[INFO] updating cached repository RyanBrushett/following-a-rust-tutorial
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/RyanBrushett/following-a-rust-tutorial
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/RyanBrushett/following-a-rust-tutorial" "work/ex/beta-1.38-1/sources/1.37.0/gh/RyanBrushett/following-a-rust-tutorial"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/RyanBrushett/following-a-rust-tutorial'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/RyanBrushett/following-a-rust-tutorial" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/RyanBrushett/following-a-rust-tutorial"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/RyanBrushett/following-a-rust-tutorial'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2355a16d2bab2d1ebe2a579b1ae0ebaa93150ece
[INFO] sha for GitHub repo RyanBrushett/following-a-rust-tutorial: 2355a16d2bab2d1ebe2a579b1ae0ebaa93150ece
[INFO] validating manifest of RyanBrushett/following-a-rust-tutorial 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 RyanBrushett/following-a-rust-tutorial 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 RyanBrushett/following-a-rust-tutorial
[INFO] finished frobbing RyanBrushett/following-a-rust-tutorial
[INFO] frobbed toml for RyanBrushett/following-a-rust-tutorial written to work/ex/beta-1.38-1/sources/1.37.0/gh/RyanBrushett/following-a-rust-tutorial/Cargo.toml
[INFO] started frobbing RyanBrushett/following-a-rust-tutorial
[INFO] finished frobbing RyanBrushett/following-a-rust-tutorial
[INFO] frobbed toml for RyanBrushett/following-a-rust-tutorial written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/RyanBrushett/following-a-rust-tutorial/Cargo.toml
[INFO] crate RyanBrushett/following-a-rust-tutorial 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 RyanBrushett/following-a-rust-tutorial 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-3/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/RyanBrushett/following-a-rust-tutorial:/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] c96ed29619e50ad38e160c381eefea5cf65954ca7d6b081036c78c9fd6b1bdc7
[INFO] running `"docker" "start" "-a" "c96ed29619e50ad38e160c381eefea5cf65954ca7d6b081036c78c9fd6b1bdc7"`
[INFO] [stderr]    Compiling following-a-rust-tutorial v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "c96ed29619e50ad38e160c381eefea5cf65954ca7d6b081036c78c9fd6b1bdc7"`
[INFO] running `"docker" "rm" "-f" "c96ed29619e50ad38e160c381eefea5cf65954ca7d6b081036c78c9fd6b1bdc7"`
[INFO] [stdout] c96ed29619e50ad38e160c381eefea5cf65954ca7d6b081036c78c9fd6b1bdc7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/RyanBrushett/following-a-rust-tutorial:/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] c4852eb418807b33eb63f51ec422c32163f2afc3530c553a12b2b80da457a75b
[INFO] running `"docker" "start" "-a" "c4852eb418807b33eb63f51ec422c32163f2afc3530c553a12b2b80da457a75b"`
[INFO] [stderr]    Compiling following-a-rust-tutorial v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `"docker" "inspect" "c4852eb418807b33eb63f51ec422c32163f2afc3530c553a12b2b80da457a75b"`
[INFO] running `"docker" "rm" "-f" "c4852eb418807b33eb63f51ec422c32163f2afc3530c553a12b2b80da457a75b"`
[INFO] [stdout] c4852eb418807b33eb63f51ec422c32163f2afc3530c553a12b2b80da457a75b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/RyanBrushett/following-a-rust-tutorial:/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] 53b31495ba3a749c0064c95fc3a1790f733412a60e6d7c6a6268ae5ef2fdb3b2
[INFO] running `"docker" "start" "-a" "53b31495ba3a749c0064c95fc3a1790f733412a60e6d7c6a6268ae5ef2fdb3b2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/following_a_rust_tutorial-02101aa957ca24d0
[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" "53b31495ba3a749c0064c95fc3a1790f733412a60e6d7c6a6268ae5ef2fdb3b2"`
[INFO] running `"docker" "rm" "-f" "53b31495ba3a749c0064c95fc3a1790f733412a60e6d7c6a6268ae5ef2fdb3b2"`
[INFO] [stdout] 53b31495ba3a749c0064c95fc3a1790f733412a60e6d7c6a6268ae5ef2fdb3b2