[INFO] crate ringtail 0.3.0 is already in cache
[INFO] extracting crate ringtail 0.3.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/ringtail/0.3.0
[INFO] extracting crate ringtail 0.3.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/ringtail/0.3.0
[INFO] validating manifest of ringtail-0.3.0 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 ringtail-0.3.0 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 ringtail-0.3.0
[INFO] finished frobbing ringtail-0.3.0
[INFO] frobbed toml for ringtail-0.3.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/ringtail/0.3.0/Cargo.toml
[INFO] started frobbing ringtail-0.3.0
[INFO] finished frobbing ringtail-0.3.0
[INFO] frobbed toml for ringtail-0.3.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/ringtail/0.3.0/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ringtail-0.3.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/ringtail/0.3.0:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] d2c1a35f3b799975dfe410c92ae55a86a1fb16435779d10527a46b64dc3b40fd
[INFO] running `"docker" "start" "-a" "d2c1a35f3b799975dfe410c92ae55a86a1fb16435779d10527a46b64dc3b40fd"`
[INFO] [stderr]    Compiling ringtail v0.3.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `"docker" "inspect" "d2c1a35f3b799975dfe410c92ae55a86a1fb16435779d10527a46b64dc3b40fd"`
[INFO] running `"docker" "rm" "-f" "d2c1a35f3b799975dfe410c92ae55a86a1fb16435779d10527a46b64dc3b40fd"`
[INFO] [stdout] d2c1a35f3b799975dfe410c92ae55a86a1fb16435779d10527a46b64dc3b40fd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/ringtail/0.3.0:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] bd67f0d57c4c92530513dc53a0386b5e0614a7a09bd120a29b1ccfa482c0cce9
[INFO] running `"docker" "start" "-a" "bd67f0d57c4c92530513dc53a0386b5e0614a7a09bd120a29b1ccfa482c0cce9"`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling bstr v0.2.7
[INFO] [stderr]    Compiling csv-core v0.1.6
[INFO] [stderr]    Compiling csv v1.1.1
[INFO] [stderr]    Compiling criterion v0.2.11
[INFO] [stderr]    Compiling ringtail v0.3.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.06s
[INFO] running `"docker" "inspect" "bd67f0d57c4c92530513dc53a0386b5e0614a7a09bd120a29b1ccfa482c0cce9"`
[INFO] running `"docker" "rm" "-f" "bd67f0d57c4c92530513dc53a0386b5e0614a7a09bd120a29b1ccfa482c0cce9"`
[INFO] [stdout] bd67f0d57c4c92530513dc53a0386b5e0614a7a09bd120a29b1ccfa482c0cce9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/ringtail/0.3.0:/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] e59e3cd2922c07dbd031111b3c767b57edf9934962dd3a46ce89f0df37eedbac
[INFO] running `"docker" "start" "-a" "e59e3cd2922c07dbd031111b3c767b57edf9934962dd3a46ce89f0df37eedbac"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ringtail-63a74d7303c39e68
[INFO] [stdout] 
[INFO] [stdout] running 24 tests
[INFO] [stdout] test buffers::unbounded::tests::test_capacity ... ok
[INFO] [stdout] test buffers::atomic::tests::test_push_more_than_buffer ... ok
[INFO] [stdout] test buffers::atomic::tests::test_push_capacity ... ok
[INFO] [stdout] test buffers::atomic::tests::test_push ... ok
[INFO] [stdout] test buffers::unbounded::tests::test_pull_more_than_buffer ... ok
[INFO] [stdout] test buffers::atomic::tests::test_pull_more_than_buffer ... ok
[INFO] [stdout] test buffers::unbounded::tests::test_push ... ok
[INFO] [stdout] test buffers::unbounded::tests::test_push_a_lot ... ok
[INFO] [stdout] test buffers::unbounded::tests::test_push_and_consume ... ok
[INFO] [stdout] test internal::arrays::tests::copy_from_seq_with_less_elements ... ok
[INFO] [stdout] test buffers::atomic::tests::test_pull_less_than_buffer ... ok
[INFO] [stdout] test internal::arrays::tests::copy_from_seq_with_more_elements ... ok
[INFO] [stdout] test internal::arrays::tests::copy_to_seq_with_less_elements ... ok
[INFO] [stdout] test buffers::unbounded::tests::test_force_resize ... ok
[INFO] [stdout] test buffers::unbounded::tests::test_pull_less_than_buffer ... ok
[INFO] [stdout] test buffers::atomic::tests::test_push_and_consume ... ok
[INFO] [stdout] test internal::arrays::tests::copy_to_seq_with_more_elements ... ok
[INFO] [stdout] test io::tests::read_from_closed_pipe_returns_zero ... ok
[INFO] [stdout] test io::tests::read_nonblocking ... ok
[INFO] [stdout] test buffers::atomic::tests::test_capacity ... ok
[INFO] [stdout] test io::tests::read_write ... ok
[INFO] [stdout] test io::tests::write_nonblocking ... ok
[INFO] [stdout] test io::tests::write_to_closed_pipe_returns_broken_pipe ... ok
[INFO] [stdout] test io::tests::read_empty_blocking ... ok
[INFO] [stderr]    Doc-tests ringtail
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 24 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" "e59e3cd2922c07dbd031111b3c767b57edf9934962dd3a46ce89f0df37eedbac"`
[INFO] running `"docker" "rm" "-f" "e59e3cd2922c07dbd031111b3c767b57edf9934962dd3a46ce89f0df37eedbac"`
[INFO] [stdout] e59e3cd2922c07dbd031111b3c767b57edf9934962dd3a46ce89f0df37eedbac