[INFO] fetching crate overflow-error 0.4.1...
[INFO] documenting overflow-error-0.4.1 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate overflow-error 0.4.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate overflow-error 0.4.1 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate overflow-error 0.4.1
[INFO] finished tweaking crates.io crate overflow-error 0.4.1
[INFO] tweaked toml for crates.io crate overflow-error 0.4.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6629f4e0bc40da750935dd142e70525f1817ed8fa6aa78dd2b63b3fb9b530e5a
[INFO] running `Command { std: "docker" "start" "-a" "6629f4e0bc40da750935dd142e70525f1817ed8fa6aa78dd2b63b3fb9b530e5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6629f4e0bc40da750935dd142e70525f1817ed8fa6aa78dd2b63b3fb9b530e5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6629f4e0bc40da750935dd142e70525f1817ed8fa6aa78dd2b63b3fb9b530e5a", kill_on_drop: false }`
[INFO] [stdout] 6629f4e0bc40da750935dd142e70525f1817ed8fa6aa78dd2b63b3fb9b530e5a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df35afc6e6e54ca4937d320023cb8c4cf359d132c25240b2897850f90a70c5ca
[INFO] running `Command { std: "docker" "start" "-a" "df35afc6e6e54ca4937d320023cb8c4cf359d132c25240b2897850f90a70c5ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking miniz_oxide v0.5.1
[INFO] [stderr]    Compiling backtrace v0.3.65
[INFO] [stderr]     Checking object v0.28.4
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]  Documenting overflow-error v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(never_type)]
[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 `overflow-error`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name overflow_error src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="std"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=96c81bafd06b96cb -L dependency=/opt/rustwide/target/debug/deps --extern failure=/opt/rustwide/target/debug/deps/libfailure-0e24272d2761475e.rmeta --cap-lints=warn --crate-version 0.4.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "df35afc6e6e54ca4937d320023cb8c4cf359d132c25240b2897850f90a70c5ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df35afc6e6e54ca4937d320023cb8c4cf359d132c25240b2897850f90a70c5ca", kill_on_drop: false }`
[INFO] [stdout] df35afc6e6e54ca4937d320023cb8c4cf359d132c25240b2897850f90a70c5ca