[INFO] cloning repository https://github.com/woodgear/tail-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/woodgear/tail-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwoodgear%2Ftail-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwoodgear%2Ftail-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1e9dcedd647b1683b004586fa6071251689b0454
[INFO] checking woodgear/tail-rust against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwoodgear%2Ftail-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/woodgear/tail-rust
[INFO] finished tweaking git repo https://github.com/woodgear/tail-rust
[INFO] tweaked toml for git repo https://github.com/woodgear/tail-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/woodgear/tail-rust on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/woodgear/tail-rust 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "2836f7aab85a1ef48bc821d717ee37626ae2f280fd04694dbb704b753a89e9ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2836f7aab85a1ef48bc821d717ee37626ae2f280fd04694dbb704b753a89e9ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2836f7aab85a1ef48bc821d717ee37626ae2f280fd04694dbb704b753a89e9ea", kill_on_drop: false }`
[INFO] [stdout] 2836f7aab85a1ef48bc821d717ee37626ae2f280fd04694dbb704b753a89e9ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 66a18daebb5dc07fd53764625b14d5ac6afbb0fe092f8b384268fdf293f2676c
[INFO] running `Command { std: "docker" "start" "-a" "66a18daebb5dc07fd53764625b14d5ac6afbb0fe092f8b384268fdf293f2676c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]     Checking futures v0.1.29
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[INFO] [stdout] warning: unused import: `bytes::BytesMut`
[INFO] [stdout]  --> src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bytes::BytesMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bytes::BytesMut`
[INFO] [stdout]  --> src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bytes::BytesMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Sender` and `channel`
[INFO] [stdout]   --> src/lib.rs:14:18
[INFO] [stdout]    |
[INFO] [stdout] 14 |     mpsc::{self, channel, Receiver, Sender},
[INFO] [stdout]    |                  ^^^^^^^            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Decoder`
[INFO] [stdout]   --> src/lib.rs:19:25
[INFO] [stdout]    |
[INFO] [stdout] 19 | use tokio_util::codec::{Decoder, FramedRead, LinesCodec};
[INFO] [stdout]    |                         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Sender` and `channel`
[INFO] [stdout]   --> src/lib.rs:14:18
[INFO] [stdout]    |
[INFO] [stdout] 14 |     mpsc::{self, channel, Receiver, Sender},
[INFO] [stdout]    |                  ^^^^^^^            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Decoder`
[INFO] [stdout]   --> src/lib.rs:19:25
[INFO] [stdout]    |
[INFO] [stdout] 19 | use tokio_util::codec::{Decoder, FramedRead, LinesCodec};
[INFO] [stdout]    |                         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:86:29
[INFO] [stdout]    |
[INFO] [stdout] 86 |                         let mut shared_state = shared_state_arc.lock().unwrap();
[INFO] [stdout]    |                             ----^^^^^^^^^^^^
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:112:18
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
[INFO] [stdout]     |                  ----^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:129:17
[INFO] [stdout]     |
[INFO] [stdout] 129 |             let mut shared_state = self.shared_state.lock().unwrap();
[INFO] [stdout]     |                 ----^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `watcher`, `inotify_thread_handle`, and `file` are never read
[INFO] [stdout]   --> src/lib.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct FileEventWatcher {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] 43 |     watcher: notify::RecommendedWatcher,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 44 |     shared_state: Arc<Mutex<SharedState>>,
[INFO] [stdout] 45 |     inotify_thread_handle: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 46 |     receiver: Receiver<FileEvent>,
[INFO] [stdout] 47 |     file: PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]    --> src/lib.rs:216:5
[INFO] [stdout]     |
[INFO] [stdout] 215 | pub struct Tail {
[INFO] [stdout]     |            ---- field in this struct
[INFO] [stdout] 216 |     path: PathBuf,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:85:25
[INFO] [stdout]    |
[INFO] [stdout] 85 |                         event_tx.send(FileEvent::from(event));
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 85 |                         let _ = event_tx.send(FileEvent::from(event));
[INFO] [stdout]    |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:95:25
[INFO] [stdout]    |
[INFO] [stdout] 95 |                         event_tx.send(FileEvent::Err);
[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] 95 |                         let _ = event_tx.send(FileEvent::Err);
[INFO] [stdout]    |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:200:21
[INFO] [stdout]     |
[INFO] [stdout] 200 |                     cache.write_all(&data);
[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] 200 |                     let _ = cache.write_all(&data);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:203:25
[INFO] [stdout]     |
[INFO] [stdout] 203 |                         buf.write_all(&mut cache);
[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] 203 |                         let _ = buf.write_all(&mut cache);
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:86:29
[INFO] [stdout]    |
[INFO] [stdout] 86 |                         let mut shared_state = shared_state_arc.lock().unwrap();
[INFO] [stdout]    |                             ----^^^^^^^^^^^^
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:112:18
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
[INFO] [stdout]     |                  ----^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:129:17
[INFO] [stdout]     |
[INFO] [stdout] 129 |             let mut shared_state = self.shared_state.lock().unwrap();
[INFO] [stdout]     |                 ----^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `watcher`, `inotify_thread_handle`, and `file` are never read
[INFO] [stdout]   --> src/lib.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct FileEventWatcher {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] 43 |     watcher: notify::RecommendedWatcher,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 44 |     shared_state: Arc<Mutex<SharedState>>,
[INFO] [stdout] 45 |     inotify_thread_handle: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 46 |     receiver: Receiver<FileEvent>,
[INFO] [stdout] 47 |     file: PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]    --> src/lib.rs:216:5
[INFO] [stdout]     |
[INFO] [stdout] 215 | pub struct Tail {
[INFO] [stdout]     |            ---- field in this struct
[INFO] [stdout] 216 |     path: PathBuf,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:85:25
[INFO] [stdout]    |
[INFO] [stdout] 85 |                         event_tx.send(FileEvent::from(event));
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 85 |                         let _ = event_tx.send(FileEvent::from(event));
[INFO] [stdout]    |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:95:25
[INFO] [stdout]    |
[INFO] [stdout] 95 |                         event_tx.send(FileEvent::Err);
[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] 95 |                         let _ = event_tx.send(FileEvent::Err);
[INFO] [stdout]    |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:200:21
[INFO] [stdout]     |
[INFO] [stdout] 200 |                     cache.write_all(&data);
[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] 200 |                     let _ = cache.write_all(&data);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:203:25
[INFO] [stdout]     |
[INFO] [stdout] 203 |                         buf.write_all(&mut cache);
[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] 203 |                         let _ = buf.write_all(&mut cache);
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.35s
[INFO] running `Command { std: "docker" "inspect" "66a18daebb5dc07fd53764625b14d5ac6afbb0fe092f8b384268fdf293f2676c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66a18daebb5dc07fd53764625b14d5ac6afbb0fe092f8b384268fdf293f2676c", kill_on_drop: false }`
[INFO] [stdout] 66a18daebb5dc07fd53764625b14d5ac6afbb0fe092f8b384268fdf293f2676c
