[INFO] updating cached repository https://github.com/tonykuttai/Rust-Graph-Algorithms
[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] c65c565c2c3ac4e7d5a9382f36e68c08a8f6d135
[INFO] testing tonykuttai/Rust-Graph-Algorithms against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftonykuttai%2FRust-Graph-Algorithms" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tonykuttai/Rust-Graph-Algorithms on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/tonykuttai/Rust-Graph-Algorithms
[INFO] finished tweaking git repo https://github.com/tonykuttai/Rust-Graph-Algorithms
[INFO] tweaked toml for git repo https://github.com/tonykuttai/Rust-Graph-Algorithms written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/tonykuttai/Rust-Graph-Algorithms already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-9/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stdout] 35b824172e27b51bd968625903614604933220e89fe4eefeb3cd400dac1e6d43
[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" "35b824172e27b51bd968625903614604933220e89fe4eefeb3cd400dac1e6d43"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/istree.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/istree.rs:82:40
[INFO] [stderr]    |
[INFO] [stderr] 82 |                     let mut adj_list = (adj_list.lock().unwrap());
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:15:11
[INFO] [stderr]    |
[INFO] [stderr] 15 |       let mut row: usize = nodes;
[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/istree.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn tree(mut adj_list: &mut Vec< Vec<usize>>,mut visited: &mut Vec<bool>,index:usize,flag:bool,nodes: usize)->bool{
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:38:45
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn tree(mut adj_list: &mut Vec< Vec<usize>>,mut visited: &mut Vec<bool>,index:usize,flag:bool,nodes: usize)->bool{
[INFO] [stderr]    |                                             ----^^^^^^^
[INFO] [stderr]    |                                             |
[INFO] [stderr]    |                                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:61:19
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn check_tree(mut adj_list_c: &mut Vec< Vec<usize>>,nodes: usize){
[INFO] [stderr]    |                   ----^^^^^^^^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |     let mut adj_list= Arc::new(Mutex::new(adj_list));
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/istree.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         unsafe {
[INFO] [stderr]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `row_del` should have an upper case name
[INFO] [stderr]  --> src/istree.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | static mut row_del: usize = 0;
[INFO] [stderr]   |            ^^^^^^^ help: convert the identifier to upper case: `ROW_DEL`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:27:56
[INFO] [stderr]    |
[INFO] [stderr] 27 | ...                   Error::description(&why)),
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:34:56
[INFO] [stderr]    |
[INFO] [stderr] 34 | ...                   Error::description(&why)),
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `"docker" "inspect" "35b824172e27b51bd968625903614604933220e89fe4eefeb3cd400dac1e6d43"`
[INFO] running `"docker" "rm" "-f" "35b824172e27b51bd968625903614604933220e89fe4eefeb3cd400dac1e6d43"`
[INFO] [stdout] 35b824172e27b51bd968625903614604933220e89fe4eefeb3cd400dac1e6d43
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c63c4a0f4e7895db74d5b527312cb6667908d848553832f380bee82a0c417cf9
[INFO] running `"docker" "start" "-a" "c63c4a0f4e7895db74d5b527312cb6667908d848553832f380bee82a0c417cf9"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/istree.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/istree.rs:82:40
[INFO] [stderr]    |
[INFO] [stderr] 82 |                     let mut adj_list = (adj_list.lock().unwrap());
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:15:11
[INFO] [stderr]    |
[INFO] [stderr] 15 |       let mut row: usize = nodes;
[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/istree.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn tree(mut adj_list: &mut Vec< Vec<usize>>,mut visited: &mut Vec<bool>,index:usize,flag:bool,nodes: usize)->bool{
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:38:45
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn tree(mut adj_list: &mut Vec< Vec<usize>>,mut visited: &mut Vec<bool>,index:usize,flag:bool,nodes: usize)->bool{
[INFO] [stderr]    |                                             ----^^^^^^^
[INFO] [stderr]    |                                             |
[INFO] [stderr]    |                                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:61:19
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn check_tree(mut adj_list_c: &mut Vec< Vec<usize>>,nodes: usize){
[INFO] [stderr]    |                   ----^^^^^^^^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |     let mut adj_list= Arc::new(Mutex::new(adj_list));
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/istree.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         unsafe {
[INFO] [stderr]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `row_del` should have an upper case name
[INFO] [stderr]  --> src/istree.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | static mut row_del: usize = 0;
[INFO] [stderr]   |            ^^^^^^^ help: convert the identifier to upper case: `ROW_DEL`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/istree.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/istree.rs:82:40
[INFO] [stderr]    |
[INFO] [stderr] 82 |                     let mut adj_list = (adj_list.lock().unwrap());
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:27:56
[INFO] [stderr]    |
[INFO] [stderr] 27 | ...                   Error::description(&why)),
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:34:56
[INFO] [stderr]    |
[INFO] [stderr] 34 | ...                   Error::description(&why)),
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:15:11
[INFO] [stderr]    |
[INFO] [stderr] 15 |       let mut row: usize = nodes;
[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/istree.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn tree(mut adj_list: &mut Vec< Vec<usize>>,mut visited: &mut Vec<bool>,index:usize,flag:bool,nodes: usize)->bool{
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:38:45
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn tree(mut adj_list: &mut Vec< Vec<usize>>,mut visited: &mut Vec<bool>,index:usize,flag:bool,nodes: usize)->bool{
[INFO] [stderr]    |                                             ----^^^^^^^
[INFO] [stderr]    |                                             |
[INFO] [stderr]    |                                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:61:19
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn check_tree(mut adj_list_c: &mut Vec< Vec<usize>>,nodes: usize){
[INFO] [stderr]    |                   ----^^^^^^^^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |     let mut adj_list= Arc::new(Mutex::new(adj_list));
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/istree.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         unsafe {
[INFO] [stderr]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `row_del` should have an upper case name
[INFO] [stderr]  --> src/istree.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | static mut row_del: usize = 0;
[INFO] [stderr]   |            ^^^^^^^ help: convert the identifier to upper case: `ROW_DEL`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "c63c4a0f4e7895db74d5b527312cb6667908d848553832f380bee82a0c417cf9"`
[INFO] running `"docker" "rm" "-f" "c63c4a0f4e7895db74d5b527312cb6667908d848553832f380bee82a0c417cf9"`
[INFO] [stdout] c63c4a0f4e7895db74d5b527312cb6667908d848553832f380bee82a0c417cf9
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a71a532e69a079d74edea620bc35d53b95c9d460fb08422247983c15ce2d91d3
[INFO] running `"docker" "start" "-a" "a71a532e69a079d74edea620bc35d53b95c9d460fb08422247983c15ce2d91d3"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/istree.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/istree.rs:82:40
[INFO] [stderr]    |
[INFO] [stderr] 82 |                     let mut adj_list = (adj_list.lock().unwrap());
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:15:11
[INFO] [stderr]    |
[INFO] [stderr] 15 |       let mut row: usize = nodes;
[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/istree.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn tree(mut adj_list: &mut Vec< Vec<usize>>,mut visited: &mut Vec<bool>,index:usize,flag:bool,nodes: usize)->bool{
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:38:45
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn tree(mut adj_list: &mut Vec< Vec<usize>>,mut visited: &mut Vec<bool>,index:usize,flag:bool,nodes: usize)->bool{
[INFO] [stderr]    |                                             ----^^^^^^^
[INFO] [stderr]    |                                             |
[INFO] [stderr]    |                                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/istree.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:61:19
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn check_tree(mut adj_list_c: &mut Vec< Vec<usize>>,nodes: usize){
[INFO] [stderr]    |                   ----^^^^^^^^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |     let mut adj_list= Arc::new(Mutex::new(adj_list));
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/istree.rs:82:40
[INFO] [stderr]    |
[INFO] [stderr] 82 |                     let mut adj_list = (adj_list.lock().unwrap());
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/istree.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         unsafe {
[INFO] [stderr]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `row_del` should have an upper case name
[INFO] [stderr]  --> src/istree.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | static mut row_del: usize = 0;
[INFO] [stderr]   |            ^^^^^^^ help: convert the identifier to upper case: `ROW_DEL`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:15:11
[INFO] [stderr]    |
[INFO] [stderr] 15 |       let mut row: usize = nodes;
[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/istree.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn tree(mut adj_list: &mut Vec< Vec<usize>>,mut visited: &mut Vec<bool>,index:usize,flag:bool,nodes: usize)->bool{
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:38:45
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn tree(mut adj_list: &mut Vec< Vec<usize>>,mut visited: &mut Vec<bool>,index:usize,flag:bool,nodes: usize)->bool{
[INFO] [stderr]    |                                             ----^^^^^^^
[INFO] [stderr]    |                                             |
[INFO] [stderr]    |                                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:61:19
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn check_tree(mut adj_list_c: &mut Vec< Vec<usize>>,nodes: usize){
[INFO] [stderr]    |                   ----^^^^^^^^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/istree.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |     let mut adj_list= Arc::new(Mutex::new(adj_list));
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/istree.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         unsafe {
[INFO] [stderr]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `row_del` should have an upper case name
[INFO] [stderr]  --> src/istree.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | static mut row_del: usize = 0;
[INFO] [stderr]   |            ^^^^^^^ help: convert the identifier to upper case: `ROW_DEL`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:27:56
[INFO] [stderr]    |
[INFO] [stderr] 27 | ...                   Error::description(&why)),
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:34:56
[INFO] [stderr]    |
[INFO] [stderr] 34 | ...                   Error::description(&why)),
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/tree-ceb31d8b49f7f1c2
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/tree-fa0b5127a744ca35
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tree
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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] [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 `"docker" "inspect" "a71a532e69a079d74edea620bc35d53b95c9d460fb08422247983c15ce2d91d3"`
[INFO] running `"docker" "rm" "-f" "a71a532e69a079d74edea620bc35d53b95c9d460fb08422247983c15ce2d91d3"`
[INFO] [stdout] a71a532e69a079d74edea620bc35d53b95c9d460fb08422247983c15ce2d91d3