[INFO] updating cached repository https://github.com/Venats/advent_of_code_2018
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 619b0dc892cb95f853fb042d824b9e60852081a0
[INFO] checking Venats/advent_of_code_2018 against master#bd0bacc694d7d8175804bb6f690cb846bfa4a9ee for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVenats%2Fadvent_of_code_2018" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Venats/advent_of_code_2018 on toolchain bd0bacc694d7d8175804bb6f690cb846bfa4a9ee
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Venats/advent_of_code_2018
[INFO] finished tweaking git repo https://github.com/Venats/advent_of_code_2018
[INFO] tweaked toml for git repo https://github.com/Venats/advent_of_code_2018 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Venats/advent_of_code_2018 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] be77a731c360b0ce45c5fdf4c9ea2073cf0ccf82cbecfae79b9f03298208b77c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "be77a731c360b0ce45c5fdf4c9ea2073cf0ccf82cbecfae79b9f03298208b77c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking backtrace-sys v0.1.24
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.22
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking scan_fmt v0.1.3
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking advent_of_code_2018 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `BufReader`, `stdin`
[INFO] [stderr]  --> src/lib.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{stdin,BufRead,BufReader};
[INFO] [stderr]   |               ^^^^^         ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufReader`, `stdin`
[INFO] [stderr]  --> src/lib.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{stdin,BufRead,BufReader};
[INFO] [stderr]   |               ^^^^^         ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/day7.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |         for mut task in self.edges.iter_mut() {
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/bin/day7.rs:108:25
[INFO] [stderr]     |
[INFO] [stderr] 108 |             if let Some(mut worker) = workers.iter_mut().find(|worker| worker.is_free()){
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/day7.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |         for mut task in self.edges.iter_mut() {
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/bin/day7.rs:108:25
[INFO] [stderr]     |
[INFO] [stderr] 108 |             if let Some(mut worker) = workers.iter_mut().find(|worker| worker.is_free()){
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.96s
[INFO] running `"docker" "inspect" "be77a731c360b0ce45c5fdf4c9ea2073cf0ccf82cbecfae79b9f03298208b77c"`
[INFO] running `"docker" "rm" "-f" "be77a731c360b0ce45c5fdf4c9ea2073cf0ccf82cbecfae79b9f03298208b77c"`
[INFO] [stdout] be77a731c360b0ce45c5fdf4c9ea2073cf0ccf82cbecfae79b9f03298208b77c