[INFO] cloning repository https://github.com/Congee/hunt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Congee/hunt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCongee%2Fhunt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCongee%2Fhunt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6be33058d6bb7f5fa55d7f3b93050ce0e75b748
[INFO] checking Congee/hunt against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCongee%2Fhunt" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Congee/hunt 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/Congee/hunt
[INFO] finished tweaking git repo https://github.com/Congee/hunt
[INFO] tweaked toml for git repo https://github.com/Congee/hunt written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Congee/hunt 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 anyhow v1.0.48
[INFO] [stderr]   Downloaded nix v0.23.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] ad9cc2d6243bf2d54e0caef77c3fb25054bb29fa52882a340b1a8c6e9995b4a0
[INFO] running `Command { std: "docker" "start" "-a" "ad9cc2d6243bf2d54e0caef77c3fb25054bb29fa52882a340b1a8c6e9995b4a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad9cc2d6243bf2d54e0caef77c3fb25054bb29fa52882a340b1a8c6e9995b4a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad9cc2d6243bf2d54e0caef77c3fb25054bb29fa52882a340b1a8c6e9995b4a0", kill_on_drop: false }`
[INFO] [stdout] ad9cc2d6243bf2d54e0caef77c3fb25054bb29fa52882a340b1a8c6e9995b4a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2edca226f4c9e92baf22adbe01c4960f98c6a97006e78fd92fa4e43c8243f26e
[INFO] running `Command { std: "docker" "start" "-a" "2edca226f4c9e92baf22adbe01c4960f98c6a97006e78fd92fa4e43c8243f26e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling zstd-safe v4.1.1+zstd.1.5.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling anyhow v1.0.48
[INFO] [stderr]    Compiling fst v0.4.7
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking tinyvec v1.5.1
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking fuzzy-matcher v0.3.7
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.23.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling zstd-sys v1.6.1+zstd.1.5.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking zstd v0.9.0+zstd.1.5.0
[INFO] [stderr]     Checking hunt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `libc` is imported redundantly
[INFO] [stdout]   --> src/fanotify.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | use libc;
[INFO] [stdout]    |     ^^^^ the item `libc` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `unicode_normalization` is imported redundantly
[INFO] [stdout]  --> src/store.rs:5:29
[INFO] [stdout]   |
[INFO] [stdout] 5 | use unicode_normalization::{self, UnicodeNormalization};
[INFO] [stdout]   |                             ^^^^ the item `unicode_normalization` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::foo`
[INFO] [stdout]   --> src/store.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub use super::foo;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::Result`
[INFO] [stdout]  --> src/dfa.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Dfa`
[INFO] [stdout]   --> src/dfa.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub use super::Dfa;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `libc` is imported redundantly
[INFO] [stdout]   --> src/fanotify.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | use libc;
[INFO] [stdout]    |     ^^^^ the item `libc` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `unicode_normalization` is imported redundantly
[INFO] [stdout]  --> src/store.rs:5:29
[INFO] [stdout]   |
[INFO] [stdout] 5 | use unicode_normalization::{self, UnicodeNormalization};
[INFO] [stdout]   |                             ^^^^ the item `unicode_normalization` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::foo`
[INFO] [stdout]   --> src/store.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub use super::foo;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::Result`
[INFO] [stdout]  --> src/dfa.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Dfa`
[INFO] [stdout]   --> src/dfa.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub use super::Dfa;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]   --> src/store.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         for ch in line.chars() {}
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Opt {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 17 |     #[structopt(parse(from_os_str))]
[INFO] [stdout] 18 |     path: std::path::PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opt` 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 `print` is never used
[INFO] [stdout]   --> src/main.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn print<T: std::fmt::Display>(path: T) -> std::io::Result<()> {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handle_event` is never used
[INFO] [stdout]   --> src/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn handle_event(ev: &Event) -> std::io::Result<()> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn run() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `prepare_fd` is never used
[INFO] [stdout]   --> src/fanotify.rs:27:15
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub unsafe fn prepare_fd<P: AsRef<std::path::Path>>(__path: P) -> Result<libc::c_int> {
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BATCH` is never used
[INFO] [stdout]   --> src/fanotify.rs:71:7
[INFO] [stdout]    |
[INFO] [stdout] 71 | const BATCH: usize = 200;
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Metadata` is never used
[INFO] [stdout]   --> src/fanotify.rs:72:6
[INFO] [stdout]    |
[INFO] [stdout] 72 | type Metadata = libc::fanotify_event_metadata;
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FAN_EVENT_METADATA_LEN` is never used
[INFO] [stdout]   --> src/fanotify.rs:73:7
[INFO] [stdout]    |
[INFO] [stdout] 73 | const FAN_EVENT_METADATA_LEN: usize = std::mem::size_of::<Metadata>();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handle_metadata` is never used
[INFO] [stdout]   --> src/fanotify.rs:75:15
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub unsafe fn handle_metadata(buf: *const Metadata, tx: &Sender<Event>) -> Result<()> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `poll` is never used
[INFO] [stdout]    --> src/fanotify.rs:152:15
[INFO] [stdout]     |
[INFO] [stdout] 152 | pub unsafe fn poll(fd: libc::c_int, tx: &Sender<Event>) -> Result<()> {
[INFO] [stdout]     |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Create`, `Delete`, and `Move` are never constructed
[INFO] [stdout]    --> src/fanotify.rs:172:5
[INFO] [stdout]     |
[INFO] [stdout] 171 | pub enum Event {
[INFO] [stdout]     |          ----- variants in this enum
[INFO] [stdout] 172 |     Create(String),
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 173 |     Delete(String),
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 174 |     Move(String, String),
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Event` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Trie` is never constructed
[INFO] [stdout]   --> src/store.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Trie {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `from` and `insert_line` are never used
[INFO] [stdout]   --> src/store.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Trie {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 17 |     fn from(&self, lines: impl Iterator<Item = String>) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     fn insert_line(&self, line: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `State` is never constructed
[INFO] [stdout]  --> src/dfa.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct State(String);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Symbol` is never constructed
[INFO] [stdout]  --> src/dfa.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Symbol(String);
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dfa` is never constructed
[INFO] [stdout]  --> src/dfa.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Dfa<State, Symbol> {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Automaton` is never used
[INFO] [stdout]   --> src/dfa.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | trait Automaton {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MyState` is never used
[INFO] [stdout]   --> src/dfa.rs:28:6
[INFO] [stdout]    |
[INFO] [stdout] 28 | enum MyState {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MySymbol` is never used
[INFO] [stdout]   --> src/dfa.rs:35:6
[INFO] [stdout]    |
[INFO] [stdout] 35 | enum MySymbol {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `accepts` are never used
[INFO] [stdout]   --> src/dfa.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl Dfa<MyState, MySymbol> {
[INFO] [stdout]    | --------------------------- associated items in this implementation
[INFO] [stdout] 41 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn accepts(&self, input: &[MySymbol]) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     send.join();
[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] 46 |     let _ = send.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     recv.join();
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let _ = recv.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 28 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]   --> src/store.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         for ch in line.chars() {}
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Opt {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 17 |     #[structopt(parse(from_os_str))]
[INFO] [stdout] 18 |     path: std::path::PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opt` 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 `print` is never used
[INFO] [stdout]   --> src/main.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn print<T: std::fmt::Display>(path: T) -> std::io::Result<()> {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handle_event` is never used
[INFO] [stdout]   --> src/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn handle_event(ev: &Event) -> std::io::Result<()> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn run() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `prepare_fd` is never used
[INFO] [stdout]   --> src/fanotify.rs:27:15
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub unsafe fn prepare_fd<P: AsRef<std::path::Path>>(__path: P) -> Result<libc::c_int> {
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BATCH` is never used
[INFO] [stdout]   --> src/fanotify.rs:71:7
[INFO] [stdout]    |
[INFO] [stdout] 71 | const BATCH: usize = 200;
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Metadata` is never used
[INFO] [stdout]   --> src/fanotify.rs:72:6
[INFO] [stdout]    |
[INFO] [stdout] 72 | type Metadata = libc::fanotify_event_metadata;
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FAN_EVENT_METADATA_LEN` is never used
[INFO] [stdout]   --> src/fanotify.rs:73:7
[INFO] [stdout]    |
[INFO] [stdout] 73 | const FAN_EVENT_METADATA_LEN: usize = std::mem::size_of::<Metadata>();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handle_metadata` is never used
[INFO] [stdout]   --> src/fanotify.rs:75:15
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub unsafe fn handle_metadata(buf: *const Metadata, tx: &Sender<Event>) -> Result<()> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `poll` is never used
[INFO] [stdout]    --> src/fanotify.rs:152:15
[INFO] [stdout]     |
[INFO] [stdout] 152 | pub unsafe fn poll(fd: libc::c_int, tx: &Sender<Event>) -> Result<()> {
[INFO] [stdout]     |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Create`, `Delete`, and `Move` are never constructed
[INFO] [stdout]    --> src/fanotify.rs:172:5
[INFO] [stdout]     |
[INFO] [stdout] 171 | pub enum Event {
[INFO] [stdout]     |          ----- variants in this enum
[INFO] [stdout] 172 |     Create(String),
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 173 |     Delete(String),
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 174 |     Move(String, String),
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Event` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Trie` is never constructed
[INFO] [stdout]   --> src/store.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Trie {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `from` and `insert_line` are never used
[INFO] [stdout]   --> src/store.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Trie {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 17 |     fn from(&self, lines: impl Iterator<Item = String>) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     fn insert_line(&self, line: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `State` is never constructed
[INFO] [stdout]  --> src/dfa.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct State(String);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Symbol` is never constructed
[INFO] [stdout]  --> src/dfa.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Symbol(String);
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `states` and `input_symbols` are never read
[INFO] [stdout]   --> src/dfa.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub struct Dfa<State, Symbol> {
[INFO] [stdout]    |            --- fields in this struct
[INFO] [stdout] 9  |     states: Vec<State>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 10 |     input_symbols: HashSet<Symbol>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Automaton` is never used
[INFO] [stdout]   --> src/dfa.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | trait Automaton {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     send.join();
[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] 46 |     let _ = send.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     recv.join();
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let _ = recv.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 25 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 53.66s
[INFO] running `Command { std: "docker" "inspect" "2edca226f4c9e92baf22adbe01c4960f98c6a97006e78fd92fa4e43c8243f26e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2edca226f4c9e92baf22adbe01c4960f98c6a97006e78fd92fa4e43c8243f26e", kill_on_drop: false }`
[INFO] [stdout] 2edca226f4c9e92baf22adbe01c4960f98c6a97006e78fd92fa4e43c8243f26e