[INFO] fetching crate docbot-derive 0.3.0-alpha.2...
[INFO] testing docbot-derive-0.3.0-alpha.2 against 1.76.0 for beta-1.77-1
[INFO] extracting crate docbot-derive 0.3.0-alpha.2 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate docbot-derive 0.3.0-alpha.2 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate docbot-derive 0.3.0-alpha.2
[INFO] finished tweaking crates.io crate docbot-derive 0.3.0-alpha.2
[INFO] tweaked toml for crates.io crate docbot-derive 0.3.0-alpha.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a324d25666af88a900f5590ff8a8fe8ac7fbe32140aae8958d74daa198390a82
[INFO] running `Command { std: "docker" "start" "-a" "a324d25666af88a900f5590ff8a8fe8ac7fbe32140aae8958d74daa198390a82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a324d25666af88a900f5590ff8a8fe8ac7fbe32140aae8958d74daa198390a82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a324d25666af88a900f5590ff8a8fe8ac7fbe32140aae8958d74daa198390a82", kill_on_drop: false }`
[INFO] [stdout] a324d25666af88a900f5590ff8a8fe8ac7fbe32140aae8958d74daa198390a82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d4fd848c08b2d29e9d0b6f97dbbf3c8dcde14f89c906268e9ef9754abc69162
[INFO] running `Command { std: "docker" "start" "-a" "6d4fd848c08b2d29e9d0b6f97dbbf3c8dcde14f89c906268e9ef9754abc69162", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.7.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling aho-corasick v1.1.2
[INFO] [stderr]    Compiling regex-automata v0.4.5
[INFO] [stderr]    Compiling regex v1.10.3
[INFO] [stderr]    Compiling docbot-derive v0.3.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Variant`
[INFO] [stdout]   --> inputs/mod.rs:10:36
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub use syn::{Generics, Ident, Variant, Visibility};
[INFO] [stdout]    |                                    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `docbot-derive` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "6d4fd848c08b2d29e9d0b6f97dbbf3c8dcde14f89c906268e9ef9754abc69162", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d4fd848c08b2d29e9d0b6f97dbbf3c8dcde14f89c906268e9ef9754abc69162", kill_on_drop: false }`
[INFO] [stdout] 6d4fd848c08b2d29e9d0b6f97dbbf3c8dcde14f89c906268e9ef9754abc69162
