[INFO] fetching crate prom-attire-impl 0.1.0...
[INFO] checking prom-attire-impl-0.1.0 against beta for pr-78714
[INFO] extracting crate prom-attire-impl 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate prom-attire-impl 0.1.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prom-attire-impl 0.1.0
[INFO] finished tweaking crates.io crate prom-attire-impl 0.1.0
[INFO] tweaked toml for crates.io crate prom-attire-impl 0.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 27c784d2221df836e6e961322a23b5e8561148290b5e96e4ba7f614b2447ec2c
[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" "27c784d2221df836e6e961322a23b5e8561148290b5e96e4ba7f614b2447ec2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27c784d2221df836e6e961322a23b5e8561148290b5e96e4ba7f614b2447ec2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27c784d2221df836e6e961322a23b5e8561148290b5e96e4ba7f614b2447ec2c", kill_on_drop: false }`
[INFO] [stdout] 27c784d2221df836e6e961322a23b5e8561148290b5e96e4ba7f614b2447ec2c
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad6f499e294bb760acdc8dae499876d60ca3cf6ab1e33d4406f9c05705648ef2
[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" "ad6f499e294bb760acdc8dae499876d60ca3cf6ab1e33d4406f9c05705648ef2", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-xid v0.0.4
[INFO] [stderr]     Checking quote v0.3.15
[INFO] [stderr]     Checking error-chain v0.8.1
[INFO] [stderr]     Checking synom v0.11.3
[INFO] [stderr]     Checking syn v0.11.11
[INFO] [stderr]     Checking prom-attire-impl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unknown lint: `large_enum_variant`
[INFO] [stdout]  --> src/errors.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![allow(large_enum_variant)]
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `large_enum_variant`
[INFO] [stdout]  --> src/errors.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![allow(large_enum_variant)]
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:22:33
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub parse_field_config: &'a Fn(&[syn::Attribute]) -> FieldConfig,
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&[syn::Attribute]) -> FieldConfig`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:22:33
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub parse_field_config: &'a Fn(&[syn::Attribute]) -> FieldConfig,
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&[syn::Attribute]) -> FieldConfig`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.12s
[INFO] running `Command { std: "docker" "inspect" "ad6f499e294bb760acdc8dae499876d60ca3cf6ab1e33d4406f9c05705648ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad6f499e294bb760acdc8dae499876d60ca3cf6ab1e33d4406f9c05705648ef2", kill_on_drop: false }`
[INFO] [stdout] ad6f499e294bb760acdc8dae499876d60ca3cf6ab1e33d4406f9c05705648ef2