[INFO] fetching crate ceres-derive 0.2.0...
[INFO] checking ceres-derive-0.2.0 against master#64b185eddaa1d7ddf5e0c024be23b9cbba6c1722 for pr-143929
[INFO] extracting crate ceres-derive 0.2.0 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate ceres-derive 0.2.0
[INFO] finished tweaking crates.io crate ceres-derive 0.2.0
[INFO] tweaked toml for crates.io crate ceres-derive 0.2.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ceres-derive 0.2.0 on toolchain 64b185eddaa1d7ddf5e0c024be23b9cbba6c1722
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.104)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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:e8955075918b6d00525c617f7c34ee2595c70db70b3cf844dc875e4d3604499b" "/opt/rustwide/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a414ac83824705b2861a42e7fc0b5cb6c5545c119e39ef4fe522ceb2a94503f7
[INFO] running `Command { std: "docker" "start" "-a" "a414ac83824705b2861a42e7fc0b5cb6c5545c119e39ef4fe522ceb2a94503f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a414ac83824705b2861a42e7fc0b5cb6c5545c119e39ef4fe522ceb2a94503f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a414ac83824705b2861a42e7fc0b5cb6c5545c119e39ef4fe522ceb2a94503f7", kill_on_drop: false }`
[INFO] [stdout] a414ac83824705b2861a42e7fc0b5cb6c5545c119e39ef4fe522ceb2a94503f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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:e8955075918b6d00525c617f7c34ee2595c70db70b3cf844dc875e4d3604499b" "/opt/rustwide/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c96e57691f7c9b59ef8d1dec883316078eadfb9c6c9379a473024f1d8aeffaf
[INFO] running `Command { std: "docker" "start" "-a" "8c96e57691f7c9b59ef8d1dec883316078eadfb9c6c9379a473024f1d8aeffaf", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking ceres-derive v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `tk` is never read
[INFO] [stdout]   --> src/arg.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Arg {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 11 |     pub field: Ident,
[INFO] [stdout] 12 |     pub tk: Token![:],
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `vis`, `paren_token`, `arrow_t`, and `return_t` are never read
[INFO] [stdout]   --> src/fun.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct HostFunction {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] 14 |     pub attrs: Vec<Attribute>,
[INFO] [stdout] 15 |     pub vis: Visibility,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub paren_token: Paren,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 19 |     pub fields: Punctuated<Arg, Token![,]>,
[INFO] [stdout] 20 |     pub arrow_t: Token![->],
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 21 |     pub return_t: Type,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tk` is never read
[INFO] [stdout]   --> src/arg.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Arg {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 11 |     pub field: Ident,
[INFO] [stdout] 12 |     pub tk: Token![:],
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `vis`, `paren_token`, `arrow_t`, and `return_t` are never read
[INFO] [stdout]   --> src/fun.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct HostFunction {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] 14 |     pub attrs: Vec<Attribute>,
[INFO] [stdout] 15 |     pub vis: Visibility,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub paren_token: Paren,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 19 |     pub fields: Punctuated<Arg, Token![,]>,
[INFO] [stdout] 20 |     pub arrow_t: Token![->],
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 21 |     pub return_t: Type,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.17s
[INFO] running `Command { std: "docker" "inspect" "8c96e57691f7c9b59ef8d1dec883316078eadfb9c6c9379a473024f1d8aeffaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c96e57691f7c9b59ef8d1dec883316078eadfb9c6c9379a473024f1d8aeffaf", kill_on_drop: false }`
[INFO] [stdout] 8c96e57691f7c9b59ef8d1dec883316078eadfb9c6c9379a473024f1d8aeffaf