[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#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMutantBaby%2FRust-By-Practice" "/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/MutantBaby/Rust-By-Practice on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "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-4-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded utf8_slice v1.0.0
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 64507955e47e33172c9cb8cfff94a8ba6eb06a3a9b5c049371eed02bbc28fbf9
[INFO] running `Command { std: "docker" "start" "-a" "64507955e47e33172c9cb8cfff94a8ba6eb06a3a9b5c049371eed02bbc28fbf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64507955e47e33172c9cb8cfff94a8ba6eb06a3a9b5c049371eed02bbc28fbf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64507955e47e33172c9cb8cfff94a8ba6eb06a3a9b5c049371eed02bbc28fbf9", kill_on_drop: false }`
[INFO] [stdout] 64507955e47e33172c9cb8cfff94a8ba6eb06a3a9b5c049371eed02bbc28fbf9
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 610673f65ac60ba405a85c91c835fa51aab7639237a76131248f03436119efb4
[INFO] running `Command { std: "docker" "start" "-a" "610673f65ac60ba405a85c91c835fa51aab7639237a76131248f03436119efb4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.71
[INFO] [stderr]    Compiling serde v1.0.193
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]    Compiling thiserror v1.0.52
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]    Compiling anyhow v1.0.77
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]    Compiling serde_json v1.0.108
[INFO] [stderr]     Checking nix v0.27.1
[INFO] [stderr]     Checking directories v4.0.1
[INFO] [stderr]     Checking mio v0.8.9
[INFO] [stderr]     Checking itoa v1.0.10
[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 quote v1.0.33
[INFO] [stderr]     Checking crossbeam-channel v0.5.10
[INFO] [stderr]    Compiling syn v2.0.43
[INFO] [stderr]     Checking ctrlc v3.4.2
[INFO] [stderr]     Checking toml v0.5.11
[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 5.37s
[INFO] running `Command { std: "docker" "inspect" "610673f65ac60ba405a85c91c835fa51aab7639237a76131248f03436119efb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "610673f65ac60ba405a85c91c835fa51aab7639237a76131248f03436119efb4", kill_on_drop: false }`
[INFO] [stdout] 610673f65ac60ba405a85c91c835fa51aab7639237a76131248f03436119efb4
[INFO] checking MutantBaby/Rust-By-Practice against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMutantBaby%2FRust-By-Practice" "/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/MutantBaby/Rust-By-Practice on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "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-4-tc2/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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0872a5392223a944d4835de1b63812b44720baffec58e976a57c3d670b462bb6
[INFO] running `Command { std: "docker" "start" "-a" "0872a5392223a944d4835de1b63812b44720baffec58e976a57c3d670b462bb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0872a5392223a944d4835de1b63812b44720baffec58e976a57c3d670b462bb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0872a5392223a944d4835de1b63812b44720baffec58e976a57c3d670b462bb6", kill_on_drop: false }`
[INFO] [stdout] 0872a5392223a944d4835de1b63812b44720baffec58e976a57c3d670b462bb6
[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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9bcb0b86210573e6f309f713364c8ed290463bbcce9d4a4b5156a7c961a6aa0
[INFO] running `Command { std: "docker" "start" "-a" "f9bcb0b86210573e6f309f713364c8ed290463bbcce9d4a4b5156a7c961a6aa0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.71
[INFO] [stderr]    Compiling serde v1.0.193
[INFO] [stderr]    Compiling thiserror v1.0.52
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/signal-hook-registry-1.4.1/src/half_lock.rs:145:13
[INFO] [stdout]     |
[INFO] [stdout] 145 |             unsafe { libc::abort() };
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling anyhow v1.0.77
[INFO] [stderr] error: could not compile `signal-hook-registry` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f9bcb0b86210573e6f309f713364c8ed290463bbcce9d4a4b5156a7c961a6aa0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9bcb0b86210573e6f309f713364c8ed290463bbcce9d4a4b5156a7c961a6aa0", kill_on_drop: false }`
[INFO] [stdout] f9bcb0b86210573e6f309f713364c8ed290463bbcce9d4a4b5156a7c961a6aa0