[INFO] updating cached repository letaron/tacron
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/letaron/tacron
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/letaron/tacron" "work/ex/beta-1.37-6/sources/1.36.0/gh/letaron/tacron"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/letaron/tacron'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/letaron/tacron" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/letaron/tacron"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/letaron/tacron'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 527dbf5554bd6347eea9ed2e8c9b9bfc09c53317
[INFO] sha for GitHub repo letaron/tacron: 527dbf5554bd6347eea9ed2e8c9b9bfc09c53317
[INFO] validating manifest of letaron/tacron on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of letaron/tacron on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing letaron/tacron
[INFO] finished frobbing letaron/tacron
[INFO] frobbed toml for letaron/tacron written to work/ex/beta-1.37-6/sources/1.36.0/gh/letaron/tacron/Cargo.toml
[INFO] started frobbing letaron/tacron
[INFO] finished frobbing letaron/tacron
[INFO] frobbed toml for letaron/tacron written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/letaron/tacron/Cargo.toml
[INFO] crate letaron/tacron already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing letaron/tacron against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/letaron/tacron:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] a44dc51649a48d12b64120d717c2d820cac6801c92c1a59b320438cf61975fd4
[INFO] running `"docker" "start" "-a" "a44dc51649a48d12b64120d717c2d820cac6801c92c1a59b320438cf61975fd4"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling yaml-rust v0.4.3
[INFO] [stderr]    Compiling nom v4.2.2
[INFO] [stderr]    Compiling serde-hjson v0.8.2
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling config v0.9.2
[INFO] [stderr]    Compiling tacron v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.99s
[INFO] running `"docker" "inspect" "a44dc51649a48d12b64120d717c2d820cac6801c92c1a59b320438cf61975fd4"`
[INFO] running `"docker" "rm" "-f" "a44dc51649a48d12b64120d717c2d820cac6801c92c1a59b320438cf61975fd4"`
[INFO] [stdout] a44dc51649a48d12b64120d717c2d820cac6801c92c1a59b320438cf61975fd4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/letaron/tacron:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4ccda54812c632d918278518df4f022604082da1dcf8d42ffe32bb0444f9022e
[INFO] running `"docker" "start" "-a" "4ccda54812c632d918278518df4f022604082da1dcf8d42ffe32bb0444f9022e"`
[INFO] [stderr]    Compiling tacron v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_err` that must be used
[INFO] [stderr]   --> src/time_units/days_of_week.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |         DaysOfWeek::value_from_name("foo").is_err();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_err` that must be used
[INFO] [stderr]   --> src/time_units/months.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         Months::value_from_name("foo").is_err();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.40s
[INFO] running `"docker" "inspect" "4ccda54812c632d918278518df4f022604082da1dcf8d42ffe32bb0444f9022e"`
[INFO] running `"docker" "rm" "-f" "4ccda54812c632d918278518df4f022604082da1dcf8d42ffe32bb0444f9022e"`
[INFO] [stdout] 4ccda54812c632d918278518df4f022604082da1dcf8d42ffe32bb0444f9022e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/letaron/tacron:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 4a9cdcc9b5af9ce46a19367333fa69332c96bab2f6e9246056e1d7aa7e8cf044
[INFO] running `"docker" "start" "-a" "4a9cdcc9b5af9ce46a19367333fa69332c96bab2f6e9246056e1d7aa7e8cf044"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tacron-fbfd900673a139f6
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test reader::tests::there_is_readers_for_crontabs ... ok
[INFO] [stdout] test reader::tests::there_is_no_readers ... ok
[INFO] [stdout] test reader::crontab_reader::tests::it_reads ... ok
[INFO] [stdout] test reader::crontab_reader::tests::it_add_crontab_readers ... ok
[INFO] [stdout] test time_units::months::tests::it_has_correct_name_conversion ... ok
[INFO] [stdout] test time_units::hours::tests::it_has_correct_boundaries ... ok
[INFO] [stdout] test time_units::minutes::tests::it_has_correct_boundaries ... ok
[INFO] [stdout] test time_units::months::tests::it_has_correct_boundaries ... ok
[INFO] [stdout] test time_units::days_of_week::tests::it_should_err_when_unknow ... ok
[INFO] [stdout] test time_units::months::tests::it_should_err_when_unknow ... ok
[INFO] [stdout] test time_units::days_of_week::tests::it_has_correct_name_conversion ... ok
[INFO] [stdout] test time_units::days_of_week::tests::it_has_correct_boundaries ... ok
[INFO] [stdout] test time_units::days_of_month::tests::it_has_correct_boundaries ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "4a9cdcc9b5af9ce46a19367333fa69332c96bab2f6e9246056e1d7aa7e8cf044"`
[INFO] running `"docker" "rm" "-f" "4a9cdcc9b5af9ce46a19367333fa69332c96bab2f6e9246056e1d7aa7e8cf044"`
[INFO] [stdout] 4a9cdcc9b5af9ce46a19367333fa69332c96bab2f6e9246056e1d7aa7e8cf044