[INFO] fetching crate serde-enum-str 0.2.4...
[INFO] checking serde-enum-str-0.2.4 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate serde-enum-str 0.2.4 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate serde-enum-str 0.2.4 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde-enum-str 0.2.4
[INFO] finished tweaking crates.io crate serde-enum-str 0.2.4
[INFO] tweaked toml for crates.io crate serde-enum-str 0.2.4 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1c175ebc28e0ddb06eb54d90e8e11b265297322a4f43e3e0d4bd6281ca4bb722
[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" "1c175ebc28e0ddb06eb54d90e8e11b265297322a4f43e3e0d4bd6281ca4bb722", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c175ebc28e0ddb06eb54d90e8e11b265297322a4f43e3e0d4bd6281ca4bb722", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c175ebc28e0ddb06eb54d90e8e11b265297322a4f43e3e0d4bd6281ca4bb722", kill_on_drop: false }`
[INFO] [stdout] 1c175ebc28e0ddb06eb54d90e8e11b265297322a4f43e3e0d4bd6281ca4bb722
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--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] c1c805503255012ae84430d66a8bb1a90e4af7af6117467f62b98eb9b62ef856
[INFO] running `Command { std: "docker" "start" "-a" "c1c805503255012ae84430d66a8bb1a90e4af7af6117467f62b98eb9b62ef856", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking serde-rename-rule v0.1.1
[INFO] [stderr]     Checking quote v1.0.10
[INFO] [stderr]     Checking syn v1.0.82
[INFO] [stderr]     Checking darling_core v0.13.0
[INFO] [stderr]     Checking serde-attributes v0.1.1
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]     Checking darling v0.13.0
[INFO] [stderr]     Checking serde-enum-str v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `attrs`
[INFO] [stdout]    --> src/input.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 144 |     attrs: Vec<Attribute>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `vis`
[INFO] [stdout]    --> src/input.rs:145:5
[INFO] [stdout]     |
[INFO] [stdout] 145 |     vis: Visibility,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `attrs`
[INFO] [stdout]    --> src/input.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     attrs: Vec<Attribute>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `discriminant`
[INFO] [stdout]    --> src/input.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 160 |     discriminant: Option<Expr>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `attrs`
[INFO] [stdout]    --> src/input.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 144 |     attrs: Vec<Attribute>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `vis`
[INFO] [stdout]    --> src/input.rs:145:5
[INFO] [stdout]     |
[INFO] [stdout] 145 |     vis: Visibility,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `attrs`
[INFO] [stdout]    --> src/input.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     attrs: Vec<Attribute>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `discriminant`
[INFO] [stdout]    --> src/input.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 160 |     discriminant: Option<Expr>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde_json v1.0.72
[INFO] [stdout] warning: field is never read: `attrs`
[INFO] [stdout]    --> src/input.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 144 |     attrs: Vec<Attribute>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `vis`
[INFO] [stdout]    --> src/input.rs:145:5
[INFO] [stdout]     |
[INFO] [stdout] 145 |     vis: Visibility,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `attrs`
[INFO] [stdout]    --> src/input.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     attrs: Vec<Attribute>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `discriminant`
[INFO] [stdout]    --> src/input.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 160 |     discriminant: Option<Expr>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.17s
[INFO] running `Command { std: "docker" "inspect" "c1c805503255012ae84430d66a8bb1a90e4af7af6117467f62b98eb9b62ef856", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1c805503255012ae84430d66a8bb1a90e4af7af6117467f62b98eb9b62ef856", kill_on_drop: false }`
[INFO] [stdout] c1c805503255012ae84430d66a8bb1a90e4af7af6117467f62b98eb9b62ef856