[INFO] fetching crate zerogc-derive 0.2.0-alpha.5...
[INFO] checking zerogc-derive-0.2.0-alpha.5 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate zerogc-derive 0.2.0-alpha.5 into /workspace/builds/worker-34/source
[INFO] validating manifest of crates.io crate zerogc-derive 0.2.0-alpha.5 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zerogc-derive 0.2.0-alpha.5
[INFO] finished tweaking crates.io crate zerogc-derive 0.2.0-alpha.5
[INFO] tweaked toml for crates.io crate zerogc-derive 0.2.0-alpha.5 written to /workspace/builds/worker-34/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 386b2650aa13351f85b075e903f5f93e61c6eaa8169f819c29fdf9666bc8792a
[INFO] running `Command { std: "docker" "start" "-a" "386b2650aa13351f85b075e903f5f93e61c6eaa8169f819c29fdf9666bc8792a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "386b2650aa13351f85b075e903f5f93e61c6eaa8169f819c29fdf9666bc8792a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "386b2650aa13351f85b075e903f5f93e61c6eaa8169f819c29fdf9666bc8792a", kill_on_drop: false }`
[INFO] [stdout] 386b2650aa13351f85b075e903f5f93e61c6eaa8169f819c29fdf9666bc8792a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e3b1c9998e6b233c52578e8cee3e0bf773d83e5261d5af485010958a4911b22
[INFO] running `Command { std: "docker" "start" "-a" "2e3b1c9998e6b233c52578e8cee3e0bf773d83e5261d5af485010958a4911b22", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]    Compiling proc-macro-kwargs-derive v0.1.5
[INFO] [stderr]    Compiling proc-macro-kwargs v0.1.5
[INFO] [stderr]     Checking zerogc-derive v0.2.0-alpha.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling zerogc-derive v0.2.0-alpha.5
[INFO] [stdout] warning: field is never read: `brace`
[INFO] [stdout]    --> src/macros.rs:428:5
[INFO] [stdout]     |
[INFO] [stdout] 428 |     brace: ::syn::token::Brace
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `brace`
[INFO] [stdout]    --> src/macros.rs:428:5
[INFO] [stdout]     |
[INFO] [stdout] 428 |     brace: ::syn::token::Brace
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking zerogc v0.2.0-alpha.5
[INFO] [stdout] warning: field is never read: `brace`
[INFO] [stdout]    --> src/macros.rs:428:5
[INFO] [stdout]     |
[INFO] [stdout] 428 |     brace: ::syn::token::Brace
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.59s
[INFO] running `Command { std: "docker" "inspect" "2e3b1c9998e6b233c52578e8cee3e0bf773d83e5261d5af485010958a4911b22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e3b1c9998e6b233c52578e8cee3e0bf773d83e5261d5af485010958a4911b22", kill_on_drop: false }`
[INFO] [stdout] 2e3b1c9998e6b233c52578e8cee3e0bf773d83e5261d5af485010958a4911b22