[INFO] fetching crate scrappy-rt 0.0.1...
[INFO] checking scrappy-rt-0.0.1 against try#9c1dcf141bc0875407c4eb36972857bd3db713e2 for pr-81863
[INFO] extracting crate scrappy-rt 0.0.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate scrappy-rt 0.0.1 on toolchain 9c1dcf141bc0875407c4eb36972857bd3db713e2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate scrappy-rt 0.0.1
[INFO] finished tweaking crates.io crate scrappy-rt 0.0.1
[INFO] tweaked toml for crates.io crate scrappy-rt 0.0.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:ce6408862c0f4858e6cd2b85b2cf085ff7d0d6323904d0a94b71664a228554ab" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae35de04c698e5505496763167f865d18e8adaa978c7bf2af6b53c3ec81bc9c1
[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" "ae35de04c698e5505496763167f865d18e8adaa978c7bf2af6b53c3ec81bc9c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae35de04c698e5505496763167f865d18e8adaa978c7bf2af6b53c3ec81bc9c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae35de04c698e5505496763167f865d18e8adaa978c7bf2af6b53c3ec81bc9c1", kill_on_drop: false }`
[INFO] [stdout] ae35de04c698e5505496763167f865d18e8adaa978c7bf2af6b53c3ec81bc9c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:ce6408862c0f4858e6cd2b85b2cf085ff7d0d6323904d0a94b71664a228554ab" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 208cb115bdcbd76b4c7920202151f52a286d4a41b2e5cd7c97ba5e67fa517bba
[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" "208cb115bdcbd76b4c7920202151f52a286d4a41b2e5cd7c97ba5e67fa517bba", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-macro v0.3.12
[INFO] [stderr]    Compiling derive_more v0.99.11
[INFO] [stderr]    Compiling scrappy-macros v0.0.1
[INFO] [stderr]     Checking futures-util v0.3.12
[INFO] [stderr]     Checking scrappy-threadpool v0.0.1
[INFO] [stderr]     Checking futures-executor v0.3.12
[INFO] [stderr]     Checking futures v0.3.12
[INFO] [stderr]     Checking scrappy-rt v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: field is never read: `name`
[INFO] [stdout]   --> src/builder.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     name: Cow<'static, str>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:2:27
[INFO] [stdout]    |
[INFO] [stdout] 2  | #![deny(rust_2018_idioms, warnings)]
[INFO] [stdout]    |                           ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(dead_code)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `scrappy-rt`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: field is never read: `name`
[INFO] [stdout]   --> src/builder.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     name: Cow<'static, str>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:2:27
[INFO] [stdout]    |
[INFO] [stdout] 2  | #![deny(rust_2018_idioms, warnings)]
[INFO] [stdout]    |                           ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(dead_code)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "208cb115bdcbd76b4c7920202151f52a286d4a41b2e5cd7c97ba5e67fa517bba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "208cb115bdcbd76b4c7920202151f52a286d4a41b2e5cd7c97ba5e67fa517bba", kill_on_drop: false }`
[INFO] [stdout] 208cb115bdcbd76b4c7920202151f52a286d4a41b2e5cd7c97ba5e67fa517bba