[INFO] updating cached repository elycruz/rust-book
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/elycruz/rust-book
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/elycruz/rust-book" "work/ex/beta-1.37-6/sources/1.36.0/gh/elycruz/rust-book"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/elycruz/rust-book'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/elycruz/rust-book" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/elycruz/rust-book"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/elycruz/rust-book'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cd9266b6c61f2b69f353735e61512e1d19bc9fb5
[INFO] sha for GitHub repo elycruz/rust-book: cd9266b6c61f2b69f353735e61512e1d19bc9fb5
[INFO] validating manifest of elycruz/rust-book 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 elycruz/rust-book 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 elycruz/rust-book
[INFO] finished frobbing elycruz/rust-book
[INFO] frobbed toml for elycruz/rust-book written to work/ex/beta-1.37-6/sources/1.36.0/gh/elycruz/rust-book/Cargo.toml
[INFO] started frobbing elycruz/rust-book
[INFO] finished frobbing elycruz/rust-book
[INFO] frobbed toml for elycruz/rust-book written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/elycruz/rust-book/Cargo.toml
[INFO] crate elycruz/rust-book 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing elycruz/rust-book 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-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/elycruz/rust-book:/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] 24d08044c2177b8f62719b2bbc09786b21c1673963fcad9da61704c4b526d490
[INFO] running `"docker" "start" "-a" "24d08044c2177b8f62719b2bbc09786b21c1673963fcad9da61704c4b526d490"`
[INFO] [stderr]    Compiling rust-book v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `maximum`
[INFO] [stderr]   --> src/chp8/main.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn maximum<T: Ord + Debug>(xs: &Vec<T>) -> Option<&T> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.31s
[INFO] running `"docker" "inspect" "24d08044c2177b8f62719b2bbc09786b21c1673963fcad9da61704c4b526d490"`
[INFO] running `"docker" "rm" "-f" "24d08044c2177b8f62719b2bbc09786b21c1673963fcad9da61704c4b526d490"`
[INFO] [stdout] 24d08044c2177b8f62719b2bbc09786b21c1673963fcad9da61704c4b526d490
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/elycruz/rust-book:/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] 3c4fc25035540ae518a6aca3e1866cb82ad6f03fccf14bd222dd7230f68c7f00
[INFO] running `"docker" "start" "-a" "3c4fc25035540ae518a6aca3e1866cb82ad6f03fccf14bd222dd7230f68c7f00"`
[INFO] [stderr]    Compiling rust-book v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.58s
[INFO] running `"docker" "inspect" "3c4fc25035540ae518a6aca3e1866cb82ad6f03fccf14bd222dd7230f68c7f00"`
[INFO] running `"docker" "rm" "-f" "3c4fc25035540ae518a6aca3e1866cb82ad6f03fccf14bd222dd7230f68c7f00"`
[INFO] [stdout] 3c4fc25035540ae518a6aca3e1866cb82ad6f03fccf14bd222dd7230f68c7f00
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/elycruz/rust-book:/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] bb7e776c39df0f06b092fc7fee3ef0e3ecb8e5992d0089d1e15b877e7ba56fb9
[INFO] running `"docker" "start" "-a" "bb7e776c39df0f06b092fc7fee3ef0e3ecb8e5992d0089d1e15b877e7ba56fb9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chp12-cd19e5c59e40ee15
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test minigrep::tests::test_case_insensitive ... ok
[INFO] [stdout] test minigrep::tests::test_one_result ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chp2-828bf954d2801fea
[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/chp5-cd79a9561b79456c
[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 1 test
[INFO] [stdout] test tests::test_maximum ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chp8-396ee7066ac4bcdd
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_book-dae1e75495aa1339
[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" "bb7e776c39df0f06b092fc7fee3ef0e3ecb8e5992d0089d1e15b877e7ba56fb9"`
[INFO] running `"docker" "rm" "-f" "bb7e776c39df0f06b092fc7fee3ef0e3ecb8e5992d0089d1e15b877e7ba56fb9"`
[INFO] [stdout] bb7e776c39df0f06b092fc7fee3ef0e3ecb8e5992d0089d1e15b877e7ba56fb9