[INFO] cloning repository https://github.com/Berteun/rust-toy-list
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Berteun/rust-toy-list" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBerteun%2Frust-toy-list", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBerteun%2Frust-toy-list'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8c02b9732a93b89c6528d053069dafac7f7b6bfe
[INFO] testing Berteun/rust-toy-list against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBerteun%2Frust-toy-list" "/workspace/builds/worker-16/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-16/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Berteun/rust-toy-list on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Berteun/rust-toy-list
[INFO] finished tweaking git repo https://github.com/Berteun/rust-toy-list
[INFO] tweaked toml for git repo https://github.com/Berteun/rust-toy-list written to /workspace/builds/worker-16/source/Cargo.toml
[INFO] crate git repo https://github.com/Berteun/rust-toy-list already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] acf7bcc48041a0431d579eef5d920f9931190d098b3b9569a1ca95d173a2c17a
[INFO] running `Command { std: "docker" "start" "-a" "acf7bcc48041a0431d579eef5d920f9931190d098b3b9569a1ca95d173a2c17a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "acf7bcc48041a0431d579eef5d920f9931190d098b3b9569a1ca95d173a2c17a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acf7bcc48041a0431d579eef5d920f9931190d098b3b9569a1ca95d173a2c17a", kill_on_drop: false }`
[INFO] [stdout] acf7bcc48041a0431d579eef5d920f9931190d098b3b9569a1ca95d173a2c17a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f93df1a64474a1d203a7b14a68fbbf51a551c856304f528532c059fc8984dc3
[INFO] running `Command { std: "docker" "start" "-a" "2f93df1a64474a1d203a7b14a68fbbf51a551c856304f528532c059fc8984dc3", kill_on_drop: false }`
[INFO] [stderr]    Compiling reverse v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stdout]   --> src/list/mod.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn first(&self) -> Option<&Node<T>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(private_in_public)]` 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 #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stdout]   --> src/list/mod.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn last(&self) -> Option<&Node<T>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[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 #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/list/mod.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |         mem::replace(self, new_list);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "2f93df1a64474a1d203a7b14a68fbbf51a551c856304f528532c059fc8984dc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f93df1a64474a1d203a7b14a68fbbf51a551c856304f528532c059fc8984dc3", kill_on_drop: false }`
[INFO] [stdout] 2f93df1a64474a1d203a7b14a68fbbf51a551c856304f528532c059fc8984dc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c002f962b707feb8ce514e7d170a3d51331abe72ae4d23554866a3ca313a3cbd
[INFO] running `Command { std: "docker" "start" "-a" "c002f962b707feb8ce514e7d170a3d51331abe72ae4d23554866a3ca313a3cbd", kill_on_drop: false }`
[INFO] [stderr]    Compiling reverse v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stdout]   --> src/list/mod.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn first(&self) -> Option<&Node<T>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(private_in_public)]` 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 #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stdout]   --> src/list/mod.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn last(&self) -> Option<&Node<T>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[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 #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/list/mod.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |         mem::replace(self, new_list);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "c002f962b707feb8ce514e7d170a3d51331abe72ae4d23554866a3ca313a3cbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c002f962b707feb8ce514e7d170a3d51331abe72ae4d23554866a3ca313a3cbd", kill_on_drop: false }`
[INFO] [stdout] c002f962b707feb8ce514e7d170a3d51331abe72ae4d23554866a3ca313a3cbd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6f0889effaa6b5685f7502adec7b38da305b5cb695ffaa21c773aae76b37733b
[INFO] running `Command { std: "docker" "start" "-a" "6f0889effaa6b5685f7502adec7b38da305b5cb695ffaa21c773aae76b37733b", kill_on_drop: false }`
[INFO] [stderr] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stderr]   --> src/list/mod.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn first(&self) -> Option<&Node<T>>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(private_in_public)]` 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 #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stderr]   --> src/list/mod.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn last(&self) -> Option<&Node<T>>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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 #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/list/mod.rs:110:9
[INFO] [stderr]     |
[INFO] [stderr] 110 |         mem::replace(self, new_list);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: `reverse` (bin "reverse" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/reverse-01e51440a4ffb6fa)
[INFO] [stdout] running 12 tests
[INFO] [stdout] test list::test_last_prepend ... ok
[INFO] [stdout] test list::test_last_singleton ... ok
[INFO] [stdout] test list::create_node_and_prepend ... ok
[INFO] [stdout] test list::create_node_and_append ... ok
[INFO] [stdout] test list::test_drop_singleton ... ok
[INFO] [stdout] test list::test_reverse_singleton ... ok
[INFO] [stdout] test list::test_drop ... ok
[INFO] [stdout] test list::test_length ... ok
[INFO] [stdout] test list::test_last ... ok
[INFO] [stdout] test list::test_last_append_prepend ... ok
[INFO] [stdout] test list::create_node ... ok
[INFO] [stdout] test list::test_reverse_longer ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6f0889effaa6b5685f7502adec7b38da305b5cb695ffaa21c773aae76b37733b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f0889effaa6b5685f7502adec7b38da305b5cb695ffaa21c773aae76b37733b", kill_on_drop: false }`
[INFO] [stdout] 6f0889effaa6b5685f7502adec7b38da305b5cb695ffaa21c773aae76b37733b