[INFO] cloning repository https://github.com/crispim1411/skiplist
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/crispim1411/skiplist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrispim1411%2Fskiplist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrispim1411%2Fskiplist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e4355481c6ef415780d13c3ba680eb8a20e25304
[INFO] testing crispim1411/skiplist against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrispim1411%2Fskiplist" "/workspace/builds/worker-89/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-89/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/crispim1411/skiplist on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/crispim1411/skiplist
[INFO] finished tweaking git repo https://github.com/crispim1411/skiplist
[INFO] tweaked toml for git repo https://github.com/crispim1411/skiplist written to /workspace/builds/worker-89/source/Cargo.toml
[INFO] crate git repo https://github.com/crispim1411/skiplist already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f8b367d9e515225ee6c30cad33d74de6ced1d83a27cc77b2b07b68e19d94df52
[INFO] running `Command { std: "docker" "start" "-a" "f8b367d9e515225ee6c30cad33d74de6ced1d83a27cc77b2b07b68e19d94df52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f8b367d9e515225ee6c30cad33d74de6ced1d83a27cc77b2b07b68e19d94df52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8b367d9e515225ee6c30cad33d74de6ced1d83a27cc77b2b07b68e19d94df52", kill_on_drop: false }`
[INFO] [stdout] f8b367d9e515225ee6c30cad33d74de6ced1d83a27cc77b2b07b68e19d94df52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb1649ea7685a816e21a8767eff49e13b508555860a65c525b5da7d0b83a60e4
[INFO] running `Command { std: "docker" "start" "-a" "cb1649ea7685a816e21a8767eff49e13b508555860a65c525b5da7d0b83a60e4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling skiplist v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `level`
[INFO] [stdout]   --> src/skiplist.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     level: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `SkipList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/skiplist.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.77s
[INFO] running `Command { std: "docker" "inspect" "cb1649ea7685a816e21a8767eff49e13b508555860a65c525b5da7d0b83a60e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb1649ea7685a816e21a8767eff49e13b508555860a65c525b5da7d0b83a60e4", kill_on_drop: false }`
[INFO] [stdout] cb1649ea7685a816e21a8767eff49e13b508555860a65c525b5da7d0b83a60e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ef801b7844e33efc00a176eb0e19073bd21f6b45ecb57183c84dad67840b1a6
[INFO] running `Command { std: "docker" "start" "-a" "2ef801b7844e33efc00a176eb0e19073bd21f6b45ecb57183c84dad67840b1a6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: field is never read: `level`
[INFO] [stdout]   --> src/skiplist.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     level: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `SkipList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/skiplist.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling skiplist v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `level`
[INFO] [stdout]   --> src/skiplist.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     level: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `SkipList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/skiplist.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.96s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/skiplist-d850715179040276)
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/skiplist-551ea5187a7d06f1)
[INFO] running `Command { std: "docker" "inspect" "2ef801b7844e33efc00a176eb0e19073bd21f6b45ecb57183c84dad67840b1a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ef801b7844e33efc00a176eb0e19073bd21f6b45ecb57183c84dad67840b1a6", kill_on_drop: false }`
[INFO] [stdout] 2ef801b7844e33efc00a176eb0e19073bd21f6b45ecb57183c84dad67840b1a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4ba5a54e34e290293b143e9bb02bc463beea60b8e9830f3f4155b3377b6e95d2
[INFO] running `Command { std: "docker" "start" "-a" "4ba5a54e34e290293b143e9bb02bc463beea60b8e9830f3f4155b3377b6e95d2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: field is never read: `level`
[INFO] [stderr]   --> src/skiplist.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     level: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `SkipList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/skiplist.rs:13:10
[INFO] [stderr]    |
[INFO] [stderr] 13 | #[derive(Debug)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `skiplist` (lib) generated 1 warning
[INFO] [stderr] warning: `skiplist` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 28.69s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/skiplist-d850715179040276)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test linked_list::tests::delete_test ... ok
[INFO] [stdout] test linked_list::tests::get_ref_test ... ok
[INFO] [stdout] test linked_list::tests::delete_one_item_test ... ok
[INFO] [stdout] test linked_list::tests::insert_test ... ok
[INFO] [stdout] test linked_list::tests::is_empty_test ... ok
[INFO] [stdout] test linked_list::tests::iter_test ... ok
[INFO] [stdout] test stack::tests::is_empty_test ... ok
[INFO] [stdout] test stack::tests::pop_item_test ... ok
[INFO] [stdout] test stack::tests::push_item_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/skiplist-551ea5187a7d06f1)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests skiplist
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4ba5a54e34e290293b143e9bb02bc463beea60b8e9830f3f4155b3377b6e95d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ba5a54e34e290293b143e9bb02bc463beea60b8e9830f3f4155b3377b6e95d2", kill_on_drop: false }`
[INFO] [stdout] 4ba5a54e34e290293b143e9bb02bc463beea60b8e9830f3f4155b3377b6e95d2