[INFO] fetching crate polodb_core 0.2.0...
[INFO] checking polodb_core-0.2.0 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] extracting crate polodb_core 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate polodb_core 0.2.0 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polodb_core 0.2.0
[INFO] finished tweaking crates.io crate polodb_core 0.2.0
[INFO] tweaked toml for crates.io crate polodb_core 0.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded polodb_bson v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2e24eded184912ee22ea53a74317009e45fb8cf2cc8aba8b4d573a7cf876f63b
[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" "2e24eded184912ee22ea53a74317009e45fb8cf2cc8aba8b4d573a7cf876f63b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e24eded184912ee22ea53a74317009e45fb8cf2cc8aba8b4d573a7cf876f63b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e24eded184912ee22ea53a74317009e45fb8cf2cc8aba8b4d573a7cf876f63b", kill_on_drop: false }`
[INFO] [stdout] 2e24eded184912ee22ea53a74317009e45fb8cf2cc8aba8b4d573a7cf876f63b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e5fb70561e39fc1c284a5d038bb9639800b10d38ea073bba692809e194db89d
[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" "5e5fb70561e39fc1c284a5d038bb9639800b10d38ea073bba692809e194db89d", kill_on_drop: false }`
[INFO] [stderr]     Checking polodb_bson v0.2.0
[INFO] [stderr]     Checking polodb_core v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `create_index`
[INFO] [stdout]   --> db.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn create_index(&mut self, keys: &Document, options: Option<&Document>) -> DbResult<()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> meta_doc_helper.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn new(id: String, root_pid: u32) -> MetaDocEntry {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.18s
[INFO] running `Command { std: "docker" "inspect" "5e5fb70561e39fc1c284a5d038bb9639800b10d38ea073bba692809e194db89d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e5fb70561e39fc1c284a5d038bb9639800b10d38ea073bba692809e194db89d", kill_on_drop: false }`
[INFO] [stdout] 5e5fb70561e39fc1c284a5d038bb9639800b10d38ea073bba692809e194db89d