[INFO] updating cached repository robertohuertasm/rust-a-gentle-introduction
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/robertohuertasm/rust-a-gentle-introduction
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/robertohuertasm/rust-a-gentle-introduction" "work/ex/beta-1.38-1/sources/1.37.0/gh/robertohuertasm/rust-a-gentle-introduction"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/robertohuertasm/rust-a-gentle-introduction'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/robertohuertasm/rust-a-gentle-introduction" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/robertohuertasm/rust-a-gentle-introduction"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/robertohuertasm/rust-a-gentle-introduction'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7e36dbf2139c284f68e110fefd1edc88dec8e3ab
[INFO] sha for GitHub repo robertohuertasm/rust-a-gentle-introduction: 7e36dbf2139c284f68e110fefd1edc88dec8e3ab
[INFO] validating manifest of robertohuertasm/rust-a-gentle-introduction 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 robertohuertasm/rust-a-gentle-introduction 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 robertohuertasm/rust-a-gentle-introduction
[INFO] finished frobbing robertohuertasm/rust-a-gentle-introduction
[INFO] frobbed toml for robertohuertasm/rust-a-gentle-introduction written to work/ex/beta-1.38-1/sources/1.37.0/gh/robertohuertasm/rust-a-gentle-introduction/Cargo.toml
[INFO] started frobbing robertohuertasm/rust-a-gentle-introduction
[INFO] finished frobbing robertohuertasm/rust-a-gentle-introduction
[INFO] frobbed toml for robertohuertasm/rust-a-gentle-introduction written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/robertohuertasm/rust-a-gentle-introduction/Cargo.toml
[INFO] crate robertohuertasm/rust-a-gentle-introduction 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 robertohuertasm/rust-a-gentle-introduction 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/robertohuertasm/rust-a-gentle-introduction:/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] f6d701b43410b17b4cfc9b0a05e29a1b1d4353f1310eb2a00162ae084aae6487
[INFO] running `"docker" "start" "-a" "f6d701b43410b17b4cfc9b0a05e29a1b1d4353f1310eb2a00162ae084aae6487"`
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling gentle_intro v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.80s
[INFO] running `"docker" "inspect" "f6d701b43410b17b4cfc9b0a05e29a1b1d4353f1310eb2a00162ae084aae6487"`
[INFO] running `"docker" "rm" "-f" "f6d701b43410b17b4cfc9b0a05e29a1b1d4353f1310eb2a00162ae084aae6487"`
[INFO] [stdout] f6d701b43410b17b4cfc9b0a05e29a1b1d4353f1310eb2a00162ae084aae6487
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/robertohuertasm/rust-a-gentle-introduction:/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] 8519af9d94bba39af11646b8aa193cc7494ddfe5334f4c8dc4e53a50cb2aa971
[INFO] running `"docker" "start" "-a" "8519af9d94bba39af11646b8aa193cc7494ddfe5334f4c8dc4e53a50cb2aa971"`
[INFO] [stderr]    Compiling gentle_intro v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `"docker" "inspect" "8519af9d94bba39af11646b8aa193cc7494ddfe5334f4c8dc4e53a50cb2aa971"`
[INFO] running `"docker" "rm" "-f" "8519af9d94bba39af11646b8aa193cc7494ddfe5334f4c8dc4e53a50cb2aa971"`
[INFO] [stdout] 8519af9d94bba39af11646b8aa193cc7494ddfe5334f4c8dc4e53a50cb2aa971
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/robertohuertasm/rust-a-gentle-introduction:/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] b56901c1d3ee1ab219bf0134d7cf288567caccfe1f5601385445421d43e0f3bb
[INFO] running `"docker" "start" "-a" "b56901c1d3ee1ab219bf0134d7cf288567caccfe1f5601385445421d43e0f3bb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/gentle_intro-9974400ad6d4c418
[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" "b56901c1d3ee1ab219bf0134d7cf288567caccfe1f5601385445421d43e0f3bb"`
[INFO] running `"docker" "rm" "-f" "b56901c1d3ee1ab219bf0134d7cf288567caccfe1f5601385445421d43e0f3bb"`
[INFO] [stdout] b56901c1d3ee1ab219bf0134d7cf288567caccfe1f5601385445421d43e0f3bb