[INFO] updating cached repository just-cli/just-core
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/just-cli/just-core
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/just-cli/just-core" "work/ex/beta-1.38-1/sources/1.37.0/gh/just-cli/just-core"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/just-cli/just-core'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/just-cli/just-core" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/just-cli/just-core"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/just-cli/just-core'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ddf9fedf678e87106370c0a56e313c5e22ec7245
[INFO] sha for GitHub repo just-cli/just-core: ddf9fedf678e87106370c0a56e313c5e22ec7245
[INFO] validating manifest of just-cli/just-core 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 just-cli/just-core 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 just-cli/just-core
[INFO] finished frobbing just-cli/just-core
[INFO] frobbed toml for just-cli/just-core written to work/ex/beta-1.38-1/sources/1.37.0/gh/just-cli/just-core/Cargo.toml
[INFO] started frobbing just-cli/just-core
[INFO] finished frobbing just-cli/just-core
[INFO] frobbed toml for just-cli/just-core written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/just-cli/just-core/Cargo.toml
[INFO] crate just-cli/just-core already has a lockfile, it will not be regenerated
[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 just-cli/just-core 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-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/just-cli/just-core:/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] 13803d509c0e8f783540e41b506da19e09eb1a71fff3e84ff957ba84d8e295b3
[INFO] running `"docker" "start" "-a" "13803d509c0e8f783540e41b506da19e09eb1a71fff3e84ff957ba84d8e295b3"`
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]    Compiling serde_derive v1.0.84
[INFO] [stderr]    Compiling just-core v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/result.rs:5:49
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub type BoxedResult<T> = result::Result<T, Box<error::Error>>;
[INFO] [stderr]   |                                                 ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/result.rs:31:32
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.38s
[INFO] running `"docker" "inspect" "13803d509c0e8f783540e41b506da19e09eb1a71fff3e84ff957ba84d8e295b3"`
[INFO] running `"docker" "rm" "-f" "13803d509c0e8f783540e41b506da19e09eb1a71fff3e84ff957ba84d8e295b3"`
[INFO] [stdout] 13803d509c0e8f783540e41b506da19e09eb1a71fff3e84ff957ba84d8e295b3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/just-cli/just-core:/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] 2d890433fd9804fc33a334d71cb4244446ba83d358979cd241a8df68e654fc73
[INFO] running `"docker" "start" "-a" "2d890433fd9804fc33a334d71cb4244446ba83d358979cd241a8df68e654fc73"`
[INFO] [stderr]    Compiling just-core v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/result.rs:5:49
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub type BoxedResult<T> = result::Result<T, Box<error::Error>>;
[INFO] [stderr]   |                                                 ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/result.rs:31:32
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.20s
[INFO] running `"docker" "inspect" "2d890433fd9804fc33a334d71cb4244446ba83d358979cd241a8df68e654fc73"`
[INFO] running `"docker" "rm" "-f" "2d890433fd9804fc33a334d71cb4244446ba83d358979cd241a8df68e654fc73"`
[INFO] [stdout] 2d890433fd9804fc33a334d71cb4244446ba83d358979cd241a8df68e654fc73
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/just-cli/just-core:/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] 4bd34961ae603d8275f2d6ee408f6e86aa748d35c0be2929b1952fa4f7cc9bd3
[INFO] running `"docker" "start" "-a" "4bd34961ae603d8275f2d6ee408f6e86aa748d35c0be2929b1952fa4f7cc9bd3"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/just_core-3845bbbd19e4ed73
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test system::tests::cmd_parse_empty ... ok
[INFO] [stdout] test system::tests::cmd_parse_with_argument ... ok
[INFO] [stdout] test system::tests::cmd_parse_without_argument ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests just-core
[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" "4bd34961ae603d8275f2d6ee408f6e86aa748d35c0be2929b1952fa4f7cc9bd3"`
[INFO] running `"docker" "rm" "-f" "4bd34961ae603d8275f2d6ee408f6e86aa748d35c0be2929b1952fa4f7cc9bd3"`
[INFO] [stdout] 4bd34961ae603d8275f2d6ee408f6e86aa748d35c0be2929b1952fa4f7cc9bd3