[INFO] cloning repository https://github.com/connec/kvs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/connec/kvs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconnec%2Fkvs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconnec%2Fkvs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] afdf5b99b4c0ccf111900cc121486f05e1e54be1
[INFO] documenting connec/kvs against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconnec%2Fkvs" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/connec/kvs on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/connec/kvs
[INFO] finished tweaking git repo https://github.com/connec/kvs
[INFO] tweaked toml for git repo https://github.com/connec/kvs written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/connec/kvs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded criterion v0.2.11
[INFO] [stderr]   Downloaded criterion-plot v0.3.1
[INFO] [stderr]   Downloaded historian v4.0.3
[INFO] [stderr]   Downloaded rmp v0.8.7
[INFO] [stderr]   Downloaded rmp-serde v0.13.7
[INFO] [stderr]   Downloaded csv v1.0.7
[INFO] [stderr]   Downloaded slog v2.4.1
[INFO] [stderr]   Downloaded slog-term v2.4.0
[INFO] [stderr]   Downloaded hashbrown v0.3.1
[INFO] [stderr]   Downloaded slog-async v2.3.0
[INFO] [stderr]   Downloaded sled v0.24.1
[INFO] [stderr]   Downloaded pagecache v0.17.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b4416ae3a15aa49ca798c2e78cbd97ff7572f37db656313f55dfce89f1e0f9e0
[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" "b4416ae3a15aa49ca798c2e78cbd97ff7572f37db656313f55dfce89f1e0f9e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4416ae3a15aa49ca798c2e78cbd97ff7572f37db656313f55dfce89f1e0f9e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4416ae3a15aa49ca798c2e78cbd97ff7572f37db656313f55dfce89f1e0f9e0", kill_on_drop: false }`
[INFO] [stdout] b4416ae3a15aa49ca798c2e78cbd97ff7572f37db656313f55dfce89f1e0f9e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf478594f95400915a52a016687d4ca32bb5fb05ef503df9f4f4e2fc79939b1d
[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" "bf478594f95400915a52a016687d4ca32bb5fb05ef503df9f4f4e2fc79939b1d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v0.15.36
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling slog v2.4.1
[INFO] [stderr]     Checking historian v4.0.3
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]     Checking chrono v0.4.7
[INFO] [stderr]     Checking tempfile v3.0.8
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking slog-async v2.3.0
[INFO] [stderr]     Checking slog-term v2.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking bincode v1.1.4
[INFO] [stderr]     Checking hashbrown v0.3.1
[INFO] [stderr]     Checking serde_bytes v0.11.1
[INFO] [stderr]     Checking rmp-serde v0.13.7
[INFO] [stderr]     Checking pagecache v0.17.0
[INFO] [stderr]     Checking sled v0.24.1
[INFO] [stderr]     Checking kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/engine/kvs.rs:274:17
[INFO] [stdout]     |
[INFO] [stdout] 274 |                 mem::replace(old_entry, new_entry);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 51.21s
[INFO] running `Command { std: "docker" "inspect" "bf478594f95400915a52a016687d4ca32bb5fb05ef503df9f4f4e2fc79939b1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf478594f95400915a52a016687d4ca32bb5fb05ef503df9f4f4e2fc79939b1d", kill_on_drop: false }`
[INFO] [stdout] bf478594f95400915a52a016687d4ca32bb5fb05ef503df9f4f4e2fc79939b1d