[INFO] fetching crate futures-io-preview 0.3.0-alpha.17...
[INFO] extracting crate futures-io-preview 0.3.0-alpha.17 into work/ex/beta-1.37-6/sources/1.36.0/reg/futures-io-preview/0.3.0-alpha.17
[INFO] extracting crate futures-io-preview 0.3.0-alpha.17 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/futures-io-preview/0.3.0-alpha.17
[INFO] validating manifest of futures-io-preview-0.3.0-alpha.17 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 futures-io-preview-0.3.0-alpha.17 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 futures-io-preview-0.3.0-alpha.17
[INFO] finished frobbing futures-io-preview-0.3.0-alpha.17
[INFO] frobbed toml for futures-io-preview-0.3.0-alpha.17 written to work/ex/beta-1.37-6/sources/1.36.0/reg/futures-io-preview/0.3.0-alpha.17/Cargo.toml
[INFO] started frobbing futures-io-preview-0.3.0-alpha.17
[INFO] finished frobbing futures-io-preview-0.3.0-alpha.17
[INFO] frobbed toml for futures-io-preview-0.3.0-alpha.17 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/futures-io-preview/0.3.0-alpha.17/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 futures-io-preview-0.3.0-alpha.17 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-6/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/futures-io-preview/0.3.0-alpha.17:/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] 733bc4e4b925383356581d40585f0ab14ac4bc96835b5ced71f96db422467399
[INFO] running `"docker" "start" "-a" "733bc4e4b925383356581d40585f0ab14ac4bc96835b5ced71f96db422467399"`
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.17 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `"docker" "inspect" "733bc4e4b925383356581d40585f0ab14ac4bc96835b5ced71f96db422467399"`
[INFO] running `"docker" "rm" "-f" "733bc4e4b925383356581d40585f0ab14ac4bc96835b5ced71f96db422467399"`
[INFO] [stdout] 733bc4e4b925383356581d40585f0ab14ac4bc96835b5ced71f96db422467399
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/futures-io-preview/0.3.0-alpha.17:/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] 2d5b25a105b3615fce931f3a9d36f533dd50ec8fc41fc159e447abb81257c1bb
[INFO] running `"docker" "start" "-a" "2d5b25a105b3615fce931f3a9d36f533dd50ec8fc41fc159e447abb81257c1bb"`
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.17 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "2d5b25a105b3615fce931f3a9d36f533dd50ec8fc41fc159e447abb81257c1bb"`
[INFO] running `"docker" "rm" "-f" "2d5b25a105b3615fce931f3a9d36f533dd50ec8fc41fc159e447abb81257c1bb"`
[INFO] [stdout] 2d5b25a105b3615fce931f3a9d36f533dd50ec8fc41fc159e447abb81257c1bb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/futures-io-preview/0.3.0-alpha.17:/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] 7203cd10b7a050a6668c19a10430737a723ada611873254ca642c9896d138f8f
[INFO] running `"docker" "start" "-a" "7203cd10b7a050a6668c19a10430737a723ada611873254ca642c9896d138f8f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/futures_io-823deef6614e154f
[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] [stderr]    Doc-tests futures_io
[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" "7203cd10b7a050a6668c19a10430737a723ada611873254ca642c9896d138f8f"`
[INFO] running `"docker" "rm" "-f" "7203cd10b7a050a6668c19a10430737a723ada611873254ca642c9896d138f8f"`
[INFO] [stdout] 7203cd10b7a050a6668c19a10430737a723ada611873254ca642c9896d138f8f