[INFO] fetching crate kg-diag-derive 0.4.0...
[INFO] documenting kg-diag-derive-0.4.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate kg-diag-derive 0.4.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate kg-diag-derive 0.4.0 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 kg-diag-derive 0.4.0
[INFO] finished tweaking crates.io crate kg-diag-derive 0.4.0
[INFO] tweaked toml for crates.io crate kg-diag-derive 0.4.0 written to /workspace/builds/worker-6/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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 21f456f9f237598a952dbc73455153dd26c357b059caac274ad47faf0f812f11
[INFO] running `Command { std: "docker" "start" "-a" "21f456f9f237598a952dbc73455153dd26c357b059caac274ad47faf0f812f11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21f456f9f237598a952dbc73455153dd26c357b059caac274ad47faf0f812f11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21f456f9f237598a952dbc73455153dd26c357b059caac274ad47faf0f812f11", kill_on_drop: false }`
[INFO] [stdout] 21f456f9f237598a952dbc73455153dd26c357b059caac274ad47faf0f812f11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] d53a7fa7d7d9616be292c688cd3792af216c4f71bc1cc35b4d83546b5abf0258
[INFO] running `Command { std: "docker" "start" "-a" "d53a7fa7d7d9616be292c688cd3792af216c4f71bc1cc35b4d83546b5abf0258", 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] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling heapsize v0.4.2
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking object v0.26.0
[INFO] [stderr]     Checking nom v5.1.2
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling kg-utils v0.2.4
[INFO] [stderr]     Checking quote v1.0.9
[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/kg-utils-0.2.4/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api, alloc_layout_extra, test)]
[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 `kg-utils`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d53a7fa7d7d9616be292c688cd3792af216c4f71bc1cc35b4d83546b5abf0258", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d53a7fa7d7d9616be292c688cd3792af216c4f71bc1cc35b4d83546b5abf0258", kill_on_drop: false }`
[INFO] [stdout] d53a7fa7d7d9616be292c688cd3792af216c4f71bc1cc35b4d83546b5abf0258
