lang = &LangEn;
[INFO] [stderr]    |                              ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lang/mod.rs:14:30
[INFO] [stderr]    |
[INFO] [stderr] 14 | static mut LANG_DE: &'static Lang = &LangDe;
[INFO] [stderr]    |                              ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lang/mod.rs:16:27
[INFO] [stderr]    |
[INFO] [stderr] 16 | static mut LANG: &'static Lang = &LangEn;
[INFO] [stderr]    |                           ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lang/mod.rs:18:29
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub fn set_lang(l: &'static Lang) {
[INFO] [stderr]    |                             ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lang/mod.rs:41:24
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub fn t() -> &'static Lang {
[INFO] [stderr]    |                        ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/room.rs:56:85
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn actor_take(&mut self, actor_key: &str, item_key: &str) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/room.rs:68:85
[INFO] [stderr]    |
[INFO] [stderr] 68 |     pub fn actor_drop(&mut self, actor_key: &str, item_key: &str) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/room.rs:80:38
[INFO] [stderr]    |
[INFO] [stderr] 80 |             -> Result<DamageRes, Box<Error>> {
[INFO] [stderr]    |                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/room.rs:95:74
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn actor_to_corpse(&mut self, actor_key: &str) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                          ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game.rs:48:31
[INFO] [stderr]    |
[INFO] [stderr] 48 |             -> Result<(), Box<Error>> {
[INFO] [stderr]    |                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/terminal.rs:19:26
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub type CommandFn = Box<Fn(&mut Game) -> result::Result<bool, Box<Error>>>;
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Game) -> result::Result<bool, Box<Error>>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/terminal.rs:19:68
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub type CommandFn = Box<Fn(&mut Game) -> result::Result<bool, Box<Error>>>;
[INFO] [stderr]    |                                                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/terminal.rs:21:65
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn input_string(prompt: &str) -> result::Result<String, Box<Error>> {
[INFO] [stderr]    |                                                                 ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/terminal.rs:30:79
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub fn read_multiline(prompt: &str, term: &str) -> result::Result<String, Box<Error>> {
[INFO] [stderr]    |                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/terminal.rs:56:56
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn step(&mut self) -> result::Result<bool, Box<Error>> {
[INFO] [stderr]    |                                                        ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/terminal.rs:59:23
[INFO] [stderr]    |
[INFO] [stderr] 59 |             return Ok((false))
[INFO] [stderr]    |                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lang/mod.rs:13:30
[INFO] [stderr]    |
[INFO] [stderr] 13 | static mut LANG_EN: &'static Lang = &LangEn;
[INFO] [stderr]    |                              ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lang/mod.rs:14:30
[INFO] [stderr]    |
[INFO] [stderr] 14 | static mut LANG_DE: &'static Lang = &LangDe;
[INFO] [stderr]    |                              ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lang/mod.rs:16:27
[INFO] [stderr]    |
[INFO] [stderr] 16 | static mut LANG: &'static Lang = &LangEn;
[INFO] [stderr]    |                           ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lang/mod.rs:18:29
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub fn set_lang(l: &'static Lang) {
[INFO] [stderr]    |                             ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lang/mod.rs:41:24
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub fn t() -> &'static Lang {
[INFO] [stderr]    |                        ^^^^ help: use `dyn`: `dyn Lang`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/room.rs:56:85
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn actor_take(&mut self, actor_key: &str, item_key: &str) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/room.rs:68:85
[INFO] [stderr]    |
[INFO] [stderr] 68 |     pub fn actor_drop(&mut self, actor_key: &str, item_key: &str) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/room.rs:80:38
[INFO] [stderr]    |
[INFO] [stderr] 80 |             -> Result<DamageRes, Box<Error>> {
[INFO] [stderr]    |                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/room.rs:95:74
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn actor_to_corpse(&mut self, actor_key: &str) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                          ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game.rs:48:31
[INFO] [stderr]    |
[INFO] [stderr] 48 |             -> Result<(), Box<Error>> {
[INFO] [stderr]    |                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/terminal.rs:19:26
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub type CommandFn = Box<Fn(&mut Game) -> result::Result<bool, Box<Error>>>;
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Game) -> result::Result<bool, Box<Error>>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/terminal.rs:19:68
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub type CommandFn = Box<Fn(&mut Game) -> result::Result<bool, Box<Error>>>;
[INFO] [stderr]    |                                                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/terminal.rs:21:65
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn input_string(prompt: &str) -> result::Result<String, Box<Error>> {
[INFO] [stderr]    |                                                                 ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/terminal.rs:30:79
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub fn read_multiline(prompt: &str, term: &str) -> result::Result<String, Box<Error>> {
[INFO] [stderr]    |                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/terminal.rs:56:56
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn step(&mut self) -> result::Result<bool, Box<Error>> {
[INFO] [stderr]    |                                                        ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/terminal.rs:59:23
[INFO] [stderr]    |
[INFO] [stderr] 59 |             return Ok((false))
[INFO] [stderr]    |                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/game.rs:50:17
[INFO] [stderr]    |
[INFO] [stderr] 50 |             let mut from_room = self.room_mut(from_room_key);
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/game.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |         let mut to_room = self.room_mut(to_room_key);
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:114:15
[INFO] [stderr]     |
[INFO] [stderr] 114 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:126:15
[INFO] [stderr]     |
[INFO] [stderr] 126 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:150:15
[INFO] [stderr]     |
[INFO] [stderr] 150 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:161:15
[INFO] [stderr]     |
[INFO] [stderr] 161 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:173:15
[INFO] [stderr]     |
[INFO] [stderr] 173 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:176:13
[INFO] [stderr]     |
[INFO] [stderr] 176 |         let mut room = game.player_room_mut();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:190:15
[INFO] [stderr]     |
[INFO] [stderr] 190 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/game.rs:50:17
[INFO] [stderr]    |
[INFO] [stderr] 50 |             let mut from_room = self.room_mut(from_room_key);
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/game.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |         let mut to_room = self.room_mut(to_room_key);
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `GameResult`
[INFO] [stderr]   --> src/gameerror.rs:25:1
[INFO] [stderr]    |
[INFO] [stderr] 25 | type GameResult<T> = result::Result<T, GameError>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro)]
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:114:15
[INFO] [stderr]     |
[INFO] [stderr] 114 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:126:15
[INFO] [stderr]     |
[INFO] [stderr] 126 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:150:15
[INFO] [stderr]     |
[INFO] [stderr] 150 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:161:15
[INFO] [stderr]     |
[INFO] [stderr] 161 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:173:15
[INFO] [stderr]     |
[INFO] [stderr] 173 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:176:13
[INFO] [stderr]     |
[INFO] [stderr] 176 |         let mut room = game.player_room_mut();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/terminal.rs:190:15
[INFO] [stderr]     |
[INFO] [stderr] 190 |     Box::new(|mut game| {
[INFO] [stderr]     |               ----^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `GameResult`
[INFO] [stderr]   --> src/gameerror.rs:25:1
[INFO] [stderr]    |
[INFO] [stderr] 25 | type GameResult<T> = result::Result<T, GameError>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro)]
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.12s
[INFO] running `"docker" "inspect" "cee1c85465fb4b1a8b673a3ad259ebddc41182af8cd7bcdb9501c18cf798a1af"`
[INFO] running `"docker" "rm" "-f" "cee1c85465fb4b1a8b673a3ad259ebddc41182af8cd7bcdb9501c18cf798a1af"`
[INFO] [stdout] cee1c85465fb4b1a8b673a3ad259ebddc41182af8cd7bcdb9501c18cf798a1af