[INFO] fetching crate bluetooth-rust 0.3.6...
[INFO] checking bluetooth-rust-0.3.6 against master#b2f1ccf524a3a4cf9c34545167cc23b659cf1cbd for pr-155499
[INFO] extracting crate bluetooth-rust 0.3.6 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate bluetooth-rust 0.3.6
[INFO] finished tweaking crates.io crate bluetooth-rust 0.3.6
[INFO] tweaked toml for crates.io crate bluetooth-rust 0.3.6 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate bluetooth-rust 0.3.6 on toolchain b2f1ccf524a3a4cf9c34545167cc23b659cf1cbd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b2f1ccf524a3a4cf9c34545167cc23b659cf1cbd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate bluetooth-rust 0.3.6 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" "+b2f1ccf524a3a4cf9c34545167cc23b659cf1cbd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded custom_debug v0.6.2
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[INFO] [stderr]   Downloaded bluer v0.17.3
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[INFO] [stdout] f4f84d6bf6402ac8363df74d6bd32f3298e27135858c4ccb6d4be02825621495
[INFO] running `Command { std: "docker" "start" "-a" "f4f84d6bf6402ac8363df74d6bd32f3298e27135858c4ccb6d4be02825621495", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4f84d6bf6402ac8363df74d6bd32f3298e27135858c4ccb6d4be02825621495", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4f84d6bf6402ac8363df74d6bd32f3298e27135858c4ccb6d4be02825621495", kill_on_drop: false }`
[INFO] [stdout] f4f84d6bf6402ac8363df74d6bd32f3298e27135858c4ccb6d4be02825621495
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+b2f1ccf524a3a4cf9c34545167cc23b659cf1cbd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b235867f176ab6f287ed0ffba60ec1738f0c1fbef17b1baf0d08b74410a9bf69
[INFO] running `Command { std: "docker" "start" "-a" "b235867f176ab6f287ed0ffba60ec1738f0c1fbef17b1baf0d08b74410a9bf69", kill_on_drop: false }`
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[INFO] [stderr]    Compiling bluer v0.17.3
[INFO] [stderr]     Checking bluetooth-rust v0.3.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/lib.rs:349:9
[INFO] [stdout]     |
[INFO] [stdout] 339 | /             return Ok(BluetoothAdapter::Bluez(
[INFO] [stdout] 340 | |                 linux::BluetoothHandler::new(self.s.unwrap()).await?,
[INFO] [stdout] 341 | |             ));
[INFO] [stdout]     | |______________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 349 |           Err("No async builders available".to_string())
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/lib.rs:349:9
[INFO] [stdout]     |
[INFO] [stdout] 339 | /             return Ok(BluetoothAdapter::Bluez(
[INFO] [stdout] 340 | |                 linux::BluetoothHandler::new(self.s.unwrap()).await?,
[INFO] [stdout] 341 | |             ));
[INFO] [stdout]     | |______________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 349 |           Err("No async builders available".to_string())
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `enable` and `disable` are never used
[INFO] [stdout]    --> src/linux.rs:591:14
[INFO] [stdout]     |
[INFO] [stdout] 556 | impl BluetoothHandler {
[INFO] [stdout]     | --------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 591 |     async fn enable(&mut self) {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 599 |     async fn disable(&mut self) {
[INFO] [stdout]     |              ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:240:9
[INFO] [stdout]     |
[INFO] [stdout] 240 |         &mut self,
[INFO] [stdout]     |         ^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] ...
[INFO] [stdout] 243 |     ) -> Result<BluetoothSocket, String>;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 243 |     ) -> Result<BluetoothSocket<'_>, String>;
[INFO] [stdout]     |                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:247:9
[INFO] [stdout]     |
[INFO] [stdout] 247 |         &mut self,
[INFO] [stdout]     |         ^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] ...
[INFO] [stdout] 250 |     ) -> Result<BluetoothSocket, String>;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 250 |     ) -> Result<BluetoothSocket<'_>, String>;
[INFO] [stdout]     |                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]    --> src/lib.rs:515:5
[INFO] [stdout]     |
[INFO] [stdout] 515 |     async fn accept(self) -> Result<BluetoothStream, String>;
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]     = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]     |
[INFO] [stdout] 515 -     async fn accept(self) -> Result<BluetoothStream, String>;
[INFO] [stdout] 515 +     fn accept(self) -> impl std::future::Future<Output = Result<BluetoothStream, String>> + Send;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]    --> src/lib.rs:548:5
[INFO] [stdout]     |
[INFO] [stdout] 548 |     async fn connectable(&mut self) -> Result<BluetoothRfcommConnectableAsync, String>;
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]     |
[INFO] [stdout] 548 -     async fn connectable(&mut self) -> Result<BluetoothRfcommConnectableAsync, String>;
[INFO] [stdout] 548 +     fn connectable(&mut self) -> impl std::future::Future<Output = Result<BluetoothRfcommConnectableAsync, String>> + Send;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `enable` and `disable` are never used
[INFO] [stdout]    --> src/linux.rs:591:14
[INFO] [stdout]     |
[INFO] [stdout] 556 | impl BluetoothHandler {
[INFO] [stdout]     | --------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 591 |     async fn enable(&mut self) {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 599 |     async fn disable(&mut self) {
[INFO] [stdout]     |              ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:240:9
[INFO] [stdout]     |
[INFO] [stdout] 240 |         &mut self,
[INFO] [stdout]     |         ^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] ...
[INFO] [stdout] 243 |     ) -> Result<BluetoothSocket, String>;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 243 |     ) -> Result<BluetoothSocket<'_>, String>;
[INFO] [stdout]     |                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:247:9
[INFO] [stdout]     |
[INFO] [stdout] 247 |         &mut self,
[INFO] [stdout]     |         ^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] ...
[INFO] [stdout] 250 |     ) -> Result<BluetoothSocket, String>;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 250 |     ) -> Result<BluetoothSocket<'_>, String>;
[INFO] [stdout]     |                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]    --> src/lib.rs:515:5
[INFO] [stdout]     |
[INFO] [stdout] 515 |     async fn accept(self) -> Result<BluetoothStream, String>;
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]     = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]     |
[INFO] [stdout] 515 -     async fn accept(self) -> Result<BluetoothStream, String>;
[INFO] [stdout] 515 +     fn accept(self) -> impl std::future::Future<Output = Result<BluetoothStream, String>> + Send;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]    --> src/lib.rs:548:5
[INFO] [stdout]     |
[INFO] [stdout] 548 |     async fn connectable(&mut self) -> Result<BluetoothRfcommConnectableAsync, String>;
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]     |
[INFO] [stdout] 548 -     async fn connectable(&mut self) -> Result<BluetoothRfcommConnectableAsync, String>;
[INFO] [stdout] 548 +     fn connectable(&mut self) -> impl std::future::Future<Output = Result<BluetoothRfcommConnectableAsync, String>> + Send;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.10s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: bluer v0.17.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "b235867f176ab6f287ed0ffba60ec1738f0c1fbef17b1baf0d08b74410a9bf69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b235867f176ab6f287ed0ffba60ec1738f0c1fbef17b1baf0d08b74410a9bf69", kill_on_drop: false }`
[INFO] [stdout] b235867f176ab6f287ed0ffba60ec1738f0c1fbef17b1baf0d08b74410a9bf69
