[INFO] fetching crate twinkle 0.1.3...
[INFO] checking twinkle-0.1.3 against try#a243773eaf3fedcd203f10ae4579e4f106bf7ccd for pr-68325
[INFO] extracting crate twinkle 0.1.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate twinkle 0.1.3 on toolchain a243773eaf3fedcd203f10ae4579e4f106bf7ccd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate twinkle 0.1.3
[INFO] finished tweaking crates.io crate twinkle 0.1.3
[INFO] tweaked toml for crates.io crate twinkle 0.1.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] be3640b833a3a1b56c90051da2e79b2f52040e21d1b976c8771b9fa1f1163aaa
[INFO] running `"docker" "start" "-a" "be3640b833a3a1b56c90051da2e79b2f52040e21d1b976c8771b9fa1f1163aaa"`
[INFO] [stderr]     Checking tokio v0.2.10
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking twinkle v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `crate::errors::*`
[INFO] [stderr]   --> src/listener.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crate::errors::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::errors::*`
[INFO] [stderr]  --> src/request.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::errors::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/request.rs:16:34
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn issue(self) -> Result<(Packet), std::io::Error> {
[INFO] [stderr]    |                                  ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::errors::*`
[INFO] [stderr]  --> src/packet.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use crate::errors::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future::join`
[INFO] [stderr]   --> src/lib.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 | use futures::future::join;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::time::timeout`
[INFO] [stderr]   --> src/lib.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 | use tokio::time::timeout;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Duration`
[INFO] [stderr]   --> src/lib.rs:43:17
[INFO] [stderr]    |
[INFO] [stderr] 43 | use std::time::{Duration};
[INFO] [stderr]    |                 ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ErrorKind`, `Error`
[INFO] [stderr]   --> src/lib.rs:44:15
[INFO] [stderr]    |
[INFO] [stderr] 44 | use std::io::{Error, ErrorKind};
[INFO] [stderr]    |               ^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `TIMEOUT`
[INFO] [stderr]   --> src/types.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub const TIMEOUT: Duration = Duration::from_secs(1);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `TwinkleError`
[INFO] [stderr]  --> src/errors.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub enum TwinkleError {
[INFO] [stderr]   |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/dispatcher.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |             sock.send(&b).await;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::errors::*`
[INFO] [stderr]   --> src/listener.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crate::errors::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::errors::*`
[INFO] [stderr]  --> src/request.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::errors::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/request.rs:16:34
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn issue(self) -> Result<(Packet), std::io::Error> {
[INFO] [stderr]    |                                  ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::errors::*`
[INFO] [stderr]  --> src/packet.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use crate::errors::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `TIMEOUT`
[INFO] [stderr]   --> src/types.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub const TIMEOUT: Duration = Duration::from_secs(1);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `TwinkleError`
[INFO] [stderr]  --> src/errors.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub enum TwinkleError {
[INFO] [stderr]   |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/dispatcher.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |             sock.send(&b).await;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/lib.rs:71:17
[INFO] [stderr]    |
[INFO] [stderr] 71 |                 client.unset(b"hoge".to_vec()).await;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/lib.rs:86:17
[INFO] [stderr]    |
[INFO] [stderr] 86 |                 client.set(b"fuga".to_vec(), b"foo".to_vec()).await;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.88s
[INFO] running `"docker" "inspect" "be3640b833a3a1b56c90051da2e79b2f52040e21d1b976c8771b9fa1f1163aaa"`
[INFO] running `"docker" "rm" "-f" "be3640b833a3a1b56c90051da2e79b2f52040e21d1b976c8771b9fa1f1163aaa"`
[INFO] [stdout] be3640b833a3a1b56c90051da2e79b2f52040e21d1b976c8771b9fa1f1163aaa