[INFO] updating cached repository https://github.com/hunterlester/rusty_algo_structs
[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] [stderr] From https://github.com/hunterlester/rusty_algo_structs
[INFO] [stderr]    9c17972..21268eb  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 21268eb27f5e0247c9ecefb2c95a23403d316a0f
[INFO] checking hunterlester/rusty_algo_structs against try#98d5ea1855f1028095b37c493ba31093c8519d68 for pr-69548
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhunterlester%2Frusty_algo_structs" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hunterlester/rusty_algo_structs on toolchain 98d5ea1855f1028095b37c493ba31093c8519d68
[INFO] running `"/workspace/cargo-home/bin/cargo" "+98d5ea1855f1028095b37c493ba31093c8519d68" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/hunterlester/rusty_algo_structs
[INFO] finished tweaking git repo https://github.com/hunterlester/rusty_algo_structs
[INFO] tweaked toml for git repo https://github.com/hunterlester/rusty_algo_structs written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/hunterlester/rusty_algo_structs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+98d5ea1855f1028095b37c493ba31093c8519d68" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+98d5ea1855f1028095b37c493ba31093c8519d68" "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] 2c6b5d952f12b7f58857f6442b0b69c1203f09764bfdddb72b371c14d419958d
[INFO] running `"docker" "start" "-a" "2c6b5d952f12b7f58857f6442b0b69c1203f09764bfdddb72b371c14d419958d"`
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking bstr v0.2.11
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking criterion-plot v0.4.1
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking criterion v0.3.1
[INFO] [stderr]     Checking rusty_algo_structs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/data_structures/binary_tree.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn new(value: i32) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_left`
[INFO] [stderr]   --> src/data_structures/binary_tree.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn insert_left(&mut self, value: Option<i32>) -> () {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_right`
[INFO] [stderr]   --> src/data_structures/binary_tree.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn insert_right(&mut self, value: Option<i32>) -> () {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]   --> src/data_structures/binary_tree.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn insert(&mut self, value: Option<i32>) -> () {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `inorder_traverse_left`
[INFO] [stderr]   --> src/data_structures/binary_tree.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     fn inorder_traverse_left(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `inorder_traverse_right`
[INFO] [stderr]   --> src/data_structures/binary_tree.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn inorder_traverse_right(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `inorder_traverse`
[INFO] [stderr]   --> src/data_structures/binary_tree.rs:88:5
[INFO] [stderr]    |
[INFO] [stderr] 88 |     pub fn inorder_traverse(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `preorder_traverse_left`
[INFO] [stderr]   --> src/data_structures/binary_tree.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     fn preorder_traverse_left(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `preorder_traverse_right`
[INFO] [stderr]    --> src/data_structures/binary_tree.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 |     fn preorder_traverse_right(&self) -> Vec<i32> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `preorder_traverse`
[INFO] [stderr]    --> src/data_structures/binary_tree.rs:108:5
[INFO] [stderr]     |
[INFO] [stderr] 108 |     pub fn preorder_traverse(&self) -> Vec<i32> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `postorder_traverse_left`
[INFO] [stderr]    --> src/data_structures/binary_tree.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     fn postorder_traverse_left(&self) -> Vec<i32> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `postorder_traverse_right`
[INFO] [stderr]    --> src/data_structures/binary_tree.rs:120:5
[INFO] [stderr]     |
[INFO] [stderr] 120 |     fn postorder_traverse_right(&self) -> Vec<i32> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `postorder_traverse`
[INFO] [stderr]    --> src/data_structures/binary_tree.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 |     pub fn postorder_traverse(&self) -> Vec<i32> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/data_structures/binary_search_tree.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn new(value: i32) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_left`
[INFO] [stderr]   --> src/data_structures/binary_search_tree.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn insert_left(&mut self, value: i32) -> () {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_right`
[INFO] [stderr]   --> src/data_structures/binary_search_tree.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn insert_right(&mut self, value: i32) -> () {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]   --> src/data_structures/binary_search_tree.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn insert(&mut self, value: i32) -> () {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `inorder_traverse_left`
[INFO] [stderr]   --> src/data_structures/binary_search_tree.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn inorder_traverse_left(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `inorder_traverse_right`
[INFO] [stderr]   --> src/data_structures/binary_search_tree.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     fn inorder_traverse_right(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `inorder_traverse`
[INFO] [stderr]   --> src/data_structures/binary_search_tree.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn inorder_traverse(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `preorder_traverse_left`
[INFO] [stderr]   --> src/data_structures/binary_search_tree.rs:78:5
[INFO] [stderr]    |
[INFO] [stderr] 78 |     fn preorder_traverse_left(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `preorder_traverse_right`
[INFO] [stderr]   --> src/data_structures/binary_search_tree.rs:86:5
[INFO] [stderr]    |
[INFO] [stderr] 86 |     fn preorder_traverse_right(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `preorder_traverse`
[INFO] [stderr]   --> src/data_structures/binary_search_tree.rs:94:5
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn preorder_traverse(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `postorder_traverse_left`
[INFO] [stderr]   --> src/data_structures/binary_search_tree.rs:98:5
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn postorder_traverse_left(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `postorder_traverse_right`
[INFO] [stderr]    --> src/data_structures/binary_search_tree.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     fn postorder_traverse_right(&self) -> Vec<i32> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `postorder_traverse`
[INFO] [stderr]    --> src/data_structures/binary_search_tree.rs:114:5
[INFO] [stderr]     |
[INFO] [stderr] 114 |     pub fn postorder_traverse(&self) -> Vec<i32> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `inorder_iterate`
[INFO] [stderr]    --> src/data_structures/binary_search_tree.rs:118:5
[INFO] [stderr]     |
[INFO] [stderr] 118 |     pub fn inorder_iterate(&self) -> Vec<i32> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 51.76s
[INFO] running `"docker" "inspect" "2c6b5d952f12b7f58857f6442b0b69c1203f09764bfdddb72b371c14d419958d"`
[INFO] running `"docker" "rm" "-f" "2c6b5d952f12b7f58857f6442b0b69c1203f09764bfdddb72b371c14d419958d"`
[INFO] [stdout] 2c6b5d952f12b7f58857f6442b0b69c1203f09764bfdddb72b371c14d419958d