[INFO] cloning repository https://github.com/deliro/codewars
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/deliro/codewars" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeliro%2Fcodewars", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeliro%2Fcodewars'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ca3ec445813ebdb7fe83c10953529a0697e8ecf
[INFO] checking deliro/codewars against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeliro%2Fcodewars" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/deliro/codewars on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/deliro/codewars
[INFO] finished tweaking git repo https://github.com/deliro/codewars
[INFO] tweaked toml for git repo https://github.com/deliro/codewars written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/deliro/codewars 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v2.0.33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef0869b30e9322680035686b2a04f6d90362f0498e08d08f9aab0cff7bc277d0
[INFO] running `Command { std: "docker" "start" "-a" "ef0869b30e9322680035686b2a04f6d90362f0498e08d08f9aab0cff7bc277d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef0869b30e9322680035686b2a04f6d90362f0498e08d08f9aab0cff7bc277d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef0869b30e9322680035686b2a04f6d90362f0498e08d08f9aab0cff7bc277d0", kill_on_drop: false }`
[INFO] [stdout] ef0869b30e9322680035686b2a04f6d90362f0498e08d08f9aab0cff7bc277d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a98ba46dab23775eefe9dd12005882dac963f9081824ee5434bb781cfef17aef
[INFO] running `Command { std: "docker" "start" "-a" "a98ba46dab23775eefe9dd12005882dac963f9081824ee5434bb781cfef17aef", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]     Checking memchr v2.6.3
[INFO] [stderr]     Checking tracing-core v0.1.31
[INFO] [stderr]    Compiling openssl v0.10.57
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]     Checking http v0.2.9
[INFO] [stderr]     Checking bitflags v2.4.0
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking httpdate v1.0.3
[INFO] [stderr]     Checking anstyle v1.0.3
[INFO] [stderr]    Compiling syn v2.0.33
[INFO] [stderr]     Checking aho-corasick v1.0.5
[INFO] [stderr]     Checking anstream v0.5.0
[INFO] [stderr]     Checking http-body v0.4.5
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking socket2 v0.5.4
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking clap_lex v0.5.1
[INFO] [stderr]     Checking tokio v1.32.0
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking clap_builder v4.4.2
[INFO] [stderr]     Checking url v2.4.1
[INFO] [stderr]    Compiling openssl-sys v0.9.93
[INFO] [stderr]     Checking encoding_rs v0.8.33
[INFO] [stderr]     Checking base64 v0.21.4
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking regex-automata v0.3.8
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling clap_derive v4.4.2
[INFO] [stderr]     Checking tokio-util v0.7.8
[INFO] [stderr]     Checking regex v1.9.5
[INFO] [stderr]     Checking h2 v0.3.21
[INFO] [stderr]     Checking clap v4.4.3
[INFO] [stderr]     Checking hyper v0.14.27
[INFO] [stderr]     Checking tokio-native-tls v0.3.1
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.20
[INFO] [stderr]     Checking codewars v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |     CargoFailed(String),
[INFO] [stdout]    |     ----------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 33 |     CargoFailed(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |     CargoFailed(String),
[INFO] [stdout]    |     ----------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 33 |     CargoFailed(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 40.69s
[INFO] running `Command { std: "docker" "inspect" "a98ba46dab23775eefe9dd12005882dac963f9081824ee5434bb781cfef17aef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a98ba46dab23775eefe9dd12005882dac963f9081824ee5434bb781cfef17aef", kill_on_drop: false }`
[INFO] [stdout] a98ba46dab23775eefe9dd12005882dac963f9081824ee5434bb781cfef17aef
[INFO] checking deliro/codewars against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeliro%2Fcodewars" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/deliro/codewars on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/deliro/codewars
[INFO] finished tweaking git repo https://github.com/deliro/codewars
[INFO] tweaked toml for git repo https://github.com/deliro/codewars written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/deliro/codewars 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a21fae9fdafc8a3dbe912610e3517fe4ed88aefce0f11987249bf87b1e5fb968
[INFO] running `Command { std: "docker" "start" "-a" "a21fae9fdafc8a3dbe912610e3517fe4ed88aefce0f11987249bf87b1e5fb968", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a21fae9fdafc8a3dbe912610e3517fe4ed88aefce0f11987249bf87b1e5fb968", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a21fae9fdafc8a3dbe912610e3517fe4ed88aefce0f11987249bf87b1e5fb968", kill_on_drop: false }`
[INFO] [stdout] a21fae9fdafc8a3dbe912610e3517fe4ed88aefce0f11987249bf87b1e5fb968
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e0d44b3d9747093d89c94d19da0c7ea65b8c4e621bff627f4c5d0dacbc4af75
[INFO] running `Command { std: "docker" "start" "-a" "1e0d44b3d9747093d89c94d19da0c7ea65b8c4e621bff627f4c5d0dacbc4af75", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]     Checking memchr v2.6.3
[INFO] [stderr]     Checking tracing-core v0.1.31
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling openssl v0.10.57
[INFO] [stderr]     Checking http v0.2.9
[INFO] [stderr]     Checking bitflags v2.4.0
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking http-body v0.4.5
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking anstyle v1.0.3
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]     Checking httpdate v1.0.3
[INFO] [stderr]    Compiling syn v2.0.33
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.5.4
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking anstream v0.5.0
[INFO] [stderr]     Checking aho-corasick v1.0.5
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking clap_lex v0.5.1
[INFO] [stderr]     Checking tokio v1.32.0
[INFO] [stderr]     Checking clap_builder v4.4.2
[INFO] [stderr]    Compiling openssl-sys v0.9.93
[INFO] [stderr]     Checking url v2.4.1
[INFO] [stderr]     Checking encoding_rs v0.8.33
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking base64 v0.21.4
[INFO] [stderr]     Checking regex-automata v0.3.8
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling clap_derive v4.4.2
[INFO] [stderr]     Checking tokio-util v0.7.8
[INFO] [stderr]     Checking regex v1.9.5
[INFO] [stderr]     Checking h2 v0.3.21
[INFO] [stderr]     Checking clap v4.4.3
[INFO] [stderr]     Checking hyper v0.14.27
[INFO] [stderr]     Checking tokio-native-tls v0.3.1
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.20
[INFO] [stderr]     Checking codewars v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |     CargoFailed(String),
[INFO] [stdout]    |     ----------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 33 |     CargoFailed(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |     CargoFailed(String),
[INFO] [stdout]    |     ----------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 33 |     CargoFailed(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 45.00s
[INFO] running `Command { std: "docker" "inspect" "1e0d44b3d9747093d89c94d19da0c7ea65b8c4e621bff627f4c5d0dacbc4af75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e0d44b3d9747093d89c94d19da0c7ea65b8c4e621bff627f4c5d0dacbc4af75", kill_on_drop: false }`
[INFO] [stdout] 1e0d44b3d9747093d89c94d19da0c7ea65b8c4e621bff627f4c5d0dacbc4af75