[INFO] updating cached repository https://github.com/cdbfoster/takkerus
[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] d7d10db188339347863e8cd99dcf9224afa76bb7
[INFO] checking cdbfoster/takkerus against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcdbfoster%2Ftakkerus" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cdbfoster/takkerus on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/cdbfoster/takkerus
[INFO] finished tweaking git repo https://github.com/cdbfoster/takkerus
[INFO] tweaked toml for git repo https://github.com/cdbfoster/takkerus written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/cdbfoster/takkerus already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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] fd5a109dab7e6bcbe6ec1690d81f2324836a592e59eeb6f0d174c2d580538c88
[INFO] running `"docker" "start" "-a" "fd5a109dab7e6bcbe6ec1690d81f2324836a592e59eeb6f0d174c2d580538c88"`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking zero_sum v1.2.0
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking takkerus v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/player/playtak_player/mod.rs:83:9
[INFO] [stderr]    |
[INFO] [stderr] 83 |         try!(comm::login(&stream, &message_queue, self));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/player/playtak_player/comm.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     try!(write!(*stream, "{}\n", arguments.join(" ")));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/player/playtak_player/comm.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     try!(stream.flush());
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/player/playtak_player/mod.rs:83:9
[INFO] [stderr]    |
[INFO] [stderr] 83 |         try!(comm::login(&stream, &message_queue, self));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/player/playtak_player/comm.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     try!(write!(*stream, "{}\n", arguments.join(" ")));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/player/playtak_player/comm.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     try!(stream.flush());
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:126:29
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let mut search: Box<Search<State>> = if let Some(search) = matches.opt_str("ai") {
[INFO] [stderr]     |                             ^^^^^^^^^^^^^ help: use `dyn`: `dyn Search<State>`
[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/arguments.rs:64:89
[INFO] [stderr]    |
[INFO] [stderr] 64 | pub fn parse_player(game: &Game, player: &str, matches: &Matches) -> Result<(Option<Box<Player>>, Vec<String>), String> {
[INFO] [stderr]    |                                                                                         ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game/mod.rs:34:20
[INFO] [stderr]    |
[INFO] [stderr] 34 |     p1: Option<Box<Player>>,
[INFO] [stderr]    |                    ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game/mod.rs:35:20
[INFO] [stderr]    |
[INFO] [stderr] 35 |     p2: Option<Box<Player>>,
[INFO] [stderr]    |                    ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game/mod.rs:79:46
[INFO] [stderr]    |
[INFO] [stderr] 79 |     pub fn add_player(&mut self, player: Box<Player>) -> Result<(), String> {
[INFO] [stderr]    |                                              ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/mod.rs:28:76
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn initialize(&mut self, to_game: Sender<(Color, Message)>, opponent: &Player) -> Result<Sender<Message>, String>;
[INFO] [stderr]    |                                                                            ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/mod.rs:30:26
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn as_any(&self) -> &Any;
[INFO] [stderr]    |                          ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/cli_player.rs:46:76
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn initialize(&mut self, to_game: Sender<(Color, Message)>, opponent: &Player) -> Result<Sender<Message>, String> {
[INFO] [stderr]    |                                                                            ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/player/cli_player.rs:162:26
[INFO] [stderr]     |
[INFO] [stderr] 162 |     fn as_any(&self) -> &Any {
[INFO] [stderr]     |                          ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/playtak_player/mod.rs:64:69
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn initialize(&mut self, to_game: Sender<(Color, Message)>, _: &Player) -> Result<Sender<Message>, String> {
[INFO] [stderr]    |                                                                     ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/playtak_player/mod.rs:97:26
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn as_any(&self) -> &Any {
[INFO] [stderr]    |                          ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/pvsearch_player.rs:58:76
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn initialize(&mut self, to_game: Sender<(Color, Message)>, opponent: &Player) -> Result<Sender<Message>, String> {
[INFO] [stderr]    |                                                                            ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/player/pvsearch_player.rs:139:26
[INFO] [stderr]     |
[INFO] [stderr] 139 |     fn as_any(&self) -> &Any {
[INFO] [stderr]     |                          ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:126:29
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let mut search: Box<Search<State>> = if let Some(search) = matches.opt_str("ai") {
[INFO] [stderr]     |                             ^^^^^^^^^^^^^ help: use `dyn`: `dyn Search<State>`
[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/arguments.rs:64:89
[INFO] [stderr]    |
[INFO] [stderr] 64 | pub fn parse_player(game: &Game, player: &str, matches: &Matches) -> Result<(Option<Box<Player>>, Vec<String>), String> {
[INFO] [stderr]    |                                                                                         ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game/mod.rs:34:20
[INFO] [stderr]    |
[INFO] [stderr] 34 |     p1: Option<Box<Player>>,
[INFO] [stderr]    |                    ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game/mod.rs:35:20
[INFO] [stderr]    |
[INFO] [stderr] 35 |     p2: Option<Box<Player>>,
[INFO] [stderr]    |                    ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game/mod.rs:79:46
[INFO] [stderr]    |
[INFO] [stderr] 79 |     pub fn add_player(&mut self, player: Box<Player>) -> Result<(), String> {
[INFO] [stderr]    |                                              ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/mod.rs:28:76
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn initialize(&mut self, to_game: Sender<(Color, Message)>, opponent: &Player) -> Result<Sender<Message>, String>;
[INFO] [stderr]    |                                                                            ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/mod.rs:30:26
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn as_any(&self) -> &Any;
[INFO] [stderr]    |                          ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/cli_player.rs:46:76
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn initialize(&mut self, to_game: Sender<(Color, Message)>, opponent: &Player) -> Result<Sender<Message>, String> {
[INFO] [stderr]    |                                                                            ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/player/cli_player.rs:162:26
[INFO] [stderr]     |
[INFO] [stderr] 162 |     fn as_any(&self) -> &Any {
[INFO] [stderr]     |                          ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/playtak_player/mod.rs:64:69
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn initialize(&mut self, to_game: Sender<(Color, Message)>, _: &Player) -> Result<Sender<Message>, String> {
[INFO] [stderr]    |                                                                     ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/playtak_player/mod.rs:97:26
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn as_any(&self) -> &Any {
[INFO] [stderr]    |                          ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/player/pvsearch_player.rs:58:76
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn initialize(&mut self, to_game: Sender<(Color, Message)>, opponent: &Player) -> Result<Sender<Message>, String> {
[INFO] [stderr]    |                                                                            ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/player/pvsearch_player.rs:139:26
[INFO] [stderr]     |
[INFO] [stderr] 139 |     fn as_any(&self) -> &Any {
[INFO] [stderr]     |                          ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/player/playtak_player/parse.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | / lazy_static! {
[INFO] [stderr] 29 | |     static ref WELCOME: Regex = Regex::new(
[INFO] [stderr] 30 | |         r"^Welcome (.*)!$"
[INFO] [stderr] 31 | |     ).unwrap();
[INFO] [stderr] ...  |
[INFO] [stderr] 39 | |     ).unwrap();
[INFO] [stderr] 40 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/player/playtak_player/parse.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | / lazy_static! {
[INFO] [stderr] 29 | |     static ref WELCOME: Regex = Regex::new(
[INFO] [stderr] 30 | |         r"^Welcome (.*)!$"
[INFO] [stderr] 31 | |     ).unwrap();
[INFO] [stderr] ...  |
[INFO] [stderr] 39 | |     ).unwrap();
[INFO] [stderr] 40 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/player/playtak_player/parse.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | / lazy_static! {
[INFO] [stderr] 29 | |     static ref WELCOME: Regex = Regex::new(
[INFO] [stderr] 30 | |         r"^Welcome (.*)!$"
[INFO] [stderr] 31 | |     ).unwrap();
[INFO] [stderr] ...  |
[INFO] [stderr] 39 | |     ).unwrap();
[INFO] [stderr] 40 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/player/playtak_player/parse.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | / lazy_static! {
[INFO] [stderr] 29 | |     static ref WELCOME: Regex = Regex::new(
[INFO] [stderr] 30 | |         r"^Welcome (.*)!$"
[INFO] [stderr] 31 | |     ).unwrap();
[INFO] [stderr] ...  |
[INFO] [stderr] 39 | |     ).unwrap();
[INFO] [stderr] 40 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/player/playtak_player/parse.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | / lazy_static! {
[INFO] [stderr] 29 | |     static ref WELCOME: Regex = Regex::new(
[INFO] [stderr] 30 | |         r"^Welcome (.*)!$"
[INFO] [stderr] 31 | |     ).unwrap();
[INFO] [stderr] ...  |
[INFO] [stderr] 39 | |     ).unwrap();
[INFO] [stderr] 40 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/player/playtak_player/parse.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | / lazy_static! {
[INFO] [stderr] 29 | |     static ref WELCOME: Regex = Regex::new(
[INFO] [stderr] 30 | |         r"^Welcome (.*)!$"
[INFO] [stderr] 31 | |     ).unwrap();
[INFO] [stderr] ...  |
[INFO] [stderr] 39 | |     ).unwrap();
[INFO] [stderr] 40 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[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:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 | #![feature(conservative_impl_trait)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 20 warnings emitted
[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:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 | #![feature(conservative_impl_trait)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 20 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.67s
[INFO] running `"docker" "inspect" "fd5a109dab7e6bcbe6ec1690d81f2324836a592e59eeb6f0d174c2d580538c88"`
[INFO] running `"docker" "rm" "-f" "fd5a109dab7e6bcbe6ec1690d81f2324836a592e59eeb6f0d174c2d580538c88"`
[INFO] [stdout] fd5a109dab7e6bcbe6ec1690d81f2324836a592e59eeb6f0d174c2d580538c88