[INFO] cloning repository https://github.com/MutantBaby/Rust-By-Practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MutantBaby/Rust-By-Practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMutantBaby%2FRust-By-Practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMutantBaby%2FRust-By-Practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c2b7f6e6489efe9f6c37dd4afa2e55d207d14f2f
[INFO] checking MutantBaby/Rust-By-Practice against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMutantBaby%2FRust-By-Practice" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MutantBaby/Rust-By-Practice 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/MutantBaby/Rust-By-Practice
[INFO] finished tweaking git repo https://github.com/MutantBaby/Rust-By-Practice
[INFO] tweaked toml for git repo https://github.com/MutantBaby/Rust-By-Practice written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/MutantBaby/Rust-By-Practice 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror-impl v1.0.52
[INFO] [stderr]   Downloaded thiserror v1.0.52
[INFO] [stderr]   Downloaded utf8_slice v1.0.0
[INFO] [stderr]   Downloaded confy v0.5.1
[INFO] [stderr]   Downloaded ctrlc v3.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 61ec94d0cbd1c36347b37ead1979a04a29a19845c9f9afa6ac1afa1b0c59e535
[INFO] running `Command { std: "docker" "start" "-a" "61ec94d0cbd1c36347b37ead1979a04a29a19845c9f9afa6ac1afa1b0c59e535", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61ec94d0cbd1c36347b37ead1979a04a29a19845c9f9afa6ac1afa1b0c59e535", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61ec94d0cbd1c36347b37ead1979a04a29a19845c9f9afa6ac1afa1b0c59e535", kill_on_drop: false }`
[INFO] [stdout] 61ec94d0cbd1c36347b37ead1979a04a29a19845c9f9afa6ac1afa1b0c59e535
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 3a21e054ebd0752001a022553f5c8520dbd62b13af48e04aa55ecbb5ff2ef9fd
[INFO] running `Command { std: "docker" "start" "-a" "3a21e054ebd0752001a022553f5c8520dbd62b13af48e04aa55ecbb5ff2ef9fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling proc-macro2 v1.0.71
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling serde v1.0.193
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling thiserror v1.0.52
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]     Checking smallvec v1.11.2
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]    Compiling serde_json v1.0.108
[INFO] [stderr]    Compiling anyhow v1.0.77
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]     Checking bytes v1.5.0
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]     Checking ryu v1.0.16
[INFO] [stderr]     Checking exitcode v1.1.2
[INFO] [stderr]     Checking utf8_slice v1.0.0
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]     Checking crossbeam-channel v0.5.10
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.43
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking nix v0.27.1
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]     Checking mio v0.8.9
[INFO] [stderr]     Checking directories v4.0.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]     Checking ctrlc v3.4.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.52
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.193
[INFO] [stderr]     Checking tokio v1.35.1
[INFO] [stderr]     Checking confy v0.5.1
[INFO] [stderr]     Checking rust-practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.59s
[INFO] running `Command { std: "docker" "inspect" "3a21e054ebd0752001a022553f5c8520dbd62b13af48e04aa55ecbb5ff2ef9fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a21e054ebd0752001a022553f5c8520dbd62b13af48e04aa55ecbb5ff2ef9fd", kill_on_drop: false }`
[INFO] [stdout] 3a21e054ebd0752001a022553f5c8520dbd62b13af48e04aa55ecbb5ff2ef9fd