[INFO] updating cached repository ruiramos/rust-book-exercises
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ruiramos/rust-book-exercises
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ruiramos/rust-book-exercises" "work/ex/beta-1.37-6/sources/1.36.0/gh/ruiramos/rust-book-exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/ruiramos/rust-book-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ruiramos/rust-book-exercises" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ruiramos/rust-book-exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ruiramos/rust-book-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] dbe8092108e6e0e73d42620714b15de4e7496922
[INFO] sha for GitHub repo ruiramos/rust-book-exercises: dbe8092108e6e0e73d42620714b15de4e7496922
[INFO] validating manifest of ruiramos/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 ruiramos/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 ruiramos/rust-book-exercises
[INFO] finished frobbing ruiramos/rust-book-exercises
[INFO] frobbed toml for ruiramos/rust-book-exercises written to work/ex/beta-1.37-6/sources/1.36.0/gh/ruiramos/rust-book-exercises/Cargo.toml
[INFO] started frobbing ruiramos/rust-book-exercises
[INFO] finished frobbing ruiramos/rust-book-exercises
[INFO] frobbed toml for ruiramos/rust-book-exercises written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ruiramos/rust-book-exercises/Cargo.toml
[INFO] crate ruiramos/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 ruiramos/rust-book-exercises against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ruiramos/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 6479939d12ce255f2ae27fbd221232315ed604668457e07649686b824d9ee7fb
[INFO] running `"docker" "start" "-a" "6479939d12ce255f2ae27fbd221232315ed604668457e07649686b824d9ee7fb"`
[INFO] [stderr]    Compiling rust-book-exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.72s
[INFO] running `"docker" "inspect" "6479939d12ce255f2ae27fbd221232315ed604668457e07649686b824d9ee7fb"`
[INFO] running `"docker" "rm" "-f" "6479939d12ce255f2ae27fbd221232315ed604668457e07649686b824d9ee7fb"`
[INFO] [stdout] 6479939d12ce255f2ae27fbd221232315ed604668457e07649686b824d9ee7fb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ruiramos/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 8f31449d77a35b4d95d262e792d32eae1d50e5a242c24311dfc00cf1e4937c4d
[INFO] running `"docker" "start" "-a" "8f31449d77a35b4d95d262e792d32eae1d50e5a242c24311dfc00cf1e4937c4d"`
[INFO] [stderr]    Compiling rust-book-exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.89s
[INFO] running `"docker" "inspect" "8f31449d77a35b4d95d262e792d32eae1d50e5a242c24311dfc00cf1e4937c4d"`
[INFO] running `"docker" "rm" "-f" "8f31449d77a35b4d95d262e792d32eae1d50e5a242c24311dfc00cf1e4937c4d"`
[INFO] [stdout] 8f31449d77a35b4d95d262e792d32eae1d50e5a242c24311dfc00cf1e4937c4d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ruiramos/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 6b1a9846c5635ff84dbeb50d4a4f40c1c97d0e9f432858ca5ef922d09c51dfcd
[INFO] running `"docker" "start" "-a" "6b1a9846c5635ff84dbeb50d4a4f40c1c97d0e9f432858ca5ef922d09c51dfcd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ex1-bc070d2cc489606a
[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] [stderr]      Running /opt/crater/target/debug/deps/ex2-c9653172c2f1fc14
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ex3-4d164bdd6325bd44
[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] [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] [stderr]      Running /opt/crater/target/debug/deps/main-6e90c5af44e3bc18
[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" "6b1a9846c5635ff84dbeb50d4a4f40c1c97d0e9f432858ca5ef922d09c51dfcd"`
[INFO] running `"docker" "rm" "-f" "6b1a9846c5635ff84dbeb50d4a4f40c1c97d0e9f432858ca5ef922d09c51dfcd"`
[INFO] [stdout] 6b1a9846c5635ff84dbeb50d4a4f40c1c97d0e9f432858ca5ef922d09c51dfcd