[INFO] fetching crate ctrlgen-derive 0.3.2...
[INFO] documenting ctrlgen-derive-0.3.2 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate ctrlgen-derive 0.3.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate ctrlgen-derive 0.3.2 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ctrlgen-derive 0.3.2
[INFO] finished tweaking crates.io crate ctrlgen-derive 0.3.2
[INFO] tweaked toml for crates.io crate ctrlgen-derive 0.3.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ctrlgen-impl v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8808b9a0ab777f85b7537e97a3acacd20dbe8951220107f4f6bb72229cdaa491
[INFO] running `Command { std: "docker" "start" "-a" "8808b9a0ab777f85b7537e97a3acacd20dbe8951220107f4f6bb72229cdaa491", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8808b9a0ab777f85b7537e97a3acacd20dbe8951220107f4f6bb72229cdaa491", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8808b9a0ab777f85b7537e97a3acacd20dbe8951220107f4f6bb72229cdaa491", kill_on_drop: false }`
[INFO] [stdout] 8808b9a0ab777f85b7537e97a3acacd20dbe8951220107f4f6bb72229cdaa491
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5bb4d08c650ecd158c8b51cd8b9df4bdff85a9cdac94121e9c8a08beae415363
[INFO] running `Command { std: "docker" "start" "-a" "5bb4d08c650ecd158c8b51cd8b9df4bdff85a9cdac94121e9c8a08beae415363", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking convert_case v0.5.0
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking ctrlgen-impl v0.3.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/ctrlgen-impl-0.3.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_blocks)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ctrlgen-impl` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "5bb4d08c650ecd158c8b51cd8b9df4bdff85a9cdac94121e9c8a08beae415363", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bb4d08c650ecd158c8b51cd8b9df4bdff85a9cdac94121e9c8a08beae415363", kill_on_drop: false }`
[INFO] [stdout] 5bb4d08c650ecd158c8b51cd8b9df4bdff85a9cdac94121e9c8a08beae415363
