[INFO] fetching crate cvec 0.1.0...
[INFO] documenting cvec-0.1.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate cvec 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate cvec 0.1.0 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 cvec 0.1.0
[INFO] finished tweaking crates.io crate cvec 0.1.0
[INFO] tweaked toml for crates.io crate cvec 0.1.0 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" "+1.75.0" "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 coption v0.1.0
[INFO] [stderr]   Downloaded syn-helpers v0.4.5
[INFO] [stderr]   Downloaded either_n v0.2.0
[INFO] [stderr]   Downloaded self-rust-tokenize v0.3.3
[INFO] [stderr]   Downloaded self-rust-tokenize-derive v0.3.3
[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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb9a81a0505bf6b90844c2b848259858b75c6e677e89097e03717f07385c6a56
[INFO] running `Command { std: "docker" "start" "-a" "eb9a81a0505bf6b90844c2b848259858b75c6e677e89097e03717f07385c6a56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb9a81a0505bf6b90844c2b848259858b75c6e677e89097e03717f07385c6a56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb9a81a0505bf6b90844c2b848259858b75c6e677e89097e03717f07385c6a56", kill_on_drop: false }`
[INFO] [stdout] eb9a81a0505bf6b90844c2b848259858b75c6e677e89097e03717f07385c6a56
[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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70aa9ebaa2b46abfe4c23e5681e69d9c6d15d22c53bf819881df16b45c19ce27
[INFO] running `Command { std: "docker" "start" "-a" "70aa9ebaa2b46abfe4c23e5681e69d9c6d15d22c53bf819881df16b45c19ce27", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling either_n v0.2.0
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]    Compiling syn-helpers v0.4.5
[INFO] [stderr]    Compiling self-rust-tokenize-derive v0.3.3
[INFO] [stderr]     Checking self-rust-tokenize v0.3.3
[INFO] [stderr]     Checking coption v0.1.0
[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/coption-0.1.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(adt_const_params)]
[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 `coption` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "70aa9ebaa2b46abfe4c23e5681e69d9c6d15d22c53bf819881df16b45c19ce27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70aa9ebaa2b46abfe4c23e5681e69d9c6d15d22c53bf819881df16b45c19ce27", kill_on_drop: false }`
[INFO] [stdout] 70aa9ebaa2b46abfe4c23e5681e69d9c6d15d22c53bf819881df16b45c19ce27
