[INFO] fetching crate modbus-core 0.0.0...
[INFO] testing modbus-core-0.0.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate modbus-core 0.0.0 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate modbus-core 0.0.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate modbus-core 0.0.0
[INFO] finished tweaking crates.io crate modbus-core 0.0.0
[INFO] tweaked toml for crates.io crate modbus-core 0.0.0 written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b12af363439e6ecc420d452be6d33d825b03c7a24b38ce20a7d32197e2e1cad5
[INFO] running `Command { std: "docker" "start" "-a" "b12af363439e6ecc420d452be6d33d825b03c7a24b38ce20a7d32197e2e1cad5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b12af363439e6ecc420d452be6d33d825b03c7a24b38ce20a7d32197e2e1cad5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b12af363439e6ecc420d452be6d33d825b03c7a24b38ce20a7d32197e2e1cad5", kill_on_drop: false }`
[INFO] [stdout] b12af363439e6ecc420d452be6d33d825b03c7a24b38ce20a7d32197e2e1cad5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7120166986b759435f673a71945b2b19fb017fb0e6e2f3d1423c84a6c43a9879
[INFO] running `Command { std: "docker" "start" "-a" "7120166986b759435f673a71945b2b19fb017fb0e6e2f3d1423c84a6c43a9879", kill_on_drop: false }`
[INFO] [stderr]    Compiling modbus-core v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.08s
[INFO] running `Command { std: "docker" "inspect" "7120166986b759435f673a71945b2b19fb017fb0e6e2f3d1423c84a6c43a9879", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7120166986b759435f673a71945b2b19fb017fb0e6e2f3d1423c84a6c43a9879", kill_on_drop: false }`
[INFO] [stdout] 7120166986b759435f673a71945b2b19fb017fb0e6e2f3d1423c84a6c43a9879
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f7ae35c8395b43a8b1fc36cefd70440eec10ba1370dbafcbcc9e1ff9916284b
[INFO] running `Command { std: "docker" "start" "-a" "7f7ae35c8395b43a8b1fc36cefd70440eec10ba1370dbafcbcc9e1ff9916284b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling modbus-core v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.39s
[INFO] running `Command { std: "docker" "inspect" "7f7ae35c8395b43a8b1fc36cefd70440eec10ba1370dbafcbcc9e1ff9916284b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f7ae35c8395b43a8b1fc36cefd70440eec10ba1370dbafcbcc9e1ff9916284b", kill_on_drop: false }`
[INFO] [stdout] 7f7ae35c8395b43a8b1fc36cefd70440eec10ba1370dbafcbcc9e1ff9916284b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b4cd0552713501622694912b0822b49103fb9bc9286afec78fab4ccc22fd61a7
[INFO] running `Command { std: "docker" "start" "-a" "b4cd0552713501622694912b0822b49103fb9bc9286afec78fab4ccc22fd61a7", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/modbus_core-5a264164545c4b1c)
[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 modbus-core
[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" "b4cd0552713501622694912b0822b49103fb9bc9286afec78fab4ccc22fd61a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4cd0552713501622694912b0822b49103fb9bc9286afec78fab4ccc22fd61a7", kill_on_drop: false }`
[INFO] [stdout] b4cd0552713501622694912b0822b49103fb9bc9286afec78fab4ccc22fd61a7