[INFO] updating cached repository MnO2/kvs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/MnO2/kvs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/MnO2/kvs" "work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/MnO2/kvs"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/MnO2/kvs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/MnO2/kvs" "work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/MnO2/kvs"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/MnO2/kvs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4c039788a612aec68cbf0eca0bdaa3febb082f76
[INFO] sha for GitHub repo MnO2/kvs: 4c039788a612aec68cbf0eca0bdaa3febb082f76
[INFO] validating manifest of MnO2/kvs on toolchain master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of MnO2/kvs on toolchain try#18481b65f318e0b4b20c0fc61340054701719d6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing MnO2/kvs
[INFO] finished frobbing MnO2/kvs
[INFO] frobbed toml for MnO2/kvs written to work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/MnO2/kvs/Cargo.toml
[INFO] started frobbing MnO2/kvs
[INFO] finished frobbing MnO2/kvs
[INFO] frobbed toml for MnO2/kvs written to work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/MnO2/kvs/Cargo.toml
[INFO] crate MnO2/kvs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking MnO2/kvs against master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7 for pr-62507
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62507/worker-7/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/MnO2/kvs:/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" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] af05ee1c4f3aef6f7e4b3e6c39c93969fd75babec0219d3527bc952922683025
[INFO] running `"docker" "start" "-a" "af05ee1c4f3aef6f7e4b3e6c39c93969fd75babec0219d3527bc952922683025"`
[INFO] [stderr]    Compiling syn v0.15.36
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling regex v1.1.7
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking normalize-line-endings v0.2.2
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.7
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking walkdir v2.2.8
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking bitflags v1.1.0
[INFO] [stderr]     Checking aho-corasick v0.7.3
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]     Checking tempfile v3.0.8
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking kvs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]   --> src/lib.rs:36:33
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stderr]    |                                 ^^^^ help: consider prefixing with an underscore: `_path`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]   --> src/lib.rs:36:33
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stderr]    |                                 ^^^^ help: consider prefixing with an underscore: `_path`
[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]    --> tests/tests.rs:194:9
[INFO] [stderr]     |
[INFO] [stderr] 194 |     let mut store = KvStore::open(temp_dir.path())?;
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/tests.rs:233:9
[INFO] [stderr]     |
[INFO] [stderr] 233 |     let mut store = KvStore::open(temp_dir.path())?;
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/tests.rs:292:13
[INFO] [stderr]     |
[INFO] [stderr] 292 |         let mut store = KvStore::open(temp_dir.path())?;
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.83s
[INFO] running `"docker" "inspect" "af05ee1c4f3aef6f7e4b3e6c39c93969fd75babec0219d3527bc952922683025"`
[INFO] running `"docker" "rm" "-f" "af05ee1c4f3aef6f7e4b3e6c39c93969fd75babec0219d3527bc952922683025"`
[INFO] [stdout] af05ee1c4f3aef6f7e4b3e6c39c93969fd75babec0219d3527bc952922683025