[INFO] cloning repository n3phtys/lmdb-rs-example-benchmark
[INFO] running `"git" "clone" "--bare" "git://github.com/n3phtys/lmdb-rs-example-benchmark.git" "work/cache/sources/gh/n3phtys/lmdb-rs-example-benchmark"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/n3phtys/lmdb-rs-example-benchmark'...
[INFO] running `"git" "clone" "work/cache/sources/gh/n3phtys/lmdb-rs-example-benchmark" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/n3phtys/lmdb-rs-example-benchmark"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/n3phtys/lmdb-rs-example-benchmark'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/n3phtys/lmdb-rs-example-benchmark" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/n3phtys/lmdb-rs-example-benchmark"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/n3phtys/lmdb-rs-example-benchmark'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1470ee0c2e69bded781bb0575841f1e3e1341672
[INFO] sha for GitHub repo n3phtys/lmdb-rs-example-benchmark: 1470ee0c2e69bded781bb0575841f1e3e1341672
[INFO] validating manifest of n3phtys/lmdb-rs-example-benchmark on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of n3phtys/lmdb-rs-example-benchmark on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing n3phtys/lmdb-rs-example-benchmark
[INFO] finished frobbing n3phtys/lmdb-rs-example-benchmark
[INFO] frobbed toml for n3phtys/lmdb-rs-example-benchmark written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/n3phtys/lmdb-rs-example-benchmark/Cargo.toml
[INFO] started frobbing n3phtys/lmdb-rs-example-benchmark
[INFO] finished frobbing n3phtys/lmdb-rs-example-benchmark
[INFO] frobbed toml for n3phtys/lmdb-rs-example-benchmark written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/n3phtys/lmdb-rs-example-benchmark/Cargo.toml
[INFO] crate n3phtys/lmdb-rs-example-benchmark already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking n3phtys/lmdb-rs-example-benchmark against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-6/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/n3phtys/lmdb-rs-example-benchmark:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 77d1df2275838b432471c785a7710d90e954da40e53c3fa7b2ba77c5d0e8539e
[INFO] running `"docker" "start" "-a" "77d1df2275838b432471c785a7710d90e954da40e53c3fa7b2ba77c5d0e8539e"`
[INFO] [stderr]    Compiling lmdb-sys v0.7.1
[INFO] [stderr]     Checking tempdir v0.3.5
[INFO] [stderr]     Checking lmdb v0.7.1
[INFO] [stderr]     Checking lmdb-rs-benchmark v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `database`
[INFO] [stderr]   --> benches/benchmark.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let database = db_environment.create_db(None, db_flags).unwrap();
[INFO] [stderr]    |             ^^^^^^^^ help: consider prefixing with an underscore: `_database`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> benches/benchmark.rs:59:17
[INFO] [stderr]    |
[INFO] [stderr] 59 |             let key = transform_u32_to_array_of_u8(iteration);
[INFO] [stderr]    |                 ^^^ help: consider prefixing with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> benches/benchmark.rs:87:17
[INFO] [stderr]    |
[INFO] [stderr] 87 |             let key = transform_u32_to_array_of_u8(iteration);
[INFO] [stderr]    |                 ^^^ help: consider prefixing with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]    --> benches/benchmark.rs:115:17
[INFO] [stderr]     |
[INFO] [stderr] 115 |             let key = transform_u32_to_array_of_u8(iteration);
[INFO] [stderr]     |                 ^^^ help: consider prefixing with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `db_flags`
[INFO] [stderr]    --> benches/benchmark.rs:131:13
[INFO] [stderr]     |
[INFO] [stderr] 131 |         let db_flags: lmdb::DatabaseFlags = lmdb::DatabaseFlags::empty();
[INFO] [stderr]     |             ^^^^^^^^ help: consider prefixing with an underscore: `_db_flags`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `db_environment`
[INFO] [stderr]    --> benches/benchmark.rs:132:13
[INFO] [stderr]     |
[INFO] [stderr] 132 |         let db_environment = lmdb::Environment::new().set_max_dbs(1).open(dir.as_ref()).unwrap();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_db_environment`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]    --> benches/benchmark.rs:143:17
[INFO] [stderr]     |
[INFO] [stderr] 143 |             let key = transform_u32_to_array_of_u8(iteration);
[INFO] [stderr]     |                 ^^^ help: consider prefixing with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.87s
[INFO] running `"docker" "inspect" "77d1df2275838b432471c785a7710d90e954da40e53c3fa7b2ba77c5d0e8539e"`
[INFO] running `"docker" "rm" "-f" "77d1df2275838b432471c785a7710d90e954da40e53c3fa7b2ba77c5d0e8539e"`
[INFO] [stdout] 77d1df2275838b432471c785a7710d90e954da40e53c3fa7b2ba77c5d0e8539e