[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-1.38-1/sources/1.37.0/gh/yshuman1/rust-book-exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/yshuman1/rust-book-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/yshuman1/rust-book-exercises" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yshuman1/rust-book-exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of yshuman1/rust-book-exercises 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 yshuman1/rust-book-exercises
[INFO] finished frobbing yshuman1/rust-book-exercises
[INFO] frobbed toml for yshuman1/rust-book-exercises written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "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 yshuman1/rust-book-exercises 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] f4fd6a353d57222d6ebab485266c51f1f0a8aa4aede7a35e936b6e375fac6f23
[INFO] running `"docker" "start" "-a" "f4fd6a353d57222d6ebab485266c51f1f0a8aa4aede7a35e936b6e375fac6f23"`
[INFO] [stderr]    Compiling hello_cargo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `"docker" "inspect" "f4fd6a353d57222d6ebab485266c51f1f0a8aa4aede7a35e936b6e375fac6f23"`
[INFO] running `"docker" "rm" "-f" "f4fd6a353d57222d6ebab485266c51f1f0a8aa4aede7a35e936b6e375fac6f23"`
[INFO] [stdout] f4fd6a353d57222d6ebab485266c51f1f0a8aa4aede7a35e936b6e375fac6f23
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] afeb1b4000c929d878571557d4793921a5d8a7938ab9ca0522c7d80db9aa1e81
[INFO] running `"docker" "start" "-a" "afeb1b4000c929d878571557d4793921a5d8a7938ab9ca0522c7d80db9aa1e81"`
[INFO] [stderr]    Compiling hello_cargo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `"docker" "inspect" "afeb1b4000c929d878571557d4793921a5d8a7938ab9ca0522c7d80db9aa1e81"`
[INFO] running `"docker" "rm" "-f" "afeb1b4000c929d878571557d4793921a5d8a7938ab9ca0522c7d80db9aa1e81"`
[INFO] [stdout] afeb1b4000c929d878571557d4793921a5d8a7938ab9ca0522c7d80db9aa1e81
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] b5b5d6271730ebd3b7baf808dca2ac3c6955777acefcf637849c2073bd3f6744
[INFO] running `"docker" "start" "-a" "b5b5d6271730ebd3b7baf808dca2ac3c6955777acefcf637849c2073bd3f6744"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello_cargo-03084a90e557edb8
[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" "b5b5d6271730ebd3b7baf808dca2ac3c6955777acefcf637849c2073bd3f6744"`
[INFO] running `"docker" "rm" "-f" "b5b5d6271730ebd3b7baf808dca2ac3c6955777acefcf637849c2073bd3f6744"`
[INFO] [stdout] b5b5d6271730ebd3b7baf808dca2ac3c6955777acefcf637849c2073bd3f6744