[INFO] fetching crate writedown-html 0.1.0...
[INFO] documenting writedown-html-0.1.0 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate writedown-html 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate writedown-html 0.1.0 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 writedown-html 0.1.0
[INFO] finished tweaking crates.io crate writedown-html 0.1.0
[INFO] tweaked toml for crates.io crate writedown-html 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate writedown-html 0.1.0 already has a lockfile, it will not be regenerated
[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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded writedown v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 324b974d0cb84e66e64d5bcaf2d904969046e0e6f4901aa5a9faab527bf05a32
[INFO] running `Command { std: "docker" "start" "-a" "324b974d0cb84e66e64d5bcaf2d904969046e0e6f4901aa5a9faab527bf05a32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "324b974d0cb84e66e64d5bcaf2d904969046e0e6f4901aa5a9faab527bf05a32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "324b974d0cb84e66e64d5bcaf2d904969046e0e6f4901aa5a9faab527bf05a32", kill_on_drop: false }`
[INFO] [stdout] 324b974d0cb84e66e64d5bcaf2d904969046e0e6f4901aa5a9faab527bf05a32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b79c5639ab823b761ed266aa3ca2de8d6bbed01f00a390a90f92a3e3d7d91cdb
[INFO] running `Command { std: "docker" "start" "-a" "b79c5639ab823b761ed266aa3ca2de8d6bbed01f00a390a90f92a3e3d7d91cdb", kill_on_drop: false }`
[INFO] [stderr]     Checking writedown 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/writedown-0.1.0/src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(assert_matches)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 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 `writedown` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b79c5639ab823b761ed266aa3ca2de8d6bbed01f00a390a90f92a3e3d7d91cdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b79c5639ab823b761ed266aa3ca2de8d6bbed01f00a390a90f92a3e3d7d91cdb", kill_on_drop: false }`
[INFO] [stdout] b79c5639ab823b761ed266aa3ca2de8d6bbed01f00a390a90f92a3e3d7d91cdb
