[INFO] cloning repository https://github.com/zveroboy/exercism-2022
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zveroboy/exercism-2022" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzveroboy%2Fexercism-2022", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzveroboy%2Fexercism-2022'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 82956abb2c7b083086b562a4f3a31b99bc1ec515
[INFO] checking zveroboy/exercism-2022 against nightly-2024-02-05 for check-cfg-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzveroboy%2Fexercism-2022" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zveroboy/exercism-2022 on toolchain nightly-2024-02-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zveroboy/exercism-2022
[INFO] finished tweaking git repo https://github.com/zveroboy/exercism-2022
[INFO] tweaked toml for git repo https://github.com/zveroboy/exercism-2022 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/zveroboy/exercism-2022 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded time-core v0.1.0
[INFO] [stderr]   Downloaded serde v1.0.159
[INFO] [stderr]   Downloaded time v0.3.20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e41ef24facbdf66c40da75bdfdde9761eeffb217b0ac44aea3e48df3392fff2
[INFO] running `Command { std: "docker" "start" "-a" "9e41ef24facbdf66c40da75bdfdde9761eeffb217b0ac44aea3e48df3392fff2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e41ef24facbdf66c40da75bdfdde9761eeffb217b0ac44aea3e48df3392fff2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e41ef24facbdf66c40da75bdfdde9761eeffb217b0ac44aea3e48df3392fff2", kill_on_drop: false }`
[INFO] [stdout] 9e41ef24facbdf66c40da75bdfdde9761eeffb217b0ac44aea3e48df3392fff2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 958243f5d719a5d950d5d2029d365d1a8af8f9a92ce26072492e4072986df449
[INFO] running `Command { std: "docker" "start" "-a" "958243f5d719a5d950d5d2029d365d1a8af8f9a92ce26072492e4072986df449", kill_on_drop: false }`
[INFO] [stderr]     Checking time-core v0.1.0
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stderr]     Checking time v0.3.20
[INFO] [stderr]     Checking exercism_2022 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `align_of`, `borrow::BorrowMut`, `size_of`
[INFO] [stdout]  --> tests/parallel_letter_frequency.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{borrow::BorrowMut, collections::HashMap, mem::{size_of, align_of}, rc::Rc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^                              ^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S1` should have a snake case name
[INFO] [stdout]    --> tests/parallel_letter_frequency.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |     let S1 = String::from("bbb");
[INFO] [stdout]     |         ^^ help: convert the identifier to snake case (notice the capitalization): `s1`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Rc1` should have a snake case name
[INFO] [stdout]    --> tests/parallel_letter_frequency.rs:176:9
[INFO] [stdout]     |
[INFO] [stdout] 176 |     let Rc1 = Rc::new(String::from("ccc"));
[INFO] [stdout]     |         ^^^ help: convert the identifier to snake case: `rc1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.71s
[INFO] running `Command { std: "docker" "inspect" "958243f5d719a5d950d5d2029d365d1a8af8f9a92ce26072492e4072986df449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "958243f5d719a5d950d5d2029d365d1a8af8f9a92ce26072492e4072986df449", kill_on_drop: false }`
[INFO] [stdout] 958243f5d719a5d950d5d2029d365d1a8af8f9a92ce26072492e4072986df449
[INFO] checking zveroboy/exercism-2022 against nightly-2024-02-05+rustflags=-Dunexpected_cfgs+cargoflags=-Zcheck-cfg for check-cfg-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzveroboy%2Fexercism-2022" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zveroboy/exercism-2022 on toolchain nightly-2024-02-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zveroboy/exercism-2022
[INFO] finished tweaking git repo https://github.com/zveroboy/exercism-2022
[INFO] tweaked toml for git repo https://github.com/zveroboy/exercism-2022 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/zveroboy/exercism-2022 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7bcc8b1b0a2291b278af7abab804cd8835d2994e9a4bf24a24614ee58d0fe47f
[INFO] running `Command { std: "docker" "start" "-a" "7bcc8b1b0a2291b278af7abab804cd8835d2994e9a4bf24a24614ee58d0fe47f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7bcc8b1b0a2291b278af7abab804cd8835d2994e9a4bf24a24614ee58d0fe47f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bcc8b1b0a2291b278af7abab804cd8835d2994e9a4bf24a24614ee58d0fe47f", kill_on_drop: false }`
[INFO] [stdout] 7bcc8b1b0a2291b278af7abab804cd8835d2994e9a4bf24a24614ee58d0fe47f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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 -Dunexpected_cfgs" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "check" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zcheck-cfg", kill_on_drop: false }`
[INFO] [stdout] 78443444b8b5908fb03233c7b3c5302b9141f7e58a258b51203bdeedc54f2f20
[INFO] running `Command { std: "docker" "start" "-a" "78443444b8b5908fb03233c7b3c5302b9141f7e58a258b51203bdeedc54f2f20", kill_on_drop: false }`
[INFO] [stderr]     Checking time-core v0.1.0
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stderr]     Checking time v0.3.20
[INFO] [stderr]     Checking exercism_2022 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: unexpected `cfg` condition value: `add-a-variant`
[INFO] [stdout]   --> src/exercises/semi_structured_logs.rs:72:7
[INFO] [stdout]    |
[INFO] [stdout] 72 | #[cfg(feature = "add-a-variant")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `grapheme`
[INFO] [stdout]    = help: consider adding `add-a-variant` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#check-cfg> for more information about checking conditional configuration
[INFO] [stdout]    = note: requested on the command line with `-D unexpected-cfgs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected `cfg` condition value: `add-a-variant`
[INFO] [stdout]   --> src/exercises/semi_structured_logs.rs:72:7
[INFO] [stdout]    |
[INFO] [stdout] 72 | #[cfg(feature = "add-a-variant")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `grapheme`
[INFO] [stdout]    = help: consider adding `add-a-variant` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#check-cfg> for more information about checking conditional configuration
[INFO] [stdout]    = note: requested on the command line with `-D unexpected-cfgs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercism_2022` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercism_2022` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "78443444b8b5908fb03233c7b3c5302b9141f7e58a258b51203bdeedc54f2f20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78443444b8b5908fb03233c7b3c5302b9141f7e58a258b51203bdeedc54f2f20", kill_on_drop: false }`
[INFO] [stdout] 78443444b8b5908fb03233c7b3c5302b9141f7e58a258b51203bdeedc54f2f20