[INFO] cloning repository https://github.com/cipriancraciun/journald-exporter
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cipriancraciun/journald-exporter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcipriancraciun%2Fjournald-exporter"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcipriancraciun%2Fjournald-exporter'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 99a98730ccf2ad9228e06f982255ff335d80b852
[INFO] checking cipriancraciun/journald-exporter against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcipriancraciun%2Fjournald-exporter" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cipriancraciun/journald-exporter on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/cipriancraciun/journald-exporter
[INFO] finished tweaking git repo https://github.com/cipriancraciun/journald-exporter
[INFO] tweaked toml for git repo https://github.com/cipriancraciun/journald-exporter written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/cipriancraciun/journald-exporter already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3f3e16b0d6b6afcfa0c5b1c1e288185bb8f4b60c766fbc626fea02f3acfce8f1
[INFO] running `"docker" "start" "-a" "3f3e16b0d6b6afcfa0c5b1c1e288185bb8f4b60c766fbc626fea02f3acfce8f1"`
[INFO] [stderr]    Compiling libsystemd-sys v0.2.2
[INFO] [stderr]     Checking journald-exporter v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib.rs:44:19
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn main () -> (Result<(), io::Error>) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib.rs:113:95
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn sd_read_field (_journal : *mut sd::sd_journal, _key : &FieldKey, _buffer : &mut String) -> (Result<bool, io::Error>) {
[INFO] [stderr]     |                                                                                               ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib.rs:158:43
[INFO] [stderr]     |
[INFO] [stderr] 158 | fn sd_outcome (_outcome : libc::c_int) -> (Result<u32, io::Error>) {
[INFO] [stderr]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib.rs:44:19
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn main () -> (Result<(), io::Error>) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib.rs:113:95
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn sd_read_field (_journal : *mut sd::sd_journal, _key : &FieldKey, _buffer : &mut String) -> (Result<bool, io::Error>) {
[INFO] [stderr]     |                                                                                               ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib.rs:158:43
[INFO] [stderr]     |
[INFO] [stderr] 158 | fn sd_outcome (_outcome : libc::c_int) -> (Result<u32, io::Error>) {
[INFO] [stderr]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.16s
[INFO] running `"docker" "inspect" "3f3e16b0d6b6afcfa0c5b1c1e288185bb8f4b60c766fbc626fea02f3acfce8f1"`
[INFO] running `"docker" "rm" "-f" "3f3e16b0d6b6afcfa0c5b1c1e288185bb8f4b60c766fbc626fea02f3acfce8f1"`
[INFO] [stdout] 3f3e16b0d6b6afcfa0c5b1c1e288185bb8f4b60c766fbc626fea02f3acfce8f1