[INFO] cloning repository https://github.com/tada3/binary-tree-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tada3/binary-tree-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftada3%2Fbinary-tree-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftada3%2Fbinary-tree-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a10a550dee688662d35104da8ff6d7f3c55a9d31
[INFO] checking tada3/binary-tree-rust against master#0dce3f606e05cffab7361c132a399d3550ab0df8 for pr-78376
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftada3%2Fbinary-tree-rust" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tada3/binary-tree-rust on toolchain 0dce3f606e05cffab7361c132a399d3550ab0df8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tada3/binary-tree-rust
[INFO] finished tweaking git repo https://github.com/tada3/binary-tree-rust
[INFO] tweaked toml for git repo https://github.com/tada3/binary-tree-rust written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/tada3/binary-tree-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6e2b2e5ce5f3843f6dcdbd1fb0ec6edcf54594a8ee1d0585ae8c4b8c7c134bd
[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" "f6e2b2e5ce5f3843f6dcdbd1fb0ec6edcf54594a8ee1d0585ae8c4b8c7c134bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6e2b2e5ce5f3843f6dcdbd1fb0ec6edcf54594a8ee1d0585ae8c4b8c7c134bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6e2b2e5ce5f3843f6dcdbd1fb0ec6edcf54594a8ee1d0585ae8c4b8c7c134bd", kill_on_drop: false }`
[INFO] [stdout] f6e2b2e5ce5f3843f6dcdbd1fb0ec6edcf54594a8ee1d0585ae8c4b8c7c134bd
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e6817f8f40526d3cfc0f2ae2636a2d2b8d0a91275f9fee996982f5d719e5fc5
[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" "3e6817f8f40526d3cfc0f2ae2636a2d2b8d0a91275f9fee996982f5d719e5fc5", kill_on_drop: false }`
[INFO] [stderr]     Checking btree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `newNode` should have a snake case name
[INFO] [stdout]   --> src/main.rs:97:21
[INFO] [stdout]    |
[INFO] [stdout] 97 |                 let newNode = Node::new(x);
[INFO] [stdout]    |                     ^^^^^^^ help: convert the identifier to snake case: `new_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `boxedNode` should have a snake case name
[INFO] [stdout]   --> src/main.rs:98:21
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 let boxedNode = Some(Box::new(newNode));
[INFO] [stdout]    |                     ^^^^^^^^^ help: convert the identifier to snake case: `boxed_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `newNode` should have a snake case name
[INFO] [stdout]   --> src/main.rs:97:21
[INFO] [stdout]    |
[INFO] [stdout] 97 |                 let newNode = Node::new(x);
[INFO] [stdout]    |                     ^^^^^^^ help: convert the identifier to snake case: `new_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `boxedNode` should have a snake case name
[INFO] [stdout]   --> src/main.rs:98:21
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 let boxedNode = Some(Box::new(newNode));
[INFO] [stdout]    |                     ^^^^^^^^^ help: convert the identifier to snake case: `boxed_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "3e6817f8f40526d3cfc0f2ae2636a2d2b8d0a91275f9fee996982f5d719e5fc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e6817f8f40526d3cfc0f2ae2636a2d2b8d0a91275f9fee996982f5d719e5fc5", kill_on_drop: false }`
[INFO] [stdout] 3e6817f8f40526d3cfc0f2ae2636a2d2b8d0a91275f9fee996982f5d719e5fc5