[INFO] cloning repository https://github.com/mdenchev/tictactoe
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mdenchev/tictactoe" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdenchev%2Ftictactoe", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdenchev%2Ftictactoe'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ee389ebfe23632834be8f9de7079adffb0dff031
[INFO] testing mdenchev/tictactoe against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdenchev%2Ftictactoe" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mdenchev/tictactoe on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mdenchev/tictactoe
[INFO] finished tweaking git repo https://github.com/mdenchev/tictactoe
[INFO] tweaked toml for git repo https://github.com/mdenchev/tictactoe written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/mdenchev/tictactoe already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /workspace/builds/worker-1/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[INFO] the lockfile is outdated, regenerating it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 `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d8cd1874b0930c881424b186367c6b240a4c08b3399cef2c4fdf080e7d7b194
[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" "8d8cd1874b0930c881424b186367c6b240a4c08b3399cef2c4fdf080e7d7b194", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d8cd1874b0930c881424b186367c6b240a4c08b3399cef2c4fdf080e7d7b194", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d8cd1874b0930c881424b186367c6b240a4c08b3399cef2c4fdf080e7d7b194", kill_on_drop: false }`
[INFO] [stdout] 8d8cd1874b0930c881424b186367c6b240a4c08b3399cef2c4fdf080e7d7b194
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f8681cc3f1d21301817e8b75d4fdbf963cfef86bc876c64107458493e7de4c3
[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" "1f8681cc3f1d21301817e8b75d4fdbf963cfef86bc876c64107458493e7de4c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.2.1
[INFO] [stderr]    Compiling rand_core v0.6.1
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.1
[INFO] [stderr]    Compiling tictactoe v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tic_tac_toe.rs:132:22
[INFO] [stdout]     |
[INFO] [stdout] 132 |         let player = try!(self.get_current_player());
[INFO] [stdout]     |                      ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tic_tac_toe.rs:133:22
[INFO] [stdout]     |
[INFO] [stdout] 133 |         let (x, y) = try!(self.parse_position_string(pos));
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tic_tac_toe.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |         try!(self.add_to_board(player, x, y));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tic_tac_toe.rs:135:9
[INFO] [stdout]     |
[INFO] [stdout] 135 |         try!(self.switch_players());
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:50:22
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let mut stream = try!(TcpStream::connect(server));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     try!(stream.set_nonblocking(true));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/network.rs:32:40
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let end = cmp::min(8 + length, (self.raw.len() as u32));
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let mut stream = try!(TcpStream::connect(server));
[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: struct is never constructed: `NetworkAdapter`
[INFO] [stdout]  --> src/network.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct NetworkAdapter<'a> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/network.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new(raw: &'a [u8]) -> Result<NetworkAdapter<'a>, &str> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_version`
[INFO] [stdout]   --> src/network.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_version(&self) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_length`
[INFO] [stdout]   --> src/network.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn get_length(&self) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_data`
[INFO] [stdout]   --> src/network.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn get_data(&self) -> &'a [u8] {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_u32`
[INFO] [stdout]   --> src/network.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn read_u32(data: &[u8]) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `find_match`
[INFO] [stdout]   --> src/main.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn find_match(stream: &mut TcpStream) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> src/main.rs:17:36
[INFO] [stdout]    |
[INFO] [stdout] 17 |     for (r_idx, row) in game.board.into_iter().enumerate() {
[INFO] [stdout]    |                                    ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |             connect_to_server();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.39s
[INFO] running `Command { std: "docker" "inspect" "1f8681cc3f1d21301817e8b75d4fdbf963cfef86bc876c64107458493e7de4c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f8681cc3f1d21301817e8b75d4fdbf963cfef86bc876c64107458493e7de4c3", kill_on_drop: false }`
[INFO] [stdout] 1f8681cc3f1d21301817e8b75d4fdbf963cfef86bc876c64107458493e7de4c3
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57ee0d54e5c384ffef7ae36a8a1fac17de7d714f9abe5b3dbc5ba992fb4006b6
[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" "57ee0d54e5c384ffef7ae36a8a1fac17de7d714f9abe5b3dbc5ba992fb4006b6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling tictactoe v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tic_tac_toe.rs:132:22
[INFO] [stdout]     |
[INFO] [stdout] 132 |         let player = try!(self.get_current_player());
[INFO] [stdout]     |                      ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tic_tac_toe.rs:133:22
[INFO] [stdout]     |
[INFO] [stdout] 133 |         let (x, y) = try!(self.parse_position_string(pos));
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tic_tac_toe.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |         try!(self.add_to_board(player, x, y));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tic_tac_toe.rs:135:9
[INFO] [stdout]     |
[INFO] [stdout] 135 |         try!(self.switch_players());
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:50:22
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let mut stream = try!(TcpStream::connect(server));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     try!(stream.set_nonblocking(true));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/network.rs:32:40
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let end = cmp::min(8 + length, (self.raw.len() as u32));
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let mut stream = try!(TcpStream::connect(server));
[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: struct is never constructed: `NetworkAdapter`
[INFO] [stdout]  --> src/network.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct NetworkAdapter<'a> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/network.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new(raw: &'a [u8]) -> Result<NetworkAdapter<'a>, &str> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_version`
[INFO] [stdout]   --> src/network.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_version(&self) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_length`
[INFO] [stdout]   --> src/network.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn get_length(&self) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_data`
[INFO] [stdout]   --> src/network.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn get_data(&self) -> &'a [u8] {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_u32`
[INFO] [stdout]   --> src/network.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn read_u32(data: &[u8]) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `find_match`
[INFO] [stdout]   --> src/main.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn find_match(stream: &mut TcpStream) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> src/main.rs:17:36
[INFO] [stdout]    |
[INFO] [stdout] 17 |     for (r_idx, row) in game.board.into_iter().enumerate() {
[INFO] [stdout]    |                                    ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |             connect_to_server();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `Command { std: "docker" "inspect" "57ee0d54e5c384ffef7ae36a8a1fac17de7d714f9abe5b3dbc5ba992fb4006b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57ee0d54e5c384ffef7ae36a8a1fac17de7d714f9abe5b3dbc5ba992fb4006b6", kill_on_drop: false }`
[INFO] [stdout] 57ee0d54e5c384ffef7ae36a8a1fac17de7d714f9abe5b3dbc5ba992fb4006b6
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4a4c65c81123f6924397a541cf4651885c3a420150597af894477164b97a0831
[INFO] running `Command { std: "docker" "start" "-a" "4a4c65c81123f6924397a541cf4651885c3a420150597af894477164b97a0831", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/tic_tac_toe.rs:132:22
[INFO] [stderr]     |
[INFO] [stderr] 132 |         let player = try!(self.get_current_player());
[INFO] [stderr]     |                      ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/tic_tac_toe.rs:133:22
[INFO] [stderr]     |
[INFO] [stderr] 133 |         let (x, y) = try!(self.parse_position_string(pos));
[INFO] [stderr]     |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/tic_tac_toe.rs:134:9
[INFO] [stderr]     |
[INFO] [stderr] 134 |         try!(self.add_to_board(player, x, y));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/tic_tac_toe.rs:135:9
[INFO] [stderr]     |
[INFO] [stderr] 135 |         try!(self.switch_players());
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:50:22
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let mut stream = try!(TcpStream::connect(server));
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     try!(stream.set_nonblocking(true));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/network.rs:32:40
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let end = cmp::min(8 + length, (self.raw.len() as u32));
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let mut stream = try!(TcpStream::connect(server));
[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: struct is never constructed: `NetworkAdapter`
[INFO] [stderr]  --> src/network.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct NetworkAdapter<'a> {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/network.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn new(raw: &'a [u8]) -> Result<NetworkAdapter<'a>, &str> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_version`
[INFO] [stderr]   --> src/network.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn get_version(&self) -> u32 {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_length`
[INFO] [stderr]   --> src/network.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn get_length(&self) -> u32 {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_data`
[INFO] [stderr]   --> src/network.rs:30:12
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn get_data(&self) -> &'a [u8] {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_u32`
[INFO] [stderr]   --> src/network.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn read_u32(data: &[u8]) -> u32 {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `find_match`
[INFO] [stderr]   --> src/main.rs:57:4
[INFO] [stderr]    |
[INFO] [stderr] 57 | fn find_match(stream: &mut TcpStream) {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]   --> src/main.rs:17:36
[INFO] [stderr]    |
[INFO] [stderr] 17 |     for (r_idx, row) in game.board.into_iter().enumerate() {
[INFO] [stderr]    |                                    ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:96:13
[INFO] [stderr]    |
[INFO] [stderr] 96 |             connect_to_server();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 18 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1m 11s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/tictactoe-fcaaba13429feb13
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/tictactoe-083c3573c558ebc1
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tictactoe
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4a4c65c81123f6924397a541cf4651885c3a420150597af894477164b97a0831", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a4c65c81123f6924397a541cf4651885c3a420150597af894477164b97a0831", kill_on_drop: false }`
[INFO] [stdout] 4a4c65c81123f6924397a541cf4651885c3a420150597af894477164b97a0831