[INFO] cloning repository https://github.com/camccar/Rust-Binary-Tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/camccar/Rust-Binary-Tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcamccar%2FRust-Binary-Tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcamccar%2FRust-Binary-Tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 075cf6d6999864324671efa448c3e687996ad24c
[INFO] testing camccar/Rust-Binary-Tree against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcamccar%2FRust-Binary-Tree" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/camccar/Rust-Binary-Tree on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/camccar/Rust-Binary-Tree
[INFO] finished tweaking git repo https://github.com/camccar/Rust-Binary-Tree
[INFO] tweaked toml for git repo https://github.com/camccar/Rust-Binary-Tree written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/camccar/Rust-Binary-Tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 765846d68add3597975a7def5a7643d9563ee256581317d4ed98059b3606993a
[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" "765846d68add3597975a7def5a7643d9563ee256581317d4ed98059b3606993a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "765846d68add3597975a7def5a7643d9563ee256581317d4ed98059b3606993a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "765846d68add3597975a7def5a7643d9563ee256581317d4ed98059b3606993a", kill_on_drop: false }`
[INFO] [stdout] 765846d68add3597975a7def5a7643d9563ee256581317d4ed98059b3606993a
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d1ccf83c8ab557c4cc4209056e34db8c7c070505ef1d4cd6691e046401a27874
[INFO] running `Command { std: "docker" "start" "-a" "d1ccf83c8ab557c4cc4209056e34db8c7c070505ef1d4cd6691e046401a27874", kill_on_drop: false }`
[INFO] [stderr]    Compiling tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `Avl_Tree` should have an upper camel case name
[INFO] [stdout]  --> src/main.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Avl_Tree {
[INFO] [stdout]   |            ^^^^^^^^ help: convert the identifier to upper camel case: `AvlTree`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/main.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |                 panic!("tree not initialised. Try calling Avl_Tree::new(i32)");
[INFO] [stdout]    |                 --------------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout] 34 |                 return false;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/main.rs:348:9
[INFO] [stdout]     |
[INFO] [stdout] 348 |     let mut root = Node::new(100);
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `bool1` is never read
[INFO] [stdout]    --> src/main.rs:311:17
[INFO] [stdout]     |
[INFO] [stdout] 311 |             let mut bool1 = false;
[INFO] [stdout]     |                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `bool2` is never read
[INFO] [stdout]    --> src/main.rs:312:17
[INFO] [stdout]     |
[INFO] [stdout] 312 |             let mut bool2 = false;
[INFO] [stdout]     |                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:174:37
[INFO] [stdout]     |
[INFO] [stdout] 174 |         fn recurse_build (n_d:&Node,mut tree:&mut Vec<Vec<i32>>,depth:i32)  {
[INFO] [stdout]     |                                     ----^^^^
[INFO] [stdout]     |                                     |
[INFO] [stdout]     |                                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:348:9
[INFO] [stdout]     |
[INFO] [stdout] 348 |     let mut root = Node::new(100);
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `delete_right`
[INFO] [stdout]   --> src/main.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn delete_right(&mut self){
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_left_value`
[INFO] [stdout]    --> src/main.rs:211:8
[INFO] [stdout]     |
[INFO] [stdout] 211 |     fn get_left_value(&self)-> Option<i32> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_right_value`
[INFO] [stdout]    --> src/main.rs:226:8
[INFO] [stdout]     |
[INFO] [stdout] 226 |     fn get_right_value(&self)-> Option<i32> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `A_Tree` should have a snake case name
[INFO] [stdout]    --> src/main.rs:346:13
[INFO] [stdout]     |
[INFO] [stdout] 346 |     let mut A_Tree = Avl_Tree::new(100);
[INFO] [stdout]     |             ^^^^^^ help: convert the identifier to snake case: `a_tree`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `Command { std: "docker" "inspect" "d1ccf83c8ab557c4cc4209056e34db8c7c070505ef1d4cd6691e046401a27874", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1ccf83c8ab557c4cc4209056e34db8c7c070505ef1d4cd6691e046401a27874", kill_on_drop: false }`
[INFO] [stdout] d1ccf83c8ab557c4cc4209056e34db8c7c070505ef1d4cd6691e046401a27874
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b7213997d2325f5c478d5042d1233d2db1d77db26cfc3675cc3d6898e7e23522
[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" "b7213997d2325f5c478d5042d1233d2db1d77db26cfc3675cc3d6898e7e23522", kill_on_drop: false }`
[INFO] [stderr]    Compiling tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `Avl_Tree` should have an upper camel case name
[INFO] [stdout]  --> src/main.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Avl_Tree {
[INFO] [stdout]   |            ^^^^^^^^ help: convert the identifier to upper camel case: `AvlTree`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/main.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |                 panic!("tree not initialised. Try calling Avl_Tree::new(i32)");
[INFO] [stdout]    |                 --------------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout] 34 |                 return false;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/main.rs:348:9
[INFO] [stdout]     |
[INFO] [stdout] 348 |     let mut root = Node::new(100);
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `bool1` is never read
[INFO] [stdout]    --> src/main.rs:311:17
[INFO] [stdout]     |
[INFO] [stdout] 311 |             let mut bool1 = false;
[INFO] [stdout]     |                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `bool2` is never read
[INFO] [stdout]    --> src/main.rs:312:17
[INFO] [stdout]     |
[INFO] [stdout] 312 |             let mut bool2 = false;
[INFO] [stdout]     |                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:174:37
[INFO] [stdout]     |
[INFO] [stdout] 174 |         fn recurse_build (n_d:&Node,mut tree:&mut Vec<Vec<i32>>,depth:i32)  {
[INFO] [stdout]     |                                     ----^^^^
[INFO] [stdout]     |                                     |
[INFO] [stdout]     |                                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:348:9
[INFO] [stdout]     |
[INFO] [stdout] 348 |     let mut root = Node::new(100);
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `delete_right`
[INFO] [stdout]   --> src/main.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn delete_right(&mut self){
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_left_value`
[INFO] [stdout]    --> src/main.rs:211:8
[INFO] [stdout]     |
[INFO] [stdout] 211 |     fn get_left_value(&self)-> Option<i32> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_right_value`
[INFO] [stdout]    --> src/main.rs:226:8
[INFO] [stdout]     |
[INFO] [stdout] 226 |     fn get_right_value(&self)-> Option<i32> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `A_Tree` should have a snake case name
[INFO] [stdout]    --> src/main.rs:346:13
[INFO] [stdout]     |
[INFO] [stdout] 346 |     let mut A_Tree = Avl_Tree::new(100);
[INFO] [stdout]     |             ^^^^^^ help: convert the identifier to snake case: `a_tree`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.83s
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b7213997d2325f5c478d5042d1233d2db1d77db26cfc3675cc3d6898e7e23522", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7213997d2325f5c478d5042d1233d2db1d77db26cfc3675cc3d6898e7e23522", kill_on_drop: false }`
[INFO] [stdout] b7213997d2325f5c478d5042d1233d2db1d77db26cfc3675cc3d6898e7e23522
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6a85efb7f9273475ac05f7512ec3ab846d53ff3c904c55979a4b33e6a0563bdf
[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" "6a85efb7f9273475ac05f7512ec3ab846d53ff3c904c55979a4b33e6a0563bdf", kill_on_drop: false }`
[INFO] [stderr] warning: type `Avl_Tree` should have an upper camel case name
[INFO] [stderr]  --> src/main.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Avl_Tree {
[INFO] [stderr]   |            ^^^^^^^^ help: convert the identifier to upper camel case: `AvlTree`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/main.rs:34:17
[INFO] [stderr]    |
[INFO] [stderr] 33 |                 panic!("tree not initialised. Try calling Avl_Tree::new(i32)");
[INFO] [stderr]    |                 --------------------------------------------------------------- any code following this expression is unreachable
[INFO] [stderr] 34 |                 return false;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `root`
[INFO] [stderr]    --> src/main.rs:348:9
[INFO] [stderr]     |
[INFO] [stderr] 348 |     let mut root = Node::new(100);
[INFO] [stderr]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `bool1` is never read
[INFO] [stderr]    --> src/main.rs:311:17
[INFO] [stderr]     |
[INFO] [stderr] 311 |             let mut bool1 = false;
[INFO] [stderr]     |                 ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `bool2` is never read
[INFO] [stderr]    --> src/main.rs:312:17
[INFO] [stderr]     |
[INFO] [stderr] 312 |             let mut bool2 = false;
[INFO] [stderr]     |                 ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:174:37
[INFO] [stderr]     |
[INFO] [stderr] 174 |         fn recurse_build (n_d:&Node,mut tree:&mut Vec<Vec<i32>>,depth:i32)  {
[INFO] [stderr]     |                                     ----^^^^
[INFO] [stderr]     |                                     |
[INFO] [stderr]     |                                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:348:9
[INFO] [stderr]     |
[INFO] [stderr] 348 |     let mut root = Node::new(100);
[INFO] [stderr]     |         ----^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `delete_right`
[INFO] [stderr]   --> src/main.rs:64:8
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn delete_right(&mut self){
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_left_value`
[INFO] [stderr]    --> src/main.rs:211:8
[INFO] [stderr]     |
[INFO] [stderr] 211 |     fn get_left_value(&self)-> Option<i32> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_right_value`
[INFO] [stderr]    --> src/main.rs:226:8
[INFO] [stderr]     |
[INFO] [stderr] 226 |     fn get_right_value(&self)-> Option<i32> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `A_Tree` should have a snake case name
[INFO] [stderr]    --> src/main.rs:346:13
[INFO] [stderr]     |
[INFO] [stderr] 346 |     let mut A_Tree = Avl_Tree::new(100);
[INFO] [stderr]     |             ^^^^^^ help: convert the identifier to snake case: `a_tree`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 11 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/tree-f4fc4fb293999729
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6a85efb7f9273475ac05f7512ec3ab846d53ff3c904c55979a4b33e6a0563bdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a85efb7f9273475ac05f7512ec3ab846d53ff3c904c55979a4b33e6a0563bdf", kill_on_drop: false }`
[INFO] [stdout] 6a85efb7f9273475ac05f7512ec3ab846d53ff3c904c55979a4b33e6a0563bdf
