[INFO] updating cached repository https://github.com/willmurphyscode/simple-rust-tree
[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] 9fed11bd29057459ead0b54458541ad1302e25c7
[INFO] checking willmurphyscode/simple-rust-tree against master#914adf04af1c1a984707f778da3d04590c03d144 for pr-72331
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillmurphyscode%2Fsimple-rust-tree" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/willmurphyscode/simple-rust-tree on toolchain 914adf04af1c1a984707f778da3d04590c03d144
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/willmurphyscode/simple-rust-tree
[INFO] finished tweaking git repo https://github.com/willmurphyscode/simple-rust-tree
[INFO] tweaked toml for git repo https://github.com/willmurphyscode/simple-rust-tree written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/willmurphyscode/simple-rust-tree already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+914adf04af1c1a984707f778da3d04590c03d144" "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] 37dac7f554632ee803bcf5e65cf698dea3bf1480f2a16ff2f10be0f3d858449f
[INFO] running `"docker" "start" "-a" "37dac7f554632ee803bcf5e65cf698dea3bf1480f2a16ff2f10be0f3d858449f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking libc v0.2.24
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking tree_walker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/main.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 | /             (our_fruit + recursive_count_fruit(unboxed.left_child) +
[INFO] [stderr] 13 | |                  recursive_count_fruit(unboxed.right_child))
[INFO] [stderr]    | |____________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 12 |             our_fruit + recursive_count_fruit(unboxed.left_child) +
[INFO] [stderr] 13 |                  recursive_count_fruit(unboxed.right_child)
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/main.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 | /             (our_fruit + recursive_count_fruit(unboxed.left_child) +
[INFO] [stderr] 13 | |                  recursive_count_fruit(unboxed.right_child))
[INFO] [stderr]    | |____________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 12 |             our_fruit + recursive_count_fruit(unboxed.left_child) +
[INFO] [stderr] 13 |                  recursive_count_fruit(unboxed.right_child)
[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 2.07s
[INFO] running `"docker" "inspect" "37dac7f554632ee803bcf5e65cf698dea3bf1480f2a16ff2f10be0f3d858449f"`
[INFO] running `"docker" "rm" "-f" "37dac7f554632ee803bcf5e65cf698dea3bf1480f2a16ff2f10be0f3d858449f"`
[INFO] [stdout] 37dac7f554632ee803bcf5e65cf698dea3bf1480f2a16ff2f10be0f3d858449f