[INFO] fetching crate boomerang_derive 0.1.0...
[INFO] documenting boomerang_derive-0.1.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate boomerang_derive 0.1.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate boomerang_derive 0.1.0 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 boomerang_derive 0.1.0
[INFO] finished tweaking crates.io crate boomerang_derive 0.1.0
[INFO] tweaked toml for crates.io crate boomerang_derive 0.1.0 written to /workspace/builds/worker-10/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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 6f82a6337ebcb458ba7ff34067e730fe5dfc26aaa5d40958d53a12d4168ade58
[INFO] running `Command { std: "docker" "start" "-a" "6f82a6337ebcb458ba7ff34067e730fe5dfc26aaa5d40958d53a12d4168ade58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f82a6337ebcb458ba7ff34067e730fe5dfc26aaa5d40958d53a12d4168ade58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f82a6337ebcb458ba7ff34067e730fe5dfc26aaa5d40958d53a12d4168ade58", kill_on_drop: false }`
[INFO] [stdout] 6f82a6337ebcb458ba7ff34067e730fe5dfc26aaa5d40958d53a12d4168ade58
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 1ce2ada2efa6a40e26ea2a3c724ded6cad9dbef1c0b60ab47da9272ae83ca9b9
[INFO] running `Command { std: "docker" "start" "-a" "1ce2ada2efa6a40e26ea2a3c724ded6cad9dbef1c0b60ab47da9272ae83ca9b9", kill_on_drop: false }`
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking syn v1.0.74
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]     Checking parse_duration v2.1.1
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]     Checking darling v0.10.2
[INFO] [stderr]  Documenting boomerang_derive v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(hash_set_entry)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `boomerang_derive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name boomerang_derive src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern darling=/opt/rustwide/target/debug/deps/libdarling-bce4d919f9bb77f2.rmeta --extern derive_more=/opt/rustwide/target/debug/deps/libderive_more-b27743f99fd2d11d.so --extern parse_duration=/opt/rustwide/target/debug/deps/libparse_duration-f8f0547039ec27da.rmeta --extern petgraph=/opt/rustwide/target/debug/deps/libpetgraph-d3027bf2c467ee3b.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-c395b40247ac8d91.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-901816f2d165e43f.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-048239a2ecaf741d.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1ce2ada2efa6a40e26ea2a3c724ded6cad9dbef1c0b60ab47da9272ae83ca9b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ce2ada2efa6a40e26ea2a3c724ded6cad9dbef1c0b60ab47da9272ae83ca9b9", kill_on_drop: false }`
[INFO] [stdout] 1ce2ada2efa6a40e26ea2a3c724ded6cad9dbef1c0b60ab47da9272ae83ca9b9
