[INFO] fetching crate simple_modbus 0.1.1...
[INFO] testing simple_modbus-0.1.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate simple_modbus 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate simple_modbus 0.1.1
[INFO] finished tweaking crates.io crate simple_modbus 0.1.1
[INFO] tweaked toml for crates.io crate simple_modbus 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate simple_modbus 0.1.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 40 packages to latest compatible versions
[INFO] [stderr]       Adding env_logger v0.9.3 (available: v0.11.8)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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_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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 65f307479ab14630178a952d7cb4e0d115c48c1cc82d42364eeb246f4ac5096d
[INFO] running `Command { std: "docker" "start" "-a" "65f307479ab14630178a952d7cb4e0d115c48c1cc82d42364eeb246f4ac5096d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "65f307479ab14630178a952d7cb4e0d115c48c1cc82d42364eeb246f4ac5096d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65f307479ab14630178a952d7cb4e0d115c48c1cc82d42364eeb246f4ac5096d", kill_on_drop: false }`
[INFO] [stdout] 65f307479ab14630178a952d7cb4e0d115c48c1cc82d42364eeb246f4ac5096d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 472366b6cebc21734bcdf7c379b942fddaf2694e7653cb35e132dddf88d7b8fa
[INFO] running `Command { std: "docker" "start" "-a" "472366b6cebc21734bcdf7c379b942fddaf2694e7653cb35e132dddf88d7b8fa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling bitflags v2.9.4
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling anyhow v1.0.100
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling thiserror-impl v2.0.17
[INFO] [stderr]    Compiling nix v0.26.4
[INFO] [stderr]    Compiling libudev v0.3.0
[INFO] [stderr]    Compiling unescaper v0.1.6
[INFO] [stderr]    Compiling serialport v4.7.3
[INFO] [stderr]    Compiling simple_modbus v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Instant`
[INFO] [stdout]  --> src/lib.rs:6:27
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                           ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `code` is never used
[INFO] [stdout]    --> src/lib.rs:314:8
[INFO] [stdout]     |
[INFO] [stdout] 313 | impl Coil {
[INFO] [stdout]     | --------- method in this implementation
[INFO] [stdout] 314 |     fn code(self) -> u16 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.14s
[INFO] running `Command { std: "docker" "inspect" "472366b6cebc21734bcdf7c379b942fddaf2694e7653cb35e132dddf88d7b8fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "472366b6cebc21734bcdf7c379b942fddaf2694e7653cb35e132dddf88d7b8fa", kill_on_drop: false }`
[INFO] [stdout] 472366b6cebc21734bcdf7c379b942fddaf2694e7653cb35e132dddf88d7b8fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a221aedd709ab19f301b9b4ffda0e15cabdf597ad3d338747726734ac03140d
[INFO] running `Command { std: "docker" "start" "-a" "7a221aedd709ab19f301b9b4ffda0e15cabdf597ad3d338747726734ac03140d", kill_on_drop: false }`
[INFO] [stderr]    Compiling humantime v2.3.0
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling simple_modbus v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Instant`
[INFO] [stdout]  --> src/lib.rs:6:27
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                           ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `code` is never used
[INFO] [stdout]    --> src/lib.rs:314:8
[INFO] [stdout]     |
[INFO] [stdout] 313 | impl Coil {
[INFO] [stdout]     | --------- method in this implementation
[INFO] [stdout] 314 |     fn code(self) -> u16 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling regex-automata v0.4.11
[INFO] [stderr]    Compiling regex v1.11.3
[INFO] [stderr]    Compiling env_logger v0.9.3
[INFO] [stdout] warning: unused import: `Instant`
[INFO] [stdout]  --> src/lib.rs:6:27
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                           ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `code` is never used
[INFO] [stdout]    --> src/lib.rs:314:8
[INFO] [stdout]     |
[INFO] [stdout] 313 | impl Coil {
[INFO] [stdout]     | --------- method in this implementation
[INFO] [stdout] 314 |     fn code(self) -> u16 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 5.62s
[INFO] running `Command { std: "docker" "inspect" "7a221aedd709ab19f301b9b4ffda0e15cabdf597ad3d338747726734ac03140d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a221aedd709ab19f301b9b4ffda0e15cabdf597ad3d338747726734ac03140d", kill_on_drop: false }`
[INFO] [stdout] 7a221aedd709ab19f301b9b4ffda0e15cabdf597ad3d338747726734ac03140d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2f2b276fe5a352462d9134b73841260eb620a268b3dd05ceccff2b0f5ca211ca
[INFO] running `Command { std: "docker" "start" "-a" "2f2b276fe5a352462d9134b73841260eb620a268b3dd05ceccff2b0f5ca211ca", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `Instant`
[INFO] [stderr]  --> src/lib.rs:6:27
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::time::{Duration, Instant};
[INFO] [stderr]   |                           ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `code` is never used
[INFO] [stderr]    --> src/lib.rs:314:8
[INFO] [stderr]     |
[INFO] [stderr] 313 | impl Coil {
[INFO] [stderr]     | --------- method in this implementation
[INFO] [stderr] 314 |     fn code(self) -> u16 {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `simple_modbus` (lib) generated 2 warnings (run `cargo fix --lib -p simple_modbus` to apply 1 suggestion)
[INFO] [stderr] warning: `simple_modbus` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/simple_modbus-7bea6e5c59c5ffe1)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests simple_modbus
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2f2b276fe5a352462d9134b73841260eb620a268b3dd05ceccff2b0f5ca211ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f2b276fe5a352462d9134b73841260eb620a268b3dd05ceccff2b0f5ca211ca", kill_on_drop: false }`
[INFO] [stdout] 2f2b276fe5a352462d9134b73841260eb620a268b3dd05ceccff2b0f5ca211ca