[INFO] updating cached repository https://github.com/notdanilo/lunachallenges
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b6046f75c2d6b7294f443fd44fcdff218459c3b8
[INFO] checking notdanilo/lunachallenges against try#c8bdaa84ec1b37f18f30375e196a65b7602f3790 for pr-73345
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnotdanilo%2Flunachallenges" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/notdanilo/lunachallenges on toolchain c8bdaa84ec1b37f18f30375e196a65b7602f3790
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/notdanilo/lunachallenges
[INFO] finished tweaking git repo https://github.com/notdanilo/lunachallenges
[INFO] tweaked toml for git repo https://github.com/notdanilo/lunachallenges written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/notdanilo/lunachallenges already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48fb47351c4aef89ebd580a32dfa95034029cae89db8420ec338ac94be6b852e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "48fb47351c4aef89ebd580a32dfa95034029cae89db8420ec338ac94be6b852e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48fb47351c4aef89ebd580a32dfa95034029cae89db8420ec338ac94be6b852e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48fb47351c4aef89ebd580a32dfa95034029cae89db8420ec338ac94be6b852e", kill_on_drop: false }`
[INFO] [stdout] 48fb47351c4aef89ebd580a32dfa95034029cae89db8420ec338ac94be6b852e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 61a759bb92b359da1ee629d3c78b134bb57171102be8c1ac481c5e62597a51a4
[INFO] running `Command { std: "docker" "start" "-a" "61a759bb92b359da1ee629d3c78b134bb57171102be8c1ac481c5e62597a51a4", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/weakset.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | /         (match lhs {
[INFO] [stdout] 38 | |             Some(left) => {
[INFO] [stdout] 39 | |                 match rhs {
[INFO] [stdout] 40 | |                     Some(right) => left == right,
[INFO] [stdout] ...  |
[INFO] [stdout] 49 | |             }
[INFO] [stdout] 50 | |         })
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 37 |         match lhs {
[INFO] [stdout] 38 |             Some(left) => {
[INFO] [stdout] 39 |                 match rhs {
[INFO] [stdout] 40 |                     Some(right) => left == right,
[INFO] [stdout] 41 |                     None => false
[INFO] [stdout] 42 |                 }
[INFO] [stdout]  ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/weakset.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | /         (match lhs {
[INFO] [stdout] 38 | |             Some(left) => {
[INFO] [stdout] 39 | |                 match rhs {
[INFO] [stdout] 40 | |                     Some(right) => left == right,
[INFO] [stdout] ...  |
[INFO] [stdout] 49 | |             }
[INFO] [stdout] 50 | |         })
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 37 |         match lhs {
[INFO] [stdout] 38 |             Some(left) => {
[INFO] [stdout] 39 |                 match rhs {
[INFO] [stdout] 40 |                     Some(right) => left == right,
[INFO] [stdout] 41 |                     None => false
[INFO] [stdout] 42 |                 }
[INFO] [stdout]  ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "61a759bb92b359da1ee629d3c78b134bb57171102be8c1ac481c5e62597a51a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61a759bb92b359da1ee629d3c78b134bb57171102be8c1ac481c5e62597a51a4", kill_on_drop: false }`
[INFO] [stdout] 61a759bb92b359da1ee629d3c78b134bb57171102be8c1ac481c5e62597a51a4