[INFO] updating cached repository https://github.com/JesterOrNot/BinarySearchTree
[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] 0de8860dd9996a908be58517e47c30f234fbb30b
[INFO] checking JesterOrNot/BinarySearchTree against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJesterOrNot%2FBinarySearchTree" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JesterOrNot/BinarySearchTree on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/JesterOrNot/BinarySearchTree
[INFO] finished tweaking git repo https://github.com/JesterOrNot/BinarySearchTree
[INFO] tweaked toml for git repo https://github.com/JesterOrNot/BinarySearchTree written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/JesterOrNot/BinarySearchTree already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3bd4520306f68fdd021c3bed480fd1e378ccb93f7b8b1910b171e52c5051db9a
[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" "3bd4520306f68fdd021c3bed480fd1e378ccb93f7b8b1910b171e52c5051db9a"`
[INFO] [stderr]     Checking BinarySearchTree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: type `tree_node` should have an upper camel case name
[INFO] [stderr]  --> BST.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct tree_node {
[INFO] [stderr]   |        ^^^^^^^^^ help: convert the identifier to upper camel case: `TreeNode`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `binary_tree` should have an upper camel case name
[INFO] [stderr]  --> BST.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct binary_tree {
[INFO] [stderr]   |        ^^^^^^^^^^^ help: convert the identifier to upper camel case: `BinaryTree`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tree`
[INFO] [stderr]   --> BST.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let tree: binary_tree;
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_tree`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `left`
[INFO] [stderr]  --> BST.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     left: Box<tree_node>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `right`
[INFO] [stderr]  --> BST.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     right: Box<tree_node>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `value`
[INFO] [stderr]  --> BST.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     value: i32,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `root`
[INFO] [stderr]  --> BST.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     root: tree_node
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `BinarySearchTree` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `binary_search_tree`
[INFO] [stderr] 
[INFO] [stderr] warning: type `tree_node` should have an upper camel case name
[INFO] [stderr]  --> BST.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct tree_node {
[INFO] [stderr]   |        ^^^^^^^^^ help: convert the identifier to upper camel case: `TreeNode`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `binary_tree` should have an upper camel case name
[INFO] [stderr]  --> BST.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct binary_tree {
[INFO] [stderr]   |        ^^^^^^^^^^^ help: convert the identifier to upper camel case: `BinaryTree`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tree`
[INFO] [stderr]   --> BST.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let tree: binary_tree;
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_tree`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `left`
[INFO] [stderr]  --> BST.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     left: Box<tree_node>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `right`
[INFO] [stderr]  --> BST.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     right: Box<tree_node>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `value`
[INFO] [stderr]  --> BST.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     value: i32,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `root`
[INFO] [stderr]  --> BST.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     root: tree_node
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `BinarySearchTree` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `binary_search_tree`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "3bd4520306f68fdd021c3bed480fd1e378ccb93f7b8b1910b171e52c5051db9a"`
[INFO] running `"docker" "rm" "-f" "3bd4520306f68fdd021c3bed480fd1e378ccb93f7b8b1910b171e52c5051db9a"`
[INFO] [stdout] 3bd4520306f68fdd021c3bed480fd1e378ccb93f7b8b1910b171e52c5051db9a