[INFO] cloning repository https://github.com/willmurphyscode/simple-rust-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/willmurphyscode/simple-rust-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillmurphyscode%2Fsimple-rust-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillmurphyscode%2Fsimple-rust-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9fed11bd29057459ead0b54458541ad1302e25c7
[INFO] checking willmurphyscode/simple-rust-tree against try#42d1facfffa1a5357d6d62815f7be91f8ad69ed8 for pr-95474
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillmurphyscode%2Fsimple-rust-tree" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/willmurphyscode/simple-rust-tree on toolchain 42d1facfffa1a5357d6d62815f7be91f8ad69ed8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+42d1facfffa1a5357d6d62815f7be91f8ad69ed8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-6/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 `Command { std: "/workspace/cargo-home/bin/cargo" "+42d1facfffa1a5357d6d62815f7be91f8ad69ed8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+42d1facfffa1a5357d6d62815f7be91f8ad69ed8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7217aac9e4943b5f4a47f32f0f259eede852b5620ca7a3cc71e3cd459510634
[INFO] running `Command { std: "docker" "start" "-a" "a7217aac9e4943b5f4a47f32f0f259eede852b5620ca7a3cc71e3cd459510634", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7217aac9e4943b5f4a47f32f0f259eede852b5620ca7a3cc71e3cd459510634", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7217aac9e4943b5f4a47f32f0f259eede852b5620ca7a3cc71e3cd459510634", kill_on_drop: false }`
[INFO] [stdout] a7217aac9e4943b5f4a47f32f0f259eede852b5620ca7a3cc71e3cd459510634
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+42d1facfffa1a5357d6d62815f7be91f8ad69ed8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7756d4577eb6491d1d143105789ba27cc9056f706f118243091b01d83c66430f
[INFO] running `Command { std: "docker" "start" "-a" "7756d4577eb6491d1d143105789ba27cc9056f706f118243091b01d83c66430f", kill_on_drop: false }`
[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] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/main.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |             (our_fruit + recursive_count_fruit(unboxed.left_child) +
[INFO] [stdout]    |             ^
[INFO] [stdout] 13 |                  recursive_count_fruit(unboxed.right_child))
[INFO] [stdout]    |                                                            ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 12 ~             our_fruit + recursive_count_fruit(unboxed.left_child) +
[INFO] [stdout] 13 ~                  recursive_count_fruit(unboxed.right_child)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/main.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |             (our_fruit + recursive_count_fruit(unboxed.left_child) +
[INFO] [stdout]    |             ^
[INFO] [stdout] 13 |                  recursive_count_fruit(unboxed.right_child))
[INFO] [stdout]    |                                                            ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 12 ~             our_fruit + recursive_count_fruit(unboxed.left_child) +
[INFO] [stdout] 13 ~                  recursive_count_fruit(unboxed.right_child)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `Command { std: "docker" "inspect" "7756d4577eb6491d1d143105789ba27cc9056f706f118243091b01d83c66430f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7756d4577eb6491d1d143105789ba27cc9056f706f118243091b01d83c66430f", kill_on_drop: false }`
[INFO] [stdout] 7756d4577eb6491d1d143105789ba27cc9056f706f118243091b01d83c66430f