[INFO] fetching crate cortex-a 6.0.0...
[INFO] documenting cortex-a-6.0.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate cortex-a 6.0.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate cortex-a 6.0.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cortex-a 6.0.0
[INFO] finished tweaking crates.io crate cortex-a 6.0.0
[INFO] tweaked toml for crates.io crate cortex-a 6.0.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96fe5a915d88aee783ed9274fe147adb512755e1e9ec7dceeeef93968e3dbeb4
[INFO] running `Command { std: "docker" "start" "-a" "96fe5a915d88aee783ed9274fe147adb512755e1e9ec7dceeeef93968e3dbeb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96fe5a915d88aee783ed9274fe147adb512755e1e9ec7dceeeef93968e3dbeb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96fe5a915d88aee783ed9274fe147adb512755e1e9ec7dceeeef93968e3dbeb4", kill_on_drop: false }`
[INFO] [stdout] 96fe5a915d88aee783ed9274fe147adb512755e1e9ec7dceeeef93968e3dbeb4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49f5ba1123b3263de6eedd159d858d5825eed6fb56efa23a48685a42eb6db677
[INFO] running `Command { std: "docker" "start" "-a" "49f5ba1123b3263de6eedd159d858d5825eed6fb56efa23a48685a42eb6db677", kill_on_drop: false }`
[INFO] [stderr]     Checking tock-registers v0.7.0
[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/tock-registers-0.7.0/src/lib.rs:56:1
[INFO] [stdout]    |
[INFO] [stdout] 56 | #![feature(const_fn_trait_bound)]
[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 `tock-registers`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "49f5ba1123b3263de6eedd159d858d5825eed6fb56efa23a48685a42eb6db677", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49f5ba1123b3263de6eedd159d858d5825eed6fb56efa23a48685a42eb6db677", kill_on_drop: false }`
[INFO] [stdout] 49f5ba1123b3263de6eedd159d858d5825eed6fb56efa23a48685a42eb6db677
