[INFO] cloning repository https://github.com/rhapsodyn/rust-advent-of-code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rhapsodyn/rust-advent-of-code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frhapsodyn%2Frust-advent-of-code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frhapsodyn%2Frust-advent-of-code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4780f63c8b5afa272e8028c51b63d0c6fa0aa755
[INFO] checking rhapsodyn/rust-advent-of-code against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frhapsodyn%2Frust-advent-of-code" "/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/rhapsodyn/rust-advent-of-code 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/rhapsodyn/rust-advent-of-code
[INFO] finished tweaking git repo https://github.com/rhapsodyn/rust-advent-of-code
[INFO] tweaked toml for git repo https://github.com/rhapsodyn/rust-advent-of-code written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rhapsodyn/rust-advent-of-code 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] 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] 633d128664adb5e9065852a0450ae0c1219b736c32978e8f341d4ef961b77bbe
[INFO] running `Command { std: "docker" "start" "-a" "633d128664adb5e9065852a0450ae0c1219b736c32978e8f341d4ef961b77bbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "633d128664adb5e9065852a0450ae0c1219b736c32978e8f341d4ef961b77bbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "633d128664adb5e9065852a0450ae0c1219b736c32978e8f341d4ef961b77bbe", kill_on_drop: false }`
[INFO] [stdout] 633d128664adb5e9065852a0450ae0c1219b736c32978e8f341d4ef961b77bbe
[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] 8e03469a254123ee3b41c3dcb655144edc1f239a42749803682d6292482a1957
[INFO] running `Command { std: "docker" "start" "-a" "8e03469a254123ee3b41c3dcb655144edc1f239a42749803682d6292482a1957", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling anyhow v1.0.66
[INFO] [stderr]     Checking regex v1.7.1
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking rust-advent-of-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `env`
[INFO] [stdout]  --> src/common.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env, fs::read_to_string};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `env`
[INFO] [stdout]  --> src/common.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env, fs::read_to_string};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrettyNode` is never constructed
[INFO] [stdout]    --> src/six_to_ten.rs:267:8
[INFO] [stdout]     |
[INFO] [stdout] 267 | struct PrettyNode<'a>(&'a EntryRef);
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrettyNode` is never constructed
[INFO] [stdout]    --> src/six_to_ten.rs:267:8
[INFO] [stdout]     |
[INFO] [stdout] 267 | struct PrettyNode<'a>(&'a EntryRef);
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.67s
[INFO] running `Command { std: "docker" "inspect" "8e03469a254123ee3b41c3dcb655144edc1f239a42749803682d6292482a1957", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e03469a254123ee3b41c3dcb655144edc1f239a42749803682d6292482a1957", kill_on_drop: false }`
[INFO] [stdout] 8e03469a254123ee3b41c3dcb655144edc1f239a42749803682d6292482a1957
[INFO] checking rhapsodyn/rust-advent-of-code against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frhapsodyn%2Frust-advent-of-code" "/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/rhapsodyn/rust-advent-of-code 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/rhapsodyn/rust-advent-of-code
[INFO] finished tweaking git repo https://github.com/rhapsodyn/rust-advent-of-code
[INFO] tweaked toml for git repo https://github.com/rhapsodyn/rust-advent-of-code written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/rhapsodyn/rust-advent-of-code 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] 003203bea677e5d428469cabf42f6a13c7d58f45f09cdc6838786ea911d4ec27
[INFO] running `Command { std: "docker" "start" "-a" "003203bea677e5d428469cabf42f6a13c7d58f45f09cdc6838786ea911d4ec27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "003203bea677e5d428469cabf42f6a13c7d58f45f09cdc6838786ea911d4ec27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "003203bea677e5d428469cabf42f6a13c7d58f45f09cdc6838786ea911d4ec27", kill_on_drop: false }`
[INFO] [stdout] 003203bea677e5d428469cabf42f6a13c7d58f45f09cdc6838786ea911d4ec27
[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] b6aa9e0c758aa4599409e7dd984b7d350370d9f93395559698659f1ccb8bd0fb
[INFO] running `Command { std: "docker" "start" "-a" "b6aa9e0c758aa4599409e7dd984b7d350370d9f93395559698659f1ccb8bd0fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling anyhow v1.0.66
[INFO] [stderr]     Checking regex v1.7.1
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking rust-advent-of-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `env`
[INFO] [stdout]  --> src/common.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env, fs::read_to_string};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `env`
[INFO] [stdout]  --> src/common.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env, fs::read_to_string};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrettyNode` is never constructed
[INFO] [stdout]    --> src/six_to_ten.rs:267:8
[INFO] [stdout]     |
[INFO] [stdout] 267 | struct PrettyNode<'a>(&'a EntryRef);
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrettyNode` is never constructed
[INFO] [stdout]    --> src/six_to_ten.rs:267:8
[INFO] [stdout]     |
[INFO] [stdout] 267 | struct PrettyNode<'a>(&'a EntryRef);
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.10s
[INFO] running `Command { std: "docker" "inspect" "b6aa9e0c758aa4599409e7dd984b7d350370d9f93395559698659f1ccb8bd0fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6aa9e0c758aa4599409e7dd984b7d350370d9f93395559698659f1ccb8bd0fb", kill_on_drop: false }`
[INFO] [stdout] b6aa9e0c758aa4599409e7dd984b7d350370d9f93395559698659f1ccb8bd0fb