[INFO] cloning repository https://github.com/sunjay/connect4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sunjay/connect4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsunjay%2Fconnect4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsunjay%2Fconnect4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 383eafb4ded5c4d4639b794f1e9b0dd90a2709e5
[INFO] checking sunjay/connect4 against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsunjay%2Fconnect4" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sunjay/connect4 on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sunjay/connect4
[INFO] finished tweaking git repo https://github.com/sunjay/connect4
[INFO] tweaked toml for git repo https://github.com/sunjay/connect4 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/sunjay/connect4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e47ad74bb82002118cc8c8774894a84d3508409cf488d6b453e97d28bb270066
[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" "e47ad74bb82002118cc8c8774894a84d3508409cf488d6b453e97d28bb270066", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e47ad74bb82002118cc8c8774894a84d3508409cf488d6b453e97d28bb270066", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e47ad74bb82002118cc8c8774894a84d3508409cf488d6b453e97d28bb270066", kill_on_drop: false }`
[INFO] [stdout] e47ad74bb82002118cc8c8774894a84d3508409cf488d6b453e97d28bb270066
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25a9fb79185b5ceef11bf0b2755b4c0173011f28835523cf609e2da2349a20e8
[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" "25a9fb79185b5ceef11bf0b2755b4c0173011f28835523cf609e2da2349a20e8", kill_on_drop: false }`
[INFO] [stderr]     Checking connect4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/connect4.rs:126:58
[INFO] [stdout]     |
[INFO] [stdout] 126 |             for (i, dir) in [N, NE, E, SE, S, SW, W, NW].into_iter().enumerate() {
[INFO] [stdout]     |                                                          ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 126 |             for (i, dir) in [N, NE, E, SE, S, SW, W, NW].iter().enumerate() {
[INFO] [stdout]     |                                                          ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 126 |             for (i, dir) in IntoIterator::into_iter([N, NE, E, SE, S, SW, W, NW]).enumerate() {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^                            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/connect4.rs:133:33
[INFO] [stdout]     |
[INFO] [stdout] 133 |         for found in directions.into_iter() {
[INFO] [stdout]     |                                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 133 |         for found in directions.iter() {
[INFO] [stdout]     |                                 ^^^^
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 133 |         for found in directions {
[INFO] [stdout]     |                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]   --> src/main.rs:71:62
[INFO] [stdout]    |
[INFO] [stdout] 71 |     println!("\n{}  \n", ["A", "B", "C", "D", "E", "F", "G"].into_iter().fold(String::new(), |acc, s| {
[INFO] [stdout]    |                                                              ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 71 |     println!("\n{}  \n", ["A", "B", "C", "D", "E", "F", "G"].iter().fold(String::new(), |acc, s| {
[INFO] [stdout]    |                                                              ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 71 |     println!("\n{}  \n", IntoIterator::into_iter(["A", "B", "C", "D", "E", "F", "G"]).fold(String::new(), |acc, s| {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^                                   ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/connect4.rs:126:58
[INFO] [stdout]     |
[INFO] [stdout] 126 |             for (i, dir) in [N, NE, E, SE, S, SW, W, NW].into_iter().enumerate() {
[INFO] [stdout]     |                                                          ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 126 |             for (i, dir) in [N, NE, E, SE, S, SW, W, NW].iter().enumerate() {
[INFO] [stdout]     |                                                          ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 126 |             for (i, dir) in IntoIterator::into_iter([N, NE, E, SE, S, SW, W, NW]).enumerate() {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^                            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/connect4.rs:133:33
[INFO] [stdout]     |
[INFO] [stdout] 133 |         for found in directions.into_iter() {
[INFO] [stdout]     |                                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 133 |         for found in directions.iter() {
[INFO] [stdout]     |                                 ^^^^
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 133 |         for found in directions {
[INFO] [stdout]     |                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]   --> src/main.rs:71:62
[INFO] [stdout]    |
[INFO] [stdout] 71 |     println!("\n{}  \n", ["A", "B", "C", "D", "E", "F", "G"].into_iter().fold(String::new(), |acc, s| {
[INFO] [stdout]    |                                                              ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 71 |     println!("\n{}  \n", ["A", "B", "C", "D", "E", "F", "G"].iter().fold(String::new(), |acc, s| {
[INFO] [stdout]    |                                                              ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 71 |     println!("\n{}  \n", IntoIterator::into_iter(["A", "B", "C", "D", "E", "F", "G"]).fold(String::new(), |acc, s| {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^                                   ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "25a9fb79185b5ceef11bf0b2755b4c0173011f28835523cf609e2da2349a20e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25a9fb79185b5ceef11bf0b2755b4c0173011f28835523cf609e2da2349a20e8", kill_on_drop: false }`
[INFO] [stdout] 25a9fb79185b5ceef11bf0b2755b4c0173011f28835523cf609e2da2349a20e8