[INFO] updating cached repository yshuman1/rust-book-exercises
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/yshuman1/rust-book-exercises
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/yshuman1/rust-book-exercises" "work/ex/beta-1.37-6/sources/1.36.0/gh/yshuman1/rust-book-exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/yshuman1/rust-book-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/yshuman1/rust-book-exercises" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/yshuman1/rust-book-exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/yshuman1/rust-book-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c6fbd66c89e51e1d87137833070bb8c0181c917c
[INFO] sha for GitHub repo yshuman1/rust-book-exercises: c6fbd66c89e51e1d87137833070bb8c0181c917c
[INFO] validating manifest of yshuman1/rust-book-exercises on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of yshuman1/rust-book-exercises on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing yshuman1/rust-book-exercises
[INFO] finished frobbing yshuman1/rust-book-exercises
[INFO] frobbed toml for yshuman1/rust-book-exercises written to work/ex/beta-1.37-6/sources/1.36.0/gh/yshuman1/rust-book-exercises/Cargo.toml
[INFO] started frobbing yshuman1/rust-book-exercises
[INFO] finished frobbing yshuman1/rust-book-exercises
[INFO] frobbed toml for yshuman1/rust-book-exercises written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/yshuman1/rust-book-exercises/Cargo.toml
[INFO] crate yshuman1/rust-book-exercises already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing yshuman1/rust-book-exercises against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/yshuman1/rust-book-exercises:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] e662f372483bb3b809a4e2a69c8bdb0135ace9e04f862ebba0872afba36e9c64
[INFO] running `"docker" "start" "-a" "e662f372483bb3b809a4e2a69c8bdb0135ace9e04f862ebba0872afba36e9c64"`
[INFO] [stderr]    Compiling hello_cargo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `"docker" "inspect" "e662f372483bb3b809a4e2a69c8bdb0135ace9e04f862ebba0872afba36e9c64"`
[INFO] running `"docker" "rm" "-f" "e662f372483bb3b809a4e2a69c8bdb0135ace9e04f862ebba0872afba36e9c64"`
[INFO] [stdout] e662f372483bb3b809a4e2a69c8bdb0135ace9e04f862ebba0872afba36e9c64
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/yshuman1/rust-book-exercises:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 69680216d75012d9387fca5e4bf0e9f6406f68e6be7d41999a061a86a0829f89
[INFO] running `"docker" "start" "-a" "69680216d75012d9387fca5e4bf0e9f6406f68e6be7d41999a061a86a0829f89"`
[INFO] [stderr]    Compiling hello_cargo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `"docker" "inspect" "69680216d75012d9387fca5e4bf0e9f6406f68e6be7d41999a061a86a0829f89"`
[INFO] running `"docker" "rm" "-f" "69680216d75012d9387fca5e4bf0e9f6406f68e6be7d41999a061a86a0829f89"`
[INFO] [stdout] 69680216d75012d9387fca5e4bf0e9f6406f68e6be7d41999a061a86a0829f89
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/yshuman1/rust-book-exercises:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] ea56748a873a8e88e94549253813ef896b8d5da5559dc7c9d6714c6d37d44a79
[INFO] running `"docker" "start" "-a" "ea56748a873a8e88e94549253813ef896b8d5da5559dc7c9d6714c6d37d44a79"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello_cargo-73bf7ef8f07c6a3a
[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" "ea56748a873a8e88e94549253813ef896b8d5da5559dc7c9d6714c6d37d44a79"`
[INFO] running `"docker" "rm" "-f" "ea56748a873a8e88e94549253813ef896b8d5da5559dc7c9d6714c6d37d44a79"`
[INFO] [stdout] ea56748a873a8e88e94549253813ef896b8d5da5559dc7c9d6714c6d37d44a79