[INFO] fetching crate transaction 0.2.1...
[INFO] documenting transaction-0.2.1 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate transaction 0.2.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate transaction 0.2.1 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate transaction 0.2.1
[INFO] finished tweaking crates.io crate transaction 0.2.1
[INFO] tweaked toml for crates.io crate transaction 0.2.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 149cec81588f368b7680bead12027811dbe0c2fd6c5ac3c0de36d83e5f578d7f
[INFO] running `Command { std: "docker" "start" "-a" "149cec81588f368b7680bead12027811dbe0c2fd6c5ac3c0de36d83e5f578d7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "149cec81588f368b7680bead12027811dbe0c2fd6c5ac3c0de36d83e5f578d7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "149cec81588f368b7680bead12027811dbe0c2fd6c5ac3c0de36d83e5f578d7f", kill_on_drop: false }`
[INFO] [stdout] 149cec81588f368b7680bead12027811dbe0c2fd6c5ac3c0de36d83e5f578d7f
[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" "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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 14289f22f6ede93e0b4c75b1a1db6a5c5962a98ad3ce6dc384398ef6049443f4
[INFO] running `Command { std: "docker" "start" "-a" "14289f22f6ede93e0b4c75b1a1db6a5c5962a98ad3ce6dc384398ef6049443f4", kill_on_drop: false }`
[INFO] [stderr]  Documenting transaction v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/loop_fn.rs:23:27
[INFO] [stdout]    |
[INFO] [stdout] 23 |     _phantom: PhantomData<(Ctx)>,
[INFO] [stdout]    |                           ^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `Command { std: "docker" "inspect" "14289f22f6ede93e0b4c75b1a1db6a5c5962a98ad3ce6dc384398ef6049443f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14289f22f6ede93e0b4c75b1a1db6a5c5962a98ad3ce6dc384398ef6049443f4", kill_on_drop: false }`
[INFO] [stdout] 14289f22f6ede93e0b4c75b1a1db6a5c5962a98ad3ce6dc384398ef6049443f4
