[INFO] updating cached 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" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9f7d4afe11818870d0599e96a0e6cc5a21af6283
[INFO] testing dopeter/rust_sample against 1.45.2 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdopeter%2Frust_sample" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dopeter/rust_sample on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", 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-5/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" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", 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] fd14cf4e7d971e3ebfb02f73a71b71af3f44b3978a7c35fba42f6802b3fcd6f6
[INFO] running `Command { std: "docker" "start" "-a" "fd14cf4e7d971e3ebfb02f73a71b71af3f44b3978a7c35fba42f6802b3fcd6f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd14cf4e7d971e3ebfb02f73a71b71af3f44b3978a7c35fba42f6802b3fcd6f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd14cf4e7d971e3ebfb02f73a71b71af3f44b3978a7c35fba42f6802b3fcd6f6", kill_on_drop: false }`
[INFO] [stdout] fd14cf4e7d971e3ebfb02f73a71b71af3f44b3978a7c35fba42f6802b3fcd6f6
[INFO] running `Command { std: "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=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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e986ad3e4b81178f16a1ab3b18980de8055c43cd5576694a43f61a21b2fdb8f
[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" "3e986ad3e4b81178f16a1ab3b18980de8055c43cd5576694a43f61a21b2fdb8f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.60
[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] 
[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] 
[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 4.36s
[INFO] running `Command { std: "docker" "inspect" "3e986ad3e4b81178f16a1ab3b18980de8055c43cd5576694a43f61a21b2fdb8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e986ad3e4b81178f16a1ab3b18980de8055c43cd5576694a43f61a21b2fdb8f", kill_on_drop: false }`
[INFO] [stdout] 3e986ad3e4b81178f16a1ab3b18980de8055c43cd5576694a43f61a21b2fdb8f
[INFO] running `Command { std: "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=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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 006fcd0ea21e6c384556b8c373132b151a7dd5eec30161f4c1c4e3c5fb9ac5d4
[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" "006fcd0ea21e6c384556b8c373132b151a7dd5eec30161f4c1c4e3c5fb9ac5d4", 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] 
[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] 
[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 0.83s
[INFO] running `Command { std: "docker" "inspect" "006fcd0ea21e6c384556b8c373132b151a7dd5eec30161f4c1c4e3c5fb9ac5d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "006fcd0ea21e6c384556b8c373132b151a7dd5eec30161f4c1c4e3c5fb9ac5d4", kill_on_drop: false }`
[INFO] [stdout] 006fcd0ea21e6c384556b8c373132b151a7dd5eec30161f4c1c4e3c5fb9ac5d4
[INFO] running `Command { std: "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=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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d40099ae98485559e212a16972061dcc4705cc9c909b89dac007484f9ac6c1ca
[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" "d40099ae98485559e212a16972061dcc4705cc9c909b89dac007484f9ac6c1ca", 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] 
[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: 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 0.08s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/hello_world_rust-e3d13cb7cb2aef7e
[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" "d40099ae98485559e212a16972061dcc4705cc9c909b89dac007484f9ac6c1ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d40099ae98485559e212a16972061dcc4705cc9c909b89dac007484f9ac6c1ca", kill_on_drop: false }`
[INFO] [stdout] d40099ae98485559e212a16972061dcc4705cc9c909b89dac007484f9ac6c1ca