[INFO] fetching crate byteio 0.2.3...
[INFO] extracting crate byteio 0.2.3 into work/ex/beta-1.37-6/sources/1.36.0/reg/byteio/0.2.3
[INFO] extracting crate byteio 0.2.3 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/byteio/0.2.3
[INFO] validating manifest of byteio-0.2.3 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 byteio-0.2.3 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 byteio-0.2.3
[INFO] finished frobbing byteio-0.2.3
[INFO] frobbed toml for byteio-0.2.3 written to work/ex/beta-1.37-6/sources/1.36.0/reg/byteio/0.2.3/Cargo.toml
[INFO] started frobbing byteio-0.2.3
[INFO] finished frobbing byteio-0.2.3
[INFO] frobbed toml for byteio-0.2.3 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/byteio/0.2.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 byteio-0.2.3 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/byteio/0.2.3:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 7a5494ea3ada094f90804c984e99ea32996673618e1c7baa63e1965cbdc64485
[INFO] running `"docker" "start" "-a" "7a5494ea3ada094f90804c984e99ea32996673618e1c7baa63e1965cbdc64485"`
[INFO] [stderr]    Compiling byteio v0.2.3 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "7a5494ea3ada094f90804c984e99ea32996673618e1c7baa63e1965cbdc64485"`
[INFO] running `"docker" "rm" "-f" "7a5494ea3ada094f90804c984e99ea32996673618e1c7baa63e1965cbdc64485"`
[INFO] [stdout] 7a5494ea3ada094f90804c984e99ea32996673618e1c7baa63e1965cbdc64485
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/byteio/0.2.3:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 48310b8912d1910f9f1191936f0c04ffa8098b19bc961d6dbc4cc9673c024e1e
[INFO] running `"docker" "start" "-a" "48310b8912d1910f9f1191936f0c04ffa8098b19bc961d6dbc4cc9673c024e1e"`
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling quickcheck_macros v0.8.0
[INFO] [stderr]    Compiling quickcheck v0.8.5
[INFO] [stderr]    Compiling byteio v0.2.3 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.31s
[INFO] running `"docker" "inspect" "48310b8912d1910f9f1191936f0c04ffa8098b19bc961d6dbc4cc9673c024e1e"`
[INFO] running `"docker" "rm" "-f" "48310b8912d1910f9f1191936f0c04ffa8098b19bc961d6dbc4cc9673c024e1e"`
[INFO] [stdout] 48310b8912d1910f9f1191936f0c04ffa8098b19bc961d6dbc4cc9673c024e1e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/byteio/0.2.3:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 100d3d333a5c36a4e9f584b3c895a06465f4984fdf52930f9eef4a8427e8c1bb
[INFO] running `"docker" "start" "-a" "100d3d333a5c36a4e9f584b3c895a06465f4984fdf52930f9eef4a8427e8c1bb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/byteio-511af092b3b623d2
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test test::display_error_end_of_stream ... ok
[INFO] [stdout] test test::io_error_from_error_end_of_stream ... ok
[INFO] [stdout] test test::display_error_nonexhaustive ... ok
[INFO] [stdout] test test::io_error_from_error_nonexhaustive ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests byteio
[INFO] [stdout] 
[INFO] [stdout] running 17 tests
[INFO] [stdout] test src/lib.rs - Reader::new (line 881) ... ok
[INFO] [stdout] test src/lib.rs - Error::EndOfStream (line 184) ... ok
[INFO] [stdout] test src/lib.rs - ReadBytesExt (line 385) ... ok
[INFO] [stdout] test src/lib.rs - Reader::into_inner (line 918) ... ok
[INFO] [stdout] test src/lib.rs - ReadBytes (line 268) ... ok
[INFO] [stdout] test src/lib.rs - Reader (line 849) ... ok
[INFO] [stdout] test src/lib.rs - ReadBytes (line 250) ... ok
[INFO] [stdout] test src/lib.rs -  (line 48) ... ok
[INFO] [stdout] test src/lib.rs - Reader::num_bytes_read (line 898) ... ok
[INFO] [stdout] test src/lib.rs - Result (line 138) ... ok
[INFO] [stdout] test src/lib.rs - WriteBytesExt (line 1103) ... ok
[INFO] [stdout] test src/lib.rs - Writer<W>::new (line 1617) ... ok
[INFO] [stdout] test src/lib.rs - Writer<W>::into_inner (line 1652) ... ok
[INFO] [stdout] test src/lib.rs - prelude (line 115) ... ok
[INFO] [stdout] test src/lib.rs - Writer<W>::num_bytes_written (line 1634) ... ok
[INFO] [stdout] test src/lib.rs - WriteBytes (line 992) ... ok
[INFO] [stdout] test src/lib.rs - Writer (line 1581) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 17 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "100d3d333a5c36a4e9f584b3c895a06465f4984fdf52930f9eef4a8427e8c1bb"`
[INFO] running `"docker" "rm" "-f" "100d3d333a5c36a4e9f584b3c895a06465f4984fdf52930f9eef4a8427e8c1bb"`
[INFO] [stdout] 100d3d333a5c36a4e9f584b3c895a06465f4984fdf52930f9eef4a8427e8c1bb