[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-1.38-1/sources/1.37.0/gh/ruiramos/rust-book-exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ruiramos/rust-book-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ruiramos/rust-book-exercises" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ruiramos/rust-book-exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ruiramos/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 ruiramos/rust-book-exercises
[INFO] finished frobbing ruiramos/rust-book-exercises
[INFO] frobbed toml for ruiramos/rust-book-exercises written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "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 ruiramos/rust-book-exercises 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-0/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/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 373694ac44f07a52d9ff43d4ab8372c9772f8466cfe49fcb8f720a28ea31ca8f
[INFO] running `"docker" "start" "-a" "373694ac44f07a52d9ff43d4ab8372c9772f8466cfe49fcb8f720a28ea31ca8f"`
[INFO] [stderr]    Compiling rust-book-exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.40s
[INFO] running `"docker" "inspect" "373694ac44f07a52d9ff43d4ab8372c9772f8466cfe49fcb8f720a28ea31ca8f"`
[INFO] running `"docker" "rm" "-f" "373694ac44f07a52d9ff43d4ab8372c9772f8466cfe49fcb8f720a28ea31ca8f"`
[INFO] [stdout] 373694ac44f07a52d9ff43d4ab8372c9772f8466cfe49fcb8f720a28ea31ca8f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] cbaa055244a2450cb61aaf9fe509ae2130a527685740518a5460749e413aeac1
[INFO] running `"docker" "start" "-a" "cbaa055244a2450cb61aaf9fe509ae2130a527685740518a5460749e413aeac1"`
[INFO] [stderr]    Compiling rust-book-exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.73s
[INFO] running `"docker" "inspect" "cbaa055244a2450cb61aaf9fe509ae2130a527685740518a5460749e413aeac1"`
[INFO] running `"docker" "rm" "-f" "cbaa055244a2450cb61aaf9fe509ae2130a527685740518a5460749e413aeac1"`
[INFO] [stdout] cbaa055244a2450cb61aaf9fe509ae2130a527685740518a5460749e413aeac1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 8034ddee8d29156a1d08afc8d6aebccb1eacdc3481dad9bf855ad1d5506bfb42
[INFO] running `"docker" "start" "-a" "8034ddee8d29156a1d08afc8d6aebccb1eacdc3481dad9bf855ad1d5506bfb42"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ex1-d2a56ff7af0ab714
[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/ex2-2d00fcea134b90e0
[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/ex3-681d39d4301cfc7f
[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-29210e83022c6fa5
[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" "8034ddee8d29156a1d08afc8d6aebccb1eacdc3481dad9bf855ad1d5506bfb42"`
[INFO] running `"docker" "rm" "-f" "8034ddee8d29156a1d08afc8d6aebccb1eacdc3481dad9bf855ad1d5506bfb42"`
[INFO] [stdout] 8034ddee8d29156a1d08afc8d6aebccb1eacdc3481dad9bf855ad1d5506bfb42