[INFO] cloning repository https://github.com/g610g/rust-repo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/g610g/rust-repo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fg610g%2Frust-repo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fg610g%2Frust-repo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 118b817af377c289861adbfe39bd6c93e4867d7d
[INFO] checking g610g/rust-repo against try#81185c2d21df0ba45fd33e65bbdce76dc0d89bd9 for pr-139646
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fg610g%2Frust-repo" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/g610g/rust-repo on toolchain 81185c2d21df0ba45fd33e65bbdce76dc0d89bd9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+81185c2d21df0ba45fd33e65bbdce76dc0d89bd9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/g610g/rust-repo
[INFO] finished tweaking git repo https://github.com/g610g/rust-repo
[INFO] tweaked toml for git repo https://github.com/g610g/rust-repo written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/g610g/rust-repo 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" "+81185c2d21df0ba45fd33e65bbdce76dc0d89bd9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+81185c2d21df0ba45fd33e65bbdce76dc0d89bd9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5cc6612d0861b93ef8f7495e0b6077e907b5e8c24b20a3cb3173f66700664871
[INFO] running `Command { std: "docker" "start" "-a" "5cc6612d0861b93ef8f7495e0b6077e907b5e8c24b20a3cb3173f66700664871", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5cc6612d0861b93ef8f7495e0b6077e907b5e8c24b20a3cb3173f66700664871", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cc6612d0861b93ef8f7495e0b6077e907b5e8c24b20a3cb3173f66700664871", kill_on_drop: false }`
[INFO] [stdout] 5cc6612d0861b93ef8f7495e0b6077e907b5e8c24b20a3cb3173f66700664871
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+81185c2d21df0ba45fd33e65bbdce76dc0d89bd9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 091ceb392a0b640e409c3ef70f7d10e17b176a3715f8c43b0b94ec873b2d80d9
[INFO] running `Command { std: "docker" "start" "-a" "091ceb392a0b640e409c3ef70f7d10e17b176a3715f8c43b0b94ec873b2d80d9", kill_on_drop: false }`
[INFO] [stderr]     Checking getrandom v0.2.11
[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 os_school v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/lexer/mod.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Transition` is more private than the item `StringState::transition`
[INFO] [stdout]   --> src/fsm/string.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn transition(&self, transition: &Transition) -> Result<StringState, StringState> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `StringState::transition` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Transition` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/fsm/string.rs:81:1
[INFO] [stdout]    |
[INFO] [stdout] 81 | enum Transition {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NumberFsm` is never constructed
[INFO] [stdout]  --> src/fsm/number.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 |     pub struct NumberFsm {
[INFO] [stdout]   |                ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NumberState` is never constructed
[INFO] [stdout]  --> src/fsm/number.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub struct NumberState {}
[INFO] [stdout]   |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tokens` is never read
[INFO] [stdout]   --> src/lexer/mod.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct Lexer {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 34 |     input: Vec<u8>,
[INFO] [stdout] 35 |     tokens: Vec<Token>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `walk_input`, `get_lexeme`, and `give_current_position` are never used
[INFO] [stdout]    --> src/lexer/mod.rs:64:8
[INFO] [stdout]     |
[INFO] [stdout] 39  | impl Lexer {
[INFO] [stdout]     | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 64  |     fn walk_input(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 84  |     fn get_lexeme(&mut self, lexeme_type: &str) -> Vec<u8> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     fn give_current_position(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Transition` is more private than the item `StringState::transition`
[INFO] [stdout]   --> src/fsm/string.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn transition(&self, transition: &Transition) -> Result<StringState, StringState> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `StringState::transition` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Transition` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/fsm/string.rs:81:1
[INFO] [stdout]    |
[INFO] [stdout] 81 | enum Transition {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NumberFsm` is never constructed
[INFO] [stdout]  --> src/fsm/number.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 |     pub struct NumberFsm {
[INFO] [stdout]   |                ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NumberState` is never constructed
[INFO] [stdout]  --> src/fsm/number.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub struct NumberState {}
[INFO] [stdout]   |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tokens` is never read
[INFO] [stdout]   --> src/lexer/mod.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct Lexer {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 34 |     input: Vec<u8>,
[INFO] [stdout] 35 |     tokens: Vec<Token>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `walk_input`, `get_lexeme`, and `give_current_position` are never used
[INFO] [stdout]    --> src/lexer/mod.rs:64:8
[INFO] [stdout]     |
[INFO] [stdout] 39  | impl Lexer {
[INFO] [stdout]     | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 64  |     fn walk_input(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 84  |     fn get_lexeme(&mut self, lexeme_type: &str) -> Vec<u8> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     fn give_current_position(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `codewars`
[INFO] [stdout]   --> src/bin/codewars.rs:99:5
[INFO] [stdout]    |
[INFO] [stdout] 99 | //}
[INFO] [stdout]    |    ^ consider adding a `main` function to `src/bin/codewars.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/bin/wc.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fs::{self, File},
[INFO] [stdout]   |          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `os_school` (bin "codewars") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/bin/wc.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fs::{self, File},
[INFO] [stdout]   |          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/bin/json-parser.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     lex.get_next_token();
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let _ = lex.get_next_token();
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/bin/json-parser.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     lex.get_next_token();
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let _ = lex.get_next_token();
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/bin/wc.rs:13:11
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Input(String),
[INFO] [stdout]    |     ----- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Args` 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] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 13 -     Input(String),
[INFO] [stdout] 13 +     Input(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/bin/wc.rs:13:11
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Input(String),
[INFO] [stdout]    |     ----- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Args` 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] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 13 -     Input(String),
[INFO] [stdout] 13 +     Input(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "091ceb392a0b640e409c3ef70f7d10e17b176a3715f8c43b0b94ec873b2d80d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "091ceb392a0b640e409c3ef70f7d10e17b176a3715f8c43b0b94ec873b2d80d9", kill_on_drop: false }`
[INFO] [stdout] 091ceb392a0b640e409c3ef70f7d10e17b176a3715f8c43b0b94ec873b2d80d9