[INFO] cloning repository https://github.com/notdanilo/lunachallenges
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/notdanilo/lunachallenges" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnotdanilo%2Flunachallenges"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnotdanilo%2Flunachallenges'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b6046f75c2d6b7294f443fd44fcdff218459c3b8
[INFO] checking notdanilo/lunachallenges against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnotdanilo%2Flunachallenges" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/notdanilo/lunachallenges on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-9/source/Cargo.toml
[INFO] crate git repo https://github.com/notdanilo/lunachallenges already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 93b2cfcc760f04388700e2b56eac5b873ed8fb27bf97a2e66db1721e325785af
[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" "93b2cfcc760f04388700e2b56eac5b873ed8fb27bf97a2e66db1721e325785af"`
[INFO] [stderr]     Checking challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/weakset.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 | /         (match lhs {
[INFO] [stderr] 38 | |             Some(left) => {
[INFO] [stderr] 39 | |                 match rhs {
[INFO] [stderr] 40 | |                     Some(right) => left == right,
[INFO] [stderr] ...  |
[INFO] [stderr] 49 | |             }
[INFO] [stderr] 50 | |         })
[INFO] [stderr]    | |__________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 37 |         match lhs {
[INFO] [stderr] 38 |             Some(left) => {
[INFO] [stderr] 39 |                 match rhs {
[INFO] [stderr] 40 |                     Some(right) => left == right,
[INFO] [stderr] 41 |                     None => false
[INFO] [stderr] 42 |                 }
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/weakset.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 | /         (match lhs {
[INFO] [stderr] 38 | |             Some(left) => {
[INFO] [stderr] 39 | |                 match rhs {
[INFO] [stderr] 40 | |                     Some(right) => left == right,
[INFO] [stderr] ...  |
[INFO] [stderr] 49 | |             }
[INFO] [stderr] 50 | |         })
[INFO] [stderr]    | |__________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 37 |         match lhs {
[INFO] [stderr] 38 |             Some(left) => {
[INFO] [stderr] 39 |                 match rhs {
[INFO] [stderr] 40 |                     Some(right) => left == right,
[INFO] [stderr] 41 |                     None => false
[INFO] [stderr] 42 |                 }
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `"docker" "inspect" "93b2cfcc760f04388700e2b56eac5b873ed8fb27bf97a2e66db1721e325785af"`
[INFO] running `"docker" "rm" "-f" "93b2cfcc760f04388700e2b56eac5b873ed8fb27bf97a2e66db1721e325785af"`
[INFO] [stdout] 93b2cfcc760f04388700e2b56eac5b873ed8fb27bf97a2e66db1721e325785af