[INFO] cloning repository https://github.com/skermes/aoc20
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/skermes/aoc20" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskermes%2Faoc20", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskermes%2Faoc20'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3fffc5894f33c57fa22053ddd7ea98aedaf4ec46
[INFO] checking skermes/aoc20 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskermes%2Faoc20" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/skermes/aoc20 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/skermes/aoc20
[INFO] finished tweaking git repo https://github.com/skermes/aoc20
[INFO] tweaked toml for git repo https://github.com/skermes/aoc20 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/skermes/aoc20 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5c7d401aadb40d37bcd9a525e6c5c56881c04f864e15fa688d04e70bfc7c241
[INFO] running `Command { std: "docker" "start" "-a" "f5c7d401aadb40d37bcd9a525e6c5c56881c04f864e15fa688d04e70bfc7c241", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5c7d401aadb40d37bcd9a525e6c5c56881c04f864e15fa688d04e70bfc7c241", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5c7d401aadb40d37bcd9a525e6c5c56881c04f864e15fa688d04e70bfc7c241", kill_on_drop: false }`
[INFO] [stdout] f5c7d401aadb40d37bcd9a525e6c5c56881c04f864e15fa688d04e70bfc7c241
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df7cd0a5ff5c76e5e05cd2b4f5772efc754c05b17b041db29c7ccd35ed4c4f6e
[INFO] running `Command { std: "docker" "start" "-a" "df7cd0a5ff5c76e5e05cd2b4f5772efc754c05b17b041db29c7ccd35ed4c4f6e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking libmath v0.1.4
[INFO] [stderr]     Checking prime_tools v0.3.4
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking aoc20 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `str_split_once` has been stable since 1.52.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(str_split_once)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `str_split_once` has been stable since 1.52.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(str_split_once)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.93s
[INFO] running `Command { std: "docker" "inspect" "df7cd0a5ff5c76e5e05cd2b4f5772efc754c05b17b041db29c7ccd35ed4c4f6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df7cd0a5ff5c76e5e05cd2b4f5772efc754c05b17b041db29c7ccd35ed4c4f6e", kill_on_drop: false }`
[INFO] [stdout] df7cd0a5ff5c76e5e05cd2b4f5772efc754c05b17b041db29c7ccd35ed4c4f6e