[INFO] fetching crate serial2-tokio 0.1.25...
[INFO] testing serial2-tokio-0.1.25 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate serial2-tokio 0.1.25 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate serial2-tokio 0.1.25
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate serial2-tokio 0.1.25
[INFO] tweaked toml for crates.io crate serial2-tokio 0.1.25 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate serial2-tokio 0.1.25 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate serial2-tokio 0.1.25 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serial2 v0.2.38
[INFO] [stderr]   Downloaded assert2 v0.4.0
[INFO] [stderr]   Downloaded assert2-macros v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] dea25b1b7fe75dcbe016f4eff1bc5d45ef88f6692884cdb84ca8fdefa1e3b23d
[INFO] running `Command { std: "docker" "start" "dea25b1b7fe75dcbe016f4eff1bc5d45ef88f6692884cdb84ca8fdefa1e3b23d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dea25b1b7fe75dcbe016f4eff1bc5d45ef88f6692884cdb84ca8fdefa1e3b23d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "dea25b1b7fe75dcbe016f4eff1bc5d45ef88f6692884cdb84ca8fdefa1e3b23d" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dea25b1b7fe75dcbe016f4eff1bc5d45ef88f6692884cdb84ca8fdefa1e3b23d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "dea25b1b7fe75dcbe016f4eff1bc5d45ef88f6692884cdb84ca8fdefa1e3b23d" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.184
[INFO] [stderr]    Compiling socket2 v0.6.3
[INFO] [stderr]    Compiling mio v1.2.0
[INFO] [stderr]    Compiling serial2 v0.2.38
[INFO] [stderr]    Compiling tokio v1.51.0
[INFO] [stderr]    Compiling serial2-tokio v0.1.25 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 7.04s
[INFO] running `Command { std: "docker" "inspect" "dea25b1b7fe75dcbe016f4eff1bc5d45ef88f6692884cdb84ca8fdefa1e3b23d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "dea25b1b7fe75dcbe016f4eff1bc5d45ef88f6692884cdb84ca8fdefa1e3b23d" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]    Compiling assert2-macros v0.4.0
[INFO] [stderr]    Compiling bitflags v2.11.0
[INFO] [stderr]    Compiling tokio-macros v2.7.0
[INFO] [stderr]    Compiling serial2 v0.2.38
[INFO] [stderr]    Compiling unicode-width v0.2.2
[INFO] [stderr]    Compiling tokio v1.51.0
[INFO] [stderr]    Compiling terminal_size v0.4.4
[INFO] [stderr]    Compiling assert2 v0.4.0
[INFO] [stderr]    Compiling serial2-tokio v0.1.25 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no associated function or constant named `pair` found for struct `SerialPort` in the current scope
[INFO] [stdout]    --> tests/pair.rs:9:47
[INFO] [stdout]     |
[INFO] [stdout]   9 |     assert!(let Ok((mut a, mut b)) = SerialPort::pair());
[INFO] [stdout]     |                                                  ^^^^ associated function or constant not found in `SerialPort`
[INFO] [stdout]     |
[INFO] [stdout] note: if you're trying to build a new `SerialPort`, consider using `SerialPort::open` which returns `Result<SerialPort, std::io::Error>`
[INFO] [stdout]    --> src/lib.rs:107:2
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn open(path: impl AsRef<Path>, settings: impl IntoSettings) -> std::io::Result<Self> {
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serial2-tokio` (test "pair") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "dea25b1b7fe75dcbe016f4eff1bc5d45ef88f6692884cdb84ca8fdefa1e3b23d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dea25b1b7fe75dcbe016f4eff1bc5d45ef88f6692884cdb84ca8fdefa1e3b23d", kill_on_drop: false }`
[INFO] [stdout] dea25b1b7fe75dcbe016f4eff1bc5d45ef88f6692884cdb84ca8fdefa1e3b23d
