[INFO] fetching crate fast-rustc-ap-rustc_index 1.0.0...
[INFO] testing fast-rustc-ap-rustc_index-1.0.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate fast-rustc-ap-rustc_index 1.0.0 into /workspace/builds/worker-25/source
[INFO] validating manifest of crates.io crate fast-rustc-ap-rustc_index 1.0.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-25/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 800a0e8e56a74258c074a2c281bc275f3095ada6844665b3d94f04599a4eb5c4
[INFO] running `Command { std: "docker" "start" "-a" "800a0e8e56a74258c074a2c281bc275f3095ada6844665b3d94f04599a4eb5c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "800a0e8e56a74258c074a2c281bc275f3095ada6844665b3d94f04599a4eb5c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "800a0e8e56a74258c074a2c281bc275f3095ada6844665b3d94f04599a4eb5c4", kill_on_drop: false }`
[INFO] [stdout] 800a0e8e56a74258c074a2c281bc275f3095ada6844665b3d94f04599a4eb5c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3376c7d52b6c8198c75f5fd650e7c6f31100b0dea589b781d7fd8b21383a37ed
[INFO] running `Command { std: "docker" "start" "-a" "3376c7d52b6c8198c75f5fd650e7c6f31100b0dea589b781d7fd8b21383a37ed", kill_on_drop: false }`
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-1.8.0/src/lib.rs:83:37
[INFO] [stdout]    |
[INFO] [stdout] 83 | #![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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3376c7d52b6c8198c75f5fd650e7c6f31100b0dea589b781d7fd8b21383a37ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3376c7d52b6c8198c75f5fd650e7c6f31100b0dea589b781d7fd8b21383a37ed", kill_on_drop: false }`
[INFO] [stdout] 3376c7d52b6c8198c75f5fd650e7c6f31100b0dea589b781d7fd8b21383a37ed