[INFO] cloning repository https://github.com/nuonuo534/train
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nuonuo534/train" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnuonuo534%2Ftrain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnuonuo534%2Ftrain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b48d23d04a62666e4d79e53ffaf50dadba48db08
[INFO] checking nuonuo534/train against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnuonuo534%2Ftrain" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nuonuo534/train on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nuonuo534/train
[INFO] finished tweaking git repo https://github.com/nuonuo534/train
[INFO] tweaked toml for git repo https://github.com/nuonuo534/train written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/nuonuo534/train already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded indextree v4.6.0
[INFO] [stderr]   Downloaded filetime v0.2.20
[INFO] [stderr]   Downloaded clap_lex v0.3.2
[INFO] [stderr]   Downloaded clap v4.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77ef33d15d18601e76c89d3680349ad52e13b734dc5c3c5f2b042d488b2da268
[INFO] running `Command { std: "docker" "start" "-a" "77ef33d15d18601e76c89d3680349ad52e13b734dc5c3c5f2b042d488b2da268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77ef33d15d18601e76c89d3680349ad52e13b734dc5c3c5f2b042d488b2da268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77ef33d15d18601e76c89d3680349ad52e13b734dc5c3c5f2b042d488b2da268", kill_on_drop: false }`
[INFO] [stdout] 77ef33d15d18601e76c89d3680349ad52e13b734dc5c3c5f2b042d488b2da268
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bf793878c9a246c6b5aeee151ff75422dfecef59ca0016a5207449b85642421
[INFO] running `Command { std: "docker" "start" "-a" "2bf793878c9a246c6b5aeee151ff75422dfecef59ca0016a5207449b85642421", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling io-lifetimes v1.0.6
[INFO] [stderr]    Compiling rustix v0.36.9
[INFO] [stderr]     Checking linux-raw-sys v0.1.4
[INFO] [stderr]     Checking os_str_bytes v6.4.1
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking indextree v4.6.0
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking clap_lex v0.3.2
[INFO] [stderr]     Checking flate2 v1.0.25
[INFO] [stderr]     Checking regex v1.7.1
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking filetime v0.2.20
[INFO] [stderr]     Checking xattr v0.2.3
[INFO] [stderr]     Checking tar v0.4.38
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking is-terminal v0.4.4
[INFO] [stderr]     Checking clap v4.1.8
[INFO] [stderr]     Checking train v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BufWriter`
[INFO] [stdout]  --> src/example/tar.rs:3:26
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{BufReader, BufWriter};
[INFO] [stdout]   |                          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tar`
[INFO] [stdout]  --> src/main.rs:5:31
[INFO] [stdout]   |
[INFO] [stdout] 5 | use example::{algorithm, cli, tar};
[INFO] [stdout]   |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufWriter`
[INFO] [stdout]  --> src/example/tar.rs:3:26
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{BufReader, BufWriter};
[INFO] [stdout]   |                          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tar`
[INFO] [stdout]  --> src/main.rs:5:31
[INFO] [stdout]   |
[INFO] [stdout] 5 | use example::{algorithm, cli, tar};
[INFO] [stdout]   |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x`, `y`, and `z` are never read
[INFO] [stdout]   --> src/example/algorithm.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Point {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 28 |     x: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 29 |     y: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 30 |     z: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `basename` is never used
[INFO] [stdout]   --> src/example/tar.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn basename<'a>(path: &'a str, sep: char) -> Cow<'a, str> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode_file` is never used
[INFO] [stdout]   --> src/example/tar.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn decode_file(p: &str) -> Result<(), std::io::Error> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tar_file` is never used
[INFO] [stdout]   --> src/example/tar.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn tar_file(p: &str) -> Result<(), std::io::Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_variable_content1` is never used
[INFO] [stdout]  --> src/utils/format.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn string_variable_content1(str: &str, variable: HashMap<&str, &str>) -> String {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_variable_content2` is never used
[INFO] [stdout]   --> src/utils/format.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn string_variable_content2(str: &str, variable: HashMap<&str, &str>) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Tree` is never used
[INFO] [stdout]  --> src/utils/class.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub trait Tree {
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> src/utils/class.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Node {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `createTree` is never used
[INFO] [stdout]   --> src/utils/class.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn createTree(arr: Vec<Node>) -> Arena<Node> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/utils/class.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn test() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `createTree` should have a snake case name
[INFO] [stdout]   --> src/utils/class.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn createTree(arr: Vec<Node>) -> Arena<Node> {
[INFO] [stdout]    |        ^^^^^^^^^^ help: convert the identifier to snake case: `create_tree`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x`, `y`, and `z` are never read
[INFO] [stdout]   --> src/example/algorithm.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Point {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 28 |     x: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 29 |     y: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 30 |     z: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `basename` is never used
[INFO] [stdout]   --> src/example/tar.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn basename<'a>(path: &'a str, sep: char) -> Cow<'a, str> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode_file` is never used
[INFO] [stdout]   --> src/example/tar.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn decode_file(p: &str) -> Result<(), std::io::Error> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tar_file` is never used
[INFO] [stdout]   --> src/example/tar.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn tar_file(p: &str) -> Result<(), std::io::Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_variable_content1` is never used
[INFO] [stdout]  --> src/utils/format.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn string_variable_content1(str: &str, variable: HashMap<&str, &str>) -> String {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_variable_content2` is never used
[INFO] [stdout]   --> src/utils/format.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn string_variable_content2(str: &str, variable: HashMap<&str, &str>) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Tree` is never used
[INFO] [stdout]  --> src/utils/class.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub trait Tree {
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> src/utils/class.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Node {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `createTree` is never used
[INFO] [stdout]   --> src/utils/class.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn createTree(arr: Vec<Node>) -> Arena<Node> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/utils/class.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn test() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `createTree` should have a snake case name
[INFO] [stdout]   --> src/utils/class.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn createTree(arr: Vec<Node>) -> Arena<Node> {
[INFO] [stdout]    |        ^^^^^^^^^^ help: convert the identifier to snake case: `create_tree`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.73s
[INFO] running `Command { std: "docker" "inspect" "2bf793878c9a246c6b5aeee151ff75422dfecef59ca0016a5207449b85642421", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bf793878c9a246c6b5aeee151ff75422dfecef59ca0016a5207449b85642421", kill_on_drop: false }`
[INFO] [stdout] 2bf793878c9a246c6b5aeee151ff75422dfecef59ca0016a5207449b85642421