[INFO] updating cached repository https://github.com/nuclearpesto/rust-binary-tree
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/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] e03f93f02462e0ed812e0d43f525598f29b072aa
[INFO] checking nuclearpesto/rust-binary-tree against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnuclearpesto%2Frust-binary-tree" "work/builds/worker-1/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nuclearpesto/rust-binary-tree on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/nuclearpesto/rust-binary-tree
[INFO] finished tweaking git repo https://github.com/nuclearpesto/rust-binary-tree
[INFO] tweaked toml for git repo https://github.com/nuclearpesto/rust-binary-tree written to work/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/nuclearpesto/rust-binary-tree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b91375e2826f3528c6a800d49d600d6b67c6f511906e853283f50a0d17c39f40
[INFO] running `"docker" "start" "-a" "b91375e2826f3528c6a800d49d600d6b67c6f511906e853283f50a0d17c39f40"`
[INFO] [stderr]     Checking binarytree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning[E0170]: pattern binding `Less` is named the same as one of the variants of the type `std::cmp::Ordering`
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: to match on the variant, qualify the path: `std::cmp::Ordering::Less`
[INFO] [stderr] 
[INFO] [stderr] warning[E0170]: pattern binding `Equal` is named the same as one of the variants of the type `std::cmp::Ordering`
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: to match on the variant, qualify the path: `std::cmp::Ordering::Equal`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ---- matches any value
[INFO] [stderr] ...
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ unreachable pattern
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ---- matches any value
[INFO] [stderr] ...
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ unreachable pattern
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `Less`
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_Less`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `More`
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_More`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `Equal`
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_Equal`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |         pub fn insert(tree: &BTree, key: &str) -> BTree {
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         pub fn new(key: &str) -> BTree {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]   --> src/main.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |         pub fn insert(tree: &Option<Rc<Node>>, key: &str) -> (Option<Rc<Node>>) {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `clone_node`
[INFO] [stderr]   --> src/main.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         fn clone_node(node: &Option<Rc<Node>>) -> (Option<Rc<Node>>) {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_leaf`
[INFO] [stderr]   --> src/main.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |         fn new_leaf(key: &str) -> (Option<Rc<Node>>) {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tree_by_key`
[INFO] [stderr]   --> src/main.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |         fn tree_by_key(tree: &Rc<Node>, key: &str) -> (Option<Rc<Node>>) {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Less` should have a snake case name
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: convert the identifier to snake case: `less`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `More` should have a snake case name
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ help: convert the identifier to snake case: `more`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Equal` should have a snake case name
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: convert the identifier to snake case: `equal`
[INFO] [stderr] 
[INFO] [stderr] warning[E0170]: pattern binding `Less` is named the same as one of the variants of the type `std::cmp::Ordering`
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: to match on the variant, qualify the path: `std::cmp::Ordering::Less`
[INFO] [stderr] 
[INFO] [stderr] warning[E0170]: pattern binding `Equal` is named the same as one of the variants of the type `std::cmp::Ordering`
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: to match on the variant, qualify the path: `std::cmp::Ordering::Equal`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ---- matches any value
[INFO] [stderr] ...
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ unreachable pattern
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ---- matches any value
[INFO] [stderr] ...
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ unreachable pattern
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `Less`
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_Less`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `More`
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_More`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `Equal`
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_Equal`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Less` should have a snake case name
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: convert the identifier to snake case: `less`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `More` should have a snake case name
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ help: convert the identifier to snake case: `more`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Equal` should have a snake case name
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: convert the identifier to snake case: `equal`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `"docker" "inspect" "b91375e2826f3528c6a800d49d600d6b67c6f511906e853283f50a0d17c39f40"`
[INFO] running `"docker" "rm" "-f" "b91375e2826f3528c6a800d49d600d6b67c6f511906e853283f50a0d17c39f40"`
[INFO] [stdout] b91375e2826f3528c6a800d49d600d6b67c6f511906e853283f50a0d17c39f40