[INFO] cloning repository https://github.com/laptou/bluetooth-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/laptou/bluetooth-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaptou%2Fbluetooth-rs", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 374c5c59f4fd1e69927cd9abf05eb64fae454a8a
[INFO] checking laptou/bluetooth-rs against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaptou%2Fbluetooth-rs" "/workspace/builds/worker-15/source", kill_on_drop: false }`
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[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/laptou/bluetooth-rs on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/laptou/bluetooth-rs
[INFO] removed 0 missing examples
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[INFO] crate git repo https://github.com/laptou/bluetooth-rs already has a lockfile, it will not be regenerated
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "9c25d835b3c12f24e22c0d26316b746ddc77288b2574286a665735b433655c1b", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr] note: Switching to Edition 2021 will enable the use of the version 2 feature resolver in Cargo.
[INFO] [stderr] This may cause some dependencies to be built with fewer features enabled than previously.
[INFO] [stderr] More information about the resolver changes may be found at https://doc.rust-lang.org/nightly/edition-guide/rust-2021/default-cargo-resolver.html
[INFO] [stderr] When building the following dependencies, the given features will no longer be used:
[INFO] [stderr] 
[INFO] [stderr]   futures-channel v0.3.15: default
[INFO] [stderr]   log v0.4.14: kv_unstable, value-bag
[INFO] [stderr]   syn v1.0.72 (as host dependency): visit
[INFO] [stderr] 
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]     Checking futures-io v0.3.15
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[INFO] [stderr]     Checking fastrand v1.4.1
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking once_cell v1.7.2
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[INFO] [stderr]    Compiling futures-channel v0.3.15
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[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-sink v0.3.15
[INFO] [stderr]    Compiling signal-hook v0.3.8
[INFO] [stderr]    Compiling radium v0.6.2
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[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
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[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking async-fs v1.5.0
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling enumflags2_derive v0.7.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking enumflags2 v0.7.1
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[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking thiserror v1.0.25
[INFO] [stderr]     Checking async-io v1.4.1
[INFO] [stderr]     Checking async-process v1.1.0
[INFO] [stderr]     Checking async-net v1.6.0
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[INFO] [stderr]     Checking smol v1.2.5
[INFO] [stderr]     Checking futures-executor v0.3.15
[INFO] [stderr]     Checking futures v0.3.15
[INFO] [stderr]     Checking bluez v0.4.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/communication/socket.rs (4 fixes)
[INFO] [stderr]    Migrating examples/l2cap-client.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/l2cap-server.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/discover.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/list.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed examples/l2cap-client.rs (1 fix)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/l2cap-client.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 53 | /             loop {
[INFO] [stdout] 54 | |                 reader.read_line(&mut line).await?;
[INFO] [stdout] 55 | |                 println!("> {}", line);
[INFO] [stdout] 56 | |                 line.clear();
[INFO] [stdout] 57 | |             }
[INFO] [stdout]    | |_____________- any code following this expression is unreachable
[INFO] [stdout] 58 | 
[INFO] [stdout] 59 |               std::io::Result::Ok(())
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/l2cap-client.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 70 | /             loop {
[INFO] [stdout] 71 | |                 stdin.read_line(&mut line).await?;
[INFO] [stdout] 72 | |                 writer.write(line.as_bytes()).await?;
[INFO] [stdout] 73 | |                 writer.flush().await?;
[INFO] [stdout] 74 | |                 println!("< {}", line);
[INFO] [stdout] 75 | |                 line.clear();
[INFO] [stdout] 76 | |             }
[INFO] [stdout]    | |_____________- any code following this expression is unreachable
[INFO] [stdout] 77 | 
[INFO] [stdout] 78 |               std::io::Result::Ok(())
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::AsyncReadExt`
[INFO] [stdout]   --> examples/l2cap-client.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use futures::AsyncReadExt;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/l2cap-server.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 47 | /                 loop {
[INFO] [stdout] 48 | |                     reader.read_line(&mut line).await?;
[INFO] [stdout] 49 | |                     println!("> {}", line);
[INFO] [stdout] 50 | |                     line.clear();
[INFO] [stdout] 51 | |                 }
[INFO] [stdout]    | |_________________- any code following this expression is unreachable
[INFO] [stdout] 52 | 
[INFO] [stdout] 53 |                   std::io::Result::Ok(())
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/l2cap-server.rs:73:17
[INFO] [stdout]    |
[INFO] [stdout] 65 | /                 loop {
[INFO] [stdout] 66 | |                     stdin.read_line(&mut line).await?;
[INFO] [stdout] 67 | |                     writer.write(line.as_bytes()).await?;
[INFO] [stdout] 68 | |                     writer.flush().await?;
[INFO] [stdout] 69 | |                     println!("< {}", line);
[INFO] [stdout] 70 | |                     line.clear();
[INFO] [stdout] 71 | |                 }
[INFO] [stdout]    | |_________________- any code following this expression is unreachable
[INFO] [stdout] 72 | 
[INFO] [stdout] 73 |                   std::io::Result::Ok(())
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.43s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling enumflags2_derive v0.7.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking value-bag v1.0.0-alpha.7
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking futures-util v0.3.15
[INFO] [stderr]     Checking enumflags2 v0.7.1
[INFO] [stderr]     Checking polling v2.0.3
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.4.1
[INFO] [stderr]     Checking thiserror v1.0.25
[INFO] [stderr]     Checking async-net v1.6.0
[INFO] [stderr]     Checking async-process v1.1.0
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking smol v1.2.5
[INFO] [stderr]     Checking futures-executor v0.3.15
[INFO] [stderr]     Checking futures v0.3.15
[INFO] [stderr]     Checking bluez v0.4.0 (/tmp/fixit)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/l2cap-server.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 47 | /                 loop {
[INFO] [stdout] 48 | |                     reader.read_line(&mut line).await?;
[INFO] [stdout] 49 | |                     println!("> {}", line);
[INFO] [stdout] 50 | |                     line.clear();
[INFO] [stdout] 51 | |                 }
[INFO] [stdout]    | |_________________- any code following this expression is unreachable
[INFO] [stdout] 52 | 
[INFO] [stdout] 53 |                   std::io::Result::Ok(())
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/l2cap-server.rs:73:17
[INFO] [stdout]    |
[INFO] [stdout] 65 | /                 loop {
[INFO] [stdout] 66 | |                     stdin.read_line(&mut line).await?;
[INFO] [stdout] 67 | |                     writer.write(line.as_bytes()).await?;
[INFO] [stdout] 68 | |                     writer.flush().await?;
[INFO] [stdout] 69 | |                     println!("< {}", line);
[INFO] [stdout] 70 | |                     line.clear();
[INFO] [stdout] 71 | |                 }
[INFO] [stdout]    | |_________________- any code following this expression is unreachable
[INFO] [stdout] 72 | 
[INFO] [stdout] 73 |                   std::io::Result::Ok(())
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/l2cap-client.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 53 | /             loop {
[INFO] [stdout] 54 | |                 reader.read_line(&mut line).await?;
[INFO] [stdout] 55 | |                 println!("> {}", line);
[INFO] [stdout] 56 | |                 line.clear();
[INFO] [stdout] 57 | |             }
[INFO] [stdout]    | |_____________- any code following this expression is unreachable
[INFO] [stdout] 58 | 
[INFO] [stdout] 59 |               std::io::Result::Ok(())
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/l2cap-client.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 70 | /             loop {
[INFO] [stdout] 71 | |                 stdin.read_line(&mut line).await?;
[INFO] [stdout] 72 | |                 writer.write(line.as_bytes()).await?;
[INFO] [stdout] 73 | |                 writer.flush().await?;
[INFO] [stdout] 74 | |                 println!("< {}", line);
[INFO] [stdout] 75 | |                 line.clear();
[INFO] [stdout] 76 | |             }
[INFO] [stdout]    | |_____________- any code following this expression is unreachable
[INFO] [stdout] 77 | 
[INFO] [stdout] 78 |               std::io::Result::Ok(())
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::AsyncReadExt`
[INFO] [stdout]   --> examples/l2cap-client.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use futures::AsyncReadExt;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.99s
[INFO] running `Command { std: "docker" "inspect" "9c25d835b3c12f24e22c0d26316b746ddc77288b2574286a665735b433655c1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c25d835b3c12f24e22c0d26316b746ddc77288b2574286a665735b433655c1b", kill_on_drop: false }`
[INFO] [stdout] 9c25d835b3c12f24e22c0d26316b746ddc77288b2574286a665735b433655c1b