[INFO] crate rollbuf 0.1.0 is already in cache
[INFO] extracting crate rollbuf 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/rollbuf/0.1.0
[INFO] extracting crate rollbuf 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rollbuf/0.1.0
[INFO] validating manifest of rollbuf-0.1.0 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 rollbuf-0.1.0 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 rollbuf-0.1.0
[INFO] finished frobbing rollbuf-0.1.0
[INFO] frobbed toml for rollbuf-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rollbuf/0.1.0/Cargo.toml
[INFO] started frobbing rollbuf-0.1.0
[INFO] finished frobbing rollbuf-0.1.0
[INFO] frobbed toml for rollbuf-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rollbuf/0.1.0/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] 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 rollbuf-0.1.0 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-1/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/rollbuf/0.1.0:/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] 0de5e907cae5451d4b4d320b35a5cf92ba7bcd2ab48376e526976ae1668b4a94
[INFO] running `"docker" "start" "-a" "0de5e907cae5451d4b4d320b35a5cf92ba7bcd2ab48376e526976ae1668b4a94"`
[INFO] [stderr]    Compiling rollbuf v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:45:52
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn fill_buf(&mut self) -> Result<bool, Box<Error>> {
[INFO] [stderr]    |                                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `"docker" "inspect" "0de5e907cae5451d4b4d320b35a5cf92ba7bcd2ab48376e526976ae1668b4a94"`
[INFO] running `"docker" "rm" "-f" "0de5e907cae5451d4b4d320b35a5cf92ba7bcd2ab48376e526976ae1668b4a94"`
[INFO] [stdout] 0de5e907cae5451d4b4d320b35a5cf92ba7bcd2ab48376e526976ae1668b4a94
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/rollbuf/0.1.0:/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] 9b900cd5beaa52487b7ebc4f189b9d7ba4bde91e2d83e1f9ce3181f24bb397ff
[INFO] running `"docker" "start" "-a" "9b900cd5beaa52487b7ebc4f189b9d7ba4bde91e2d83e1f9ce3181f24bb397ff"`
[INFO] [stderr]    Compiling rollbuf v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:45:52
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn fill_buf(&mut self) -> Result<bool, Box<Error>> {
[INFO] [stderr]    |                                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `"docker" "inspect" "9b900cd5beaa52487b7ebc4f189b9d7ba4bde91e2d83e1f9ce3181f24bb397ff"`
[INFO] running `"docker" "rm" "-f" "9b900cd5beaa52487b7ebc4f189b9d7ba4bde91e2d83e1f9ce3181f24bb397ff"`
[INFO] [stdout] 9b900cd5beaa52487b7ebc4f189b9d7ba4bde91e2d83e1f9ce3181f24bb397ff
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/rollbuf/0.1.0:/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] 56d33d4d3ab1ba50614cf7c6cd6904f04aa4f13a98c2a37ca3631fceaba75f77
[INFO] running `"docker" "start" "-a" "56d33d4d3ab1ba50614cf7c6cd6904f04aa4f13a98c2a37ca3631fceaba75f77"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rollbuf-b68812e3e4a8d050
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::test_rollbuf_extend ... ok
[INFO] [stdout] test tests::test_rollbuf_no_extend ... ok
[INFO] [stderr]    Doc-tests rollbuf
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 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" "56d33d4d3ab1ba50614cf7c6cd6904f04aa4f13a98c2a37ca3631fceaba75f77"`
[INFO] running `"docker" "rm" "-f" "56d33d4d3ab1ba50614cf7c6cd6904f04aa4f13a98c2a37ca3631fceaba75f77"`
[INFO] [stdout] 56d33d4d3ab1ba50614cf7c6cd6904f04aa4f13a98c2a37ca3631fceaba75f77