[INFO] fetching crate fast-rustc-ap-rustc_index 1.0.0...
[INFO] documenting fast-rustc-ap-rustc_index-1.0.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate fast-rustc-ap-rustc_index 1.0.0 into /workspace/builds/worker-79/source
[INFO] validating manifest of crates.io crate fast-rustc-ap-rustc_index 1.0.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fast-rustc-ap-rustc_index 1.0.0
[INFO] finished tweaking crates.io crate fast-rustc-ap-rustc_index 1.0.0
[INFO] tweaked toml for crates.io crate fast-rustc-ap-rustc_index 1.0.0 written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba29c407adf86242ff77bef0ce8fae4d43dd2f647db4cf3e88314029eee5b711
[INFO] running `Command { std: "docker" "start" "-a" "ba29c407adf86242ff77bef0ce8fae4d43dd2f647db4cf3e88314029eee5b711", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba29c407adf86242ff77bef0ce8fae4d43dd2f647db4cf3e88314029eee5b711", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba29c407adf86242ff77bef0ce8fae4d43dd2f647db4cf3e88314029eee5b711", kill_on_drop: false }`
[INFO] [stdout] ba29c407adf86242ff77bef0ce8fae4d43dd2f647db4cf3e88314029eee5b711
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96f4f46bfcbb42d00e9154f1c0873e40c768c22d86321b6c86c938b1c5ac8a59
[INFO] running `Command { std: "docker" "start" "-a" "96f4f46bfcbb42d00e9154f1c0873e40c768c22d86321b6c86c938b1c5ac8a59", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-1.6.1/src/lib.rs:76:37
[INFO] [stdout]    |
[INFO] [stdout] 76 | #![cfg_attr(feature = "may_dangle", feature(dropck_eyepatch))]
[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 `smallvec` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "96f4f46bfcbb42d00e9154f1c0873e40c768c22d86321b6c86c938b1c5ac8a59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96f4f46bfcbb42d00e9154f1c0873e40c768c22d86321b6c86c938b1c5ac8a59", kill_on_drop: false }`
[INFO] [stdout] 96f4f46bfcbb42d00e9154f1c0873e40c768c22d86321b6c86c938b1c5ac8a59
