[INFO] cloning repository https://github.com/n3phtys/lmdb-rs-example-benchmark
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/n3phtys/lmdb-rs-example-benchmark" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fn3phtys%2Flmdb-rs-example-benchmark", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fn3phtys%2Flmdb-rs-example-benchmark'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1470ee0c2e69bded781bb0575841f1e3e1341672
[INFO] checking n3phtys/lmdb-rs-example-benchmark against try#9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c for pr-79472
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fn3phtys%2Flmdb-rs-example-benchmark" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/n3phtys/lmdb-rs-example-benchmark on toolchain 9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/n3phtys/lmdb-rs-example-benchmark
[INFO] finished tweaking git repo https://github.com/n3phtys/lmdb-rs-example-benchmark
[INFO] tweaked toml for git repo https://github.com/n3phtys/lmdb-rs-example-benchmark written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/n3phtys/lmdb-rs-example-benchmark already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lmdb v0.7.1
[INFO] [stderr]   Downloaded lmdb-sys v0.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ed930798e7592e1fb537808547f58220f5be8ab99ce1e0c0360a4fc6d22b534
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1ed930798e7592e1fb537808547f58220f5be8ab99ce1e0c0360a4fc6d22b534", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ed930798e7592e1fb537808547f58220f5be8ab99ce1e0c0360a4fc6d22b534", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ed930798e7592e1fb537808547f58220f5be8ab99ce1e0c0360a4fc6d22b534", kill_on_drop: false }`
[INFO] [stdout] 1ed930798e7592e1fb537808547f58220f5be8ab99ce1e0c0360a4fc6d22b534
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8b11c1d6f600f721858d783bf3091259ce5ad4256cbdc357fd630caffdf1e9ce
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8b11c1d6f600f721858d783bf3091259ce5ad4256cbdc357fd630caffdf1e9ce", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.29
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling pkg-config v0.3.9
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking num-traits v0.1.40
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling lmdb-sys v0.7.1
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking serde_json v1.0.2
[INFO] [stderr]    Compiling serde_derive_internals v0.15.1
[INFO] [stderr]     Checking tempdir v0.3.5
[INFO] [stderr]     Checking lmdb v0.7.1
[INFO] [stderr]    Compiling serde_derive v1.0.11
[INFO] [stderr]     Checking lmdb-rs-benchmark v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `database`
[INFO] [stdout]   --> benches/benchmark.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let database = db_environment.create_db(None, db_flags).unwrap();
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_database`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> benches/benchmark.rs:59:17
[INFO] [stdout]    |
[INFO] [stdout] 59 |             let key = transform_u32_to_array_of_u8(iteration);
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> benches/benchmark.rs:87:17
[INFO] [stdout]    |
[INFO] [stdout] 87 |             let key = transform_u32_to_array_of_u8(iteration);
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> benches/benchmark.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |             let key = transform_u32_to_array_of_u8(iteration);
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `db_flags`
[INFO] [stdout]    --> benches/benchmark.rs:131:13
[INFO] [stdout]     |
[INFO] [stdout] 131 |         let db_flags: lmdb::DatabaseFlags = lmdb::DatabaseFlags::empty();
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_db_flags`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `db_environment`
[INFO] [stdout]    --> benches/benchmark.rs:132:13
[INFO] [stdout]     |
[INFO] [stdout] 132 |         let db_environment = lmdb::Environment::new().set_max_dbs(1).open(dir.as_ref()).unwrap();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_db_environment`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> benches/benchmark.rs:143:17
[INFO] [stdout]     |
[INFO] [stdout] 143 |             let key = transform_u32_to_array_of_u8(iteration);
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.51s
[INFO] running `Command { std: "docker" "inspect" "8b11c1d6f600f721858d783bf3091259ce5ad4256cbdc357fd630caffdf1e9ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b11c1d6f600f721858d783bf3091259ce5ad4256cbdc357fd630caffdf1e9ce", kill_on_drop: false }`
[INFO] [stdout] 8b11c1d6f600f721858d783bf3091259ce5ad4256cbdc357fd630caffdf1e9ce