[INFO] updating cached repository mvirkkunen/serial-threadmark
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mvirkkunen/serial-threadmark
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mvirkkunen/serial-threadmark" "work/ex/beta-1.38-1/sources/1.37.0/gh/mvirkkunen/serial-threadmark"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mvirkkunen/serial-threadmark'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mvirkkunen/serial-threadmark" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mvirkkunen/serial-threadmark"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mvirkkunen/serial-threadmark'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d9660231d0c94eab214e1a6df523dff0322f4730
[INFO] sha for GitHub repo mvirkkunen/serial-threadmark: d9660231d0c94eab214e1a6df523dff0322f4730
[INFO] validating manifest of mvirkkunen/serial-threadmark on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mvirkkunen/serial-threadmark on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mvirkkunen/serial-threadmark
[INFO] finished frobbing mvirkkunen/serial-threadmark
[INFO] frobbed toml for mvirkkunen/serial-threadmark written to work/ex/beta-1.38-1/sources/1.37.0/gh/mvirkkunen/serial-threadmark/Cargo.toml
[INFO] started frobbing mvirkkunen/serial-threadmark
[INFO] finished frobbing mvirkkunen/serial-threadmark
[INFO] frobbed toml for mvirkkunen/serial-threadmark written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mvirkkunen/serial-threadmark/Cargo.toml
[INFO] crate mvirkkunen/serial-threadmark already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mvirkkunen/serial-threadmark against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mvirkkunen/serial-threadmark:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 0a60856240f924981771fba61221a59dfbe5fc324b2d081a9903071833cc5afd
[INFO] running `"docker" "start" "-a" "0a60856240f924981771fba61221a59dfbe5fc324b2d081a9903071833cc5afd"`
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling libudev v0.2.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling serialport v3.3.0
[INFO] [stderr]    Compiling serial-threadmark v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     tx_port.set_timeout(Duration::from_secs(1));
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.19s
[INFO] running `"docker" "inspect" "0a60856240f924981771fba61221a59dfbe5fc324b2d081a9903071833cc5afd"`
[INFO] running `"docker" "rm" "-f" "0a60856240f924981771fba61221a59dfbe5fc324b2d081a9903071833cc5afd"`
[INFO] [stdout] 0a60856240f924981771fba61221a59dfbe5fc324b2d081a9903071833cc5afd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mvirkkunen/serial-threadmark:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 967aa0d99511c2f5d8b6ad0d915644048f4b103ceeb408dff62d8fe8b9799761
[INFO] running `"docker" "start" "-a" "967aa0d99511c2f5d8b6ad0d915644048f4b103ceeb408dff62d8fe8b9799761"`
[INFO] [stderr]    Compiling serial-threadmark v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     tx_port.set_timeout(Duration::from_secs(1));
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `"docker" "inspect" "967aa0d99511c2f5d8b6ad0d915644048f4b103ceeb408dff62d8fe8b9799761"`
[INFO] running `"docker" "rm" "-f" "967aa0d99511c2f5d8b6ad0d915644048f4b103ceeb408dff62d8fe8b9799761"`
[INFO] [stdout] 967aa0d99511c2f5d8b6ad0d915644048f4b103ceeb408dff62d8fe8b9799761
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mvirkkunen/serial-threadmark:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] fc9b2959ed2222de02ebda5d050e4e99a6ef15e3694855b8eeb2fdb2bf65a7b2
[INFO] running `"docker" "start" "-a" "fc9b2959ed2222de02ebda5d050e4e99a6ef15e3694855b8eeb2fdb2bf65a7b2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/serial_threadmark-21ccf8b31a9213ea
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "fc9b2959ed2222de02ebda5d050e4e99a6ef15e3694855b8eeb2fdb2bf65a7b2"`
[INFO] running `"docker" "rm" "-f" "fc9b2959ed2222de02ebda5d050e4e99a6ef15e3694855b8eeb2fdb2bf65a7b2"`
[INFO] [stdout] fc9b2959ed2222de02ebda5d050e4e99a6ef15e3694855b8eeb2fdb2bf65a7b2