[INFO] cloning repository https://github.com/dopeter/rust_sample
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dopeter/rust_sample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdopeter%2Frust_sample", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdopeter%2Frust_sample'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9f7d4afe11818870d0599e96a0e6cc5a21af6283
[INFO] testing dopeter/rust_sample against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdopeter%2Frust_sample" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dopeter/rust_sample on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dopeter/rust_sample
[INFO] finished tweaking git repo https://github.com/dopeter/rust_sample
[INFO] tweaked toml for git repo https://github.com/dopeter/rust_sample written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/dopeter/rust_sample already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e902ad307ae3bb2d6cd61ae04291db9541fc2c7287d5046fd0d78886d3015d54
[INFO] running `Command { std: "docker" "start" "-a" "e902ad307ae3bb2d6cd61ae04291db9541fc2c7287d5046fd0d78886d3015d54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e902ad307ae3bb2d6cd61ae04291db9541fc2c7287d5046fd0d78886d3015d54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e902ad307ae3bb2d6cd61ae04291db9541fc2c7287d5046fd0d78886d3015d54", kill_on_drop: false }`
[INFO] [stdout] e902ad307ae3bb2d6cd61ae04291db9541fc2c7287d5046fd0d78886d3015d54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 562f6a1f14c99313cba4eb2fe8381a0a5016a226515ee9aa1251770b435ee9cf
[INFO] running `Command { std: "docker" "start" "-a" "562f6a1f14c99313cba4eb2fe8381a0a5016a226515ee9aa1251770b435ee9cf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling hello_world_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | use std::io;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process::exit`
[INFO] [stdout]   --> src/main.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::process::exit;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]   --> src/main.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | use std::borrow::BorrowMut;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `algorithms::data_structure::priority_queue`
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | use algorithms::data_structure::priority_queue;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:66:54
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn test_open_file(filename: &str) -> Result<i32, Box<Error>> {
[INFO] [stdout]    |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:79:52
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn read_username_from_file() -> Result<String, Box<Error>> {
[INFO] [stdout]    |                                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_open_file`
[INFO] [stdout]   --> src/main.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn test_open_file(filename: &str) -> Result<i32, Box<Error>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]   --> src/main.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn read_username_from_file() -> Result<String, Box<Error>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `nodeId` should have a snake case name
[INFO] [stdout]  --> src/algorithms/data_structure/simply_graph.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     nodeId: usize,
[INFO] [stdout]   |     ^^^^^^ help: convert the identifier to snake case: `node_id`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `nodeName` should have a snake case name
[INFO] [stdout]  --> src/algorithms/data_structure/simply_graph.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     nodeName: String,
[INFO] [stdout]   |     ^^^^^^^^ help: convert the identifier to snake case: `node_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `nodeNums` should have a snake case name
[INFO] [stdout]   --> src/algorithms/data_structure/simply_graph.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     nodeNums: usize,
[INFO] [stdout]    |     ^^^^^^^^ help: convert the identifier to snake case: `node_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `nodeId` should have a snake case name
[INFO] [stdout]   --> src/algorithms/data_structure/simply_graph.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn new(nodeId: usize, nodeName: String) -> Node {
[INFO] [stdout]    |            ^^^^^^ help: convert the identifier to snake case: `node_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `nodeName` should have a snake case name
[INFO] [stdout]   --> src/algorithms/data_structure/simply_graph.rs:21:27
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn new(nodeId: usize, nodeName: String) -> Node {
[INFO] [stdout]    |                           ^^^^^^^^ help: convert the identifier to snake case: `node_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.50s
[INFO] running `Command { std: "docker" "inspect" "562f6a1f14c99313cba4eb2fe8381a0a5016a226515ee9aa1251770b435ee9cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "562f6a1f14c99313cba4eb2fe8381a0a5016a226515ee9aa1251770b435ee9cf", kill_on_drop: false }`
[INFO] [stdout] 562f6a1f14c99313cba4eb2fe8381a0a5016a226515ee9aa1251770b435ee9cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1381a23a8810598d76c25e76764e1ee9c83a1b779b85901502140e1032d6eb4d
[INFO] running `Command { std: "docker" "start" "-a" "1381a23a8810598d76c25e76764e1ee9c83a1b779b85901502140e1032d6eb4d", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello_world_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | use std::io;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process::exit`
[INFO] [stdout]   --> src/main.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::process::exit;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]   --> src/main.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | use std::borrow::BorrowMut;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `algorithms::data_structure::priority_queue`
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | use algorithms::data_structure::priority_queue;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:66:54
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn test_open_file(filename: &str) -> Result<i32, Box<Error>> {
[INFO] [stdout]    |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:79:52
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn read_username_from_file() -> Result<String, Box<Error>> {
[INFO] [stdout]    |                                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_open_file`
[INFO] [stdout]   --> src/main.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn test_open_file(filename: &str) -> Result<i32, Box<Error>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]   --> src/main.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn read_username_from_file() -> Result<String, Box<Error>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `nodeId` should have a snake case name
[INFO] [stdout]  --> src/algorithms/data_structure/simply_graph.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     nodeId: usize,
[INFO] [stdout]   |     ^^^^^^ help: convert the identifier to snake case: `node_id`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `nodeName` should have a snake case name
[INFO] [stdout]  --> src/algorithms/data_structure/simply_graph.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     nodeName: String,
[INFO] [stdout]   |     ^^^^^^^^ help: convert the identifier to snake case: `node_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `nodeNums` should have a snake case name
[INFO] [stdout]   --> src/algorithms/data_structure/simply_graph.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     nodeNums: usize,
[INFO] [stdout]    |     ^^^^^^^^ help: convert the identifier to snake case: `node_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `nodeId` should have a snake case name
[INFO] [stdout]   --> src/algorithms/data_structure/simply_graph.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn new(nodeId: usize, nodeName: String) -> Node {
[INFO] [stdout]    |            ^^^^^^ help: convert the identifier to snake case: `node_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `nodeName` should have a snake case name
[INFO] [stdout]   --> src/algorithms/data_structure/simply_graph.rs:21:27
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn new(nodeId: usize, nodeName: String) -> Node {
[INFO] [stdout]    |                           ^^^^^^^^ help: convert the identifier to snake case: `node_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "1381a23a8810598d76c25e76764e1ee9c83a1b779b85901502140e1032d6eb4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1381a23a8810598d76c25e76764e1ee9c83a1b779b85901502140e1032d6eb4d", kill_on_drop: false }`
[INFO] [stdout] 1381a23a8810598d76c25e76764e1ee9c83a1b779b85901502140e1032d6eb4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 52aa073185bab2a66c099c6164185e496d9377eed3ffe7368dd7d1aeeb967036
[INFO] running `Command { std: "docker" "start" "-a" "52aa073185bab2a66c099c6164185e496d9377eed3ffe7368dd7d1aeeb967036", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]   --> src/main.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 | use std::io;
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::process::exit`
[INFO] [stderr]   --> src/main.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | use std::process::exit;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stderr]   --> src/main.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 | use std::borrow::BorrowMut;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `algorithms::data_structure::priority_queue`
[INFO] [stderr]   --> src/main.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 | use algorithms::data_structure::priority_queue;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:66:54
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn test_open_file(filename: &str) -> Result<i32, Box<Error>> {
[INFO] [stderr]    |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:79:52
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn read_username_from_file() -> Result<String, Box<Error>> {
[INFO] [stderr]    |                                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_open_file`
[INFO] [stderr]   --> src/main.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn test_open_file(filename: &str) -> Result<i32, Box<Error>> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_username_from_file`
[INFO] [stderr]   --> src/main.rs:79:4
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn read_username_from_file() -> Result<String, Box<Error>> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `nodeId` should have a snake case name
[INFO] [stderr]  --> src/algorithms/data_structure/simply_graph.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     nodeId: usize,
[INFO] [stderr]   |     ^^^^^^ help: convert the identifier to snake case: `node_id`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `nodeName` should have a snake case name
[INFO] [stderr]  --> src/algorithms/data_structure/simply_graph.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     nodeName: String,
[INFO] [stderr]   |     ^^^^^^^^ help: convert the identifier to snake case: `node_name`
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `nodeNums` should have a snake case name
[INFO] [stderr]   --> src/algorithms/data_structure/simply_graph.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     nodeNums: usize,
[INFO] [stderr]    |     ^^^^^^^^ help: convert the identifier to snake case: `node_nums`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `nodeId` should have a snake case name
[INFO] [stderr]   --> src/algorithms/data_structure/simply_graph.rs:21:12
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn new(nodeId: usize, nodeName: String) -> Node {
[INFO] [stderr]    |            ^^^^^^ help: convert the identifier to snake case: `node_id`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `nodeName` should have a snake case name
[INFO] [stderr]   --> src/algorithms/data_structure/simply_graph.rs:21:27
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn new(nodeId: usize, nodeName: String) -> Node {
[INFO] [stderr]    |                           ^^^^^^^^ help: convert the identifier to snake case: `node_name`
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/hello_world_rust-1df308c422945417)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "52aa073185bab2a66c099c6164185e496d9377eed3ffe7368dd7d1aeeb967036", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52aa073185bab2a66c099c6164185e496d9377eed3ffe7368dd7d1aeeb967036", kill_on_drop: false }`
[INFO] [stdout] 52aa073185bab2a66c099c6164185e496d9377eed3ffe7368dd7d1aeeb967036