[INFO] crate io-at 0.4.1 is already in cache
[INFO] extracting crate io-at 0.4.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/io-at/0.4.1
[INFO] extracting crate io-at 0.4.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/io-at/0.4.1
[INFO] validating manifest of io-at-0.4.1 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 io-at-0.4.1 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 io-at-0.4.1
[INFO] finished frobbing io-at-0.4.1
[INFO] frobbed toml for io-at-0.4.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/io-at/0.4.1/Cargo.toml
[INFO] started frobbing io-at-0.4.1
[INFO] finished frobbing io-at-0.4.1
[INFO] frobbed toml for io-at-0.4.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/io-at/0.4.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 io-at-0.4.1 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/io-at/0.4.1:/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] 0023d69b86de5c9ae76c9e5f7a086cec3a1b22d982d9fc2d65d8c7a83073de1d
[INFO] running `"docker" "start" "-a" "0023d69b86de5c9ae76c9e5f7a086cec3a1b22d982d9fc2d65d8c7a83073de1d"`
[INFO] [stderr]    Compiling io-at v0.4.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `"docker" "inspect" "0023d69b86de5c9ae76c9e5f7a086cec3a1b22d982d9fc2d65d8c7a83073de1d"`
[INFO] running `"docker" "rm" "-f" "0023d69b86de5c9ae76c9e5f7a086cec3a1b22d982d9fc2d65d8c7a83073de1d"`
[INFO] [stdout] 0023d69b86de5c9ae76c9e5f7a086cec3a1b22d982d9fc2d65d8c7a83073de1d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/io-at/0.4.1:/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] 36c930ad4a2171dc19ce8583a24787ccbe202ea6798e936d46f8f4fcb5203b1c
[INFO] running `"docker" "start" "-a" "36c930ad4a2171dc19ce8583a24787ccbe202ea6798e936d46f8f4fcb5203b1c"`
[INFO] [stderr]    Compiling io-at v0.4.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `"docker" "inspect" "36c930ad4a2171dc19ce8583a24787ccbe202ea6798e936d46f8f4fcb5203b1c"`
[INFO] running `"docker" "rm" "-f" "36c930ad4a2171dc19ce8583a24787ccbe202ea6798e936d46f8f4fcb5203b1c"`
[INFO] [stdout] 36c930ad4a2171dc19ce8583a24787ccbe202ea6798e936d46f8f4fcb5203b1c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/io-at/0.4.1:/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] 199c6971878a7d4e4d367a765705b466fb8c111d1fc61c1a315b892961560c9e
[INFO] running `"docker" "start" "-a" "199c6971878a7d4e4d367a765705b466fb8c111d1fc61c1a315b892961560c9e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/io_at-f98eb153094860d6
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test at_test_impl ... ok
[INFO] [stdout] test do_t_block_limit ... ok
[INFO] [stdout] test do_t_cursor ... ok
[INFO] [stdout] test slice::do_t ... ok
[INFO] [stdout] test os::file::test::base ... ok
[INFO] [stdout] test os::raw::do_t ... ok
[INFO] [stdout] test os::file::test::ref_ ... ok
[INFO] [stdout] test take_test_impl ... ok
[INFO] [stdout] test take_test_specifics ... ok
[INFO] [stdout] test do_t_locked_seek ... ok
[INFO] [stdout] test vec::do_t ... ok
[INFO] [stdout] test vec::ref_vec ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/custom_ref-79568791ae659294
[INFO] [stderr]    Doc-tests io-at
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "199c6971878a7d4e4d367a765705b466fb8c111d1fc61c1a315b892961560c9e"`
[INFO] running `"docker" "rm" "-f" "199c6971878a7d4e4d367a765705b466fb8c111d1fc61c1a315b892961560c9e"`
[INFO] [stdout] 199c6971878a7d4e4d367a765705b466fb8c111d1fc61c1a315b892961560c9e