[INFO] updating cached repository dhatch/cache-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dhatch/cache-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dhatch/cache-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/dhatch/cache-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/dhatch/cache-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dhatch/cache-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dhatch/cache-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dhatch/cache-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 244b5258f6389f1b17755dbbb99de8c07c5c24b5
[INFO] sha for GitHub repo dhatch/cache-rust: 244b5258f6389f1b17755dbbb99de8c07c5c24b5
[INFO] validating manifest of dhatch/cache-rust 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 dhatch/cache-rust 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 dhatch/cache-rust
[INFO] removed workspace from dhatch/cache-rust
[INFO] finished frobbing dhatch/cache-rust
[INFO] frobbed toml for dhatch/cache-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/dhatch/cache-rust/Cargo.toml
[INFO] started frobbing dhatch/cache-rust
[INFO] removed workspace from dhatch/cache-rust
[INFO] finished frobbing dhatch/cache-rust
[INFO] frobbed toml for dhatch/cache-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dhatch/cache-rust/Cargo.toml
[INFO] crate dhatch/cache-rust 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 dhatch/cache-rust 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-4/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/dhatch/cache-rust:/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] 0c706d121552d292ef7513dd2f6747229cc3b96733e0f8a1a0771ed49344a4d7
[INFO] running `"docker" "start" "-a" "0c706d121552d292ef7513dd2f6747229cc3b96733e0f8a1a0771ed49344a4d7"`
[INFO] [stderr]    Compiling intrusive-collections v0.7.8
[INFO] [stderr]    Compiling cache v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/cache.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `"docker" "inspect" "0c706d121552d292ef7513dd2f6747229cc3b96733e0f8a1a0771ed49344a4d7"`
[INFO] running `"docker" "rm" "-f" "0c706d121552d292ef7513dd2f6747229cc3b96733e0f8a1a0771ed49344a4d7"`
[INFO] [stdout] 0c706d121552d292ef7513dd2f6747229cc3b96733e0f8a1a0771ed49344a4d7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/dhatch/cache-rust:/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] 95bea52b5be4103f882459a67e6266a724eafc4426c7395ff387c0cae18c07c7
[INFO] running `"docker" "start" "-a" "95bea52b5be4103f882459a67e6266a724eafc4426c7395ff387c0cae18c07c7"`
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling cache v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/cache.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k2`
[INFO] [stderr]    --> src/cache.rs:246:13
[INFO] [stderr]     |
[INFO] [stderr] 246 |         let k2 = "key2";
[INFO] [stderr]     |             ^^ help: consider prefixing with an underscore: `_k2`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cache.rs:220:13
[INFO] [stderr]     |
[INFO] [stderr] 220 |         let mut cache: LRUCache<&str, u64> = LRUCache::new(10);
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.65s
[INFO] running `"docker" "inspect" "95bea52b5be4103f882459a67e6266a724eafc4426c7395ff387c0cae18c07c7"`
[INFO] running `"docker" "rm" "-f" "95bea52b5be4103f882459a67e6266a724eafc4426c7395ff387c0cae18c07c7"`
[INFO] [stdout] 95bea52b5be4103f882459a67e6266a724eafc4426c7395ff387c0cae18c07c7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/dhatch/cache-rust:/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] 9d207580953e6d34b93ebddca8d7ec6294f60c4de882c3435e00fe293228d63d
[INFO] running `"docker" "start" "-a" "9d207580953e6d34b93ebddca8d7ec6294f60c4de882c3435e00fe293228d63d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cache-d8c0ed20096449d9
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test cache::tests::evict ... ok
[INFO] [stdout] test cache::tests::replace ... ok
[INFO] [stdout] test cache::tests::miss ... ok
[INFO] [stdout] test cache::tests::hit ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests cache
[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" "9d207580953e6d34b93ebddca8d7ec6294f60c4de882c3435e00fe293228d63d"`
[INFO] running `"docker" "rm" "-f" "9d207580953e6d34b93ebddca8d7ec6294f60c4de882c3435e00fe293228d63d"`
[INFO] [stdout] 9d207580953e6d34b93ebddca8d7ec6294f60c4de882c3435e00fe293228d63d