[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/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/dhatch/cache-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/dhatch/cache-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dhatch/cache-rust" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/dhatch/cache-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/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 master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dhatch/cache-rust on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "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/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/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/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking dhatch/cache-rust against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/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=forbid" "-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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] af239136442d7a32bfa25a0aedbe4d6831646dce8533b2573e9fdf8b4b3e2039
[INFO] running `"docker" "start" "-a" "af239136442d7a32bfa25a0aedbe4d6831646dce8533b2573e9fdf8b4b3e2039"`
[INFO] [stderr]     Checking intrusive-collections v0.7.8
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking 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 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: variable `cacheA` should have a snake case name
[INFO] [stderr]   --> benches/bench_main.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let cacheA = Arc::clone(&cache);
[INFO] [stderr]    |             ^^^^^^ help: convert the identifier to snake case: `cache_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `cacheB` should have a snake case name
[INFO] [stderr]   --> benches/bench_main.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let cacheB = Arc::clone(&cache);
[INFO] [stderr]    |             ^^^^^^ help: convert the identifier to snake case: `cache_b`
[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 3.40s
[INFO] running `"docker" "inspect" "af239136442d7a32bfa25a0aedbe4d6831646dce8533b2573e9fdf8b4b3e2039"`
[INFO] running `"docker" "rm" "-f" "af239136442d7a32bfa25a0aedbe4d6831646dce8533b2573e9fdf8b4b3e2039"`
[INFO] [stdout] af239136442d7a32bfa25a0aedbe4d6831646dce8533b2573e9fdf8b4b3e2039