[INFO] fetching crate is_empty_derive 0.1.0...
[INFO] checking is_empty_derive-0.1.0 against master#5ad98b4026d5172f27615b105658bc8bfd677be8 for pr-129422
[INFO] extracting crate is_empty_derive 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate is_empty_derive 0.1.0 on toolchain 5ad98b4026d5172f27615b105658bc8bfd677be8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5ad98b4026d5172f27615b105658bc8bfd677be8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate is_empty_derive 0.1.0
[INFO] finished tweaking crates.io crate is_empty_derive 0.1.0
[INFO] tweaked toml for crates.io crate is_empty_derive 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5ad98b4026d5172f27615b105658bc8bfd677be8" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.77)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5ad98b4026d5172f27615b105658bc8bfd677be8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+5ad98b4026d5172f27615b105658bc8bfd677be8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92e14a64165144faa3a9a25f8658f13f65f14aa3cbc5ce83d024a9f4e5e447e4
[INFO] running `Command { std: "docker" "start" "-a" "92e14a64165144faa3a9a25f8658f13f65f14aa3cbc5ce83d024a9f4e5e447e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92e14a64165144faa3a9a25f8658f13f65f14aa3cbc5ce83d024a9f4e5e447e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92e14a64165144faa3a9a25f8658f13f65f14aa3cbc5ce83d024a9f4e5e447e4", kill_on_drop: false }`
[INFO] [stdout] 92e14a64165144faa3a9a25f8658f13f65f14aa3cbc5ce83d024a9f4e5e447e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+5ad98b4026d5172f27615b105658bc8bfd677be8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d27d3e1cdb23f168d2783a9c63314e1346beb60fe5d235e49603c42c6b987ba0
[INFO] running `Command { std: "docker" "start" "-a" "d27d3e1cdb23f168d2783a9c63314e1346beb60fe5d235e49603c42c6b987ba0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking quote v1.0.37
[INFO] [stderr]     Checking is_empty_derive v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `A` is never constructed
[INFO] [stdout]   --> tests/test_expand.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct A {
[INFO] [stdout]    |        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]  --> tests/test_expand.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub trait IsEmpty {
[INFO] [stdout]   |               ------- method in this trait
[INFO] [stdout] 5 |         fn is_empty(&self) -> bool;
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.29s
[INFO] running `Command { std: "docker" "inspect" "d27d3e1cdb23f168d2783a9c63314e1346beb60fe5d235e49603c42c6b987ba0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d27d3e1cdb23f168d2783a9c63314e1346beb60fe5d235e49603c42c6b987ba0", kill_on_drop: false }`
[INFO] [stdout] d27d3e1cdb23f168d2783a9c63314e1346beb60fe5d235e49603c42c6b987ba0