[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 master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fn3phtys%2Flmdb-rs-example-benchmark" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/n3phtys/lmdb-rs-example-benchmark on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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-5/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" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 694208ce64b1091b6cd8d89cc90f862f82dd3c3d110f53bc650bf43e247a60fc
[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" "694208ce64b1091b6cd8d89cc90f862f82dd3c3d110f53bc650bf43e247a60fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "694208ce64b1091b6cd8d89cc90f862f82dd3c3d110f53bc650bf43e247a60fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "694208ce64b1091b6cd8d89cc90f862f82dd3c3d110f53bc650bf43e247a60fc", kill_on_drop: false }`
[INFO] [stdout] 694208ce64b1091b6cd8d89cc90f862f82dd3c3d110f53bc650bf43e247a60fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f66addc951fac0fe76b65e0848a7e3805e9c9554ac89516e327b86eb891242d3
[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" "f66addc951fac0fe76b65e0848a7e3805e9c9554ac89516e327b86eb891242d3", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.29
[INFO] [stderr]    Compiling gcc v0.3.51
[INFO] [stderr]     Checking serde v1.0.11
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]    Compiling lmdb-sys v0.7.1
[INFO] [stderr]     Checking tempdir v0.3.5
[INFO] [stderr]    Compiling serde_derive_internals v0.15.1
[INFO] [stderr]     Checking lmdb v0.7.1
[INFO] [stderr]    Compiling serde_derive v1.0.11
[INFO] [stderr]     Checking serde_json v1.0.2
[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 18.60s
[INFO] running `Command { std: "docker" "inspect" "f66addc951fac0fe76b65e0848a7e3805e9c9554ac89516e327b86eb891242d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f66addc951fac0fe76b65e0848a7e3805e9c9554ac89516e327b86eb891242d3", kill_on_drop: false }`
[INFO] [stdout] f66addc951fac0fe76b65e0848a7e3805e9c9554ac89516e327b86eb891242d3