[INFO] fetching crate const-buffer 0.1.2...
[INFO] documenting const-buffer-0.1.2 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate const-buffer 0.1.2 into /workspace/builds/worker-54/source
[INFO] validating manifest of crates.io crate const-buffer 0.1.2 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate const-buffer 0.1.2
[INFO] finished tweaking crates.io crate const-buffer 0.1.2
[INFO] tweaked toml for crates.io crate const-buffer 0.1.2 written to /workspace/builds/worker-54/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f2791086a41d0c53d7b2fb926aa9abf7646f5d59fe79c452b683fc8a6652dee
[INFO] running `Command { std: "docker" "start" "-a" "2f2791086a41d0c53d7b2fb926aa9abf7646f5d59fe79c452b683fc8a6652dee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f2791086a41d0c53d7b2fb926aa9abf7646f5d59fe79c452b683fc8a6652dee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f2791086a41d0c53d7b2fb926aa9abf7646f5d59fe79c452b683fc8a6652dee", kill_on_drop: false }`
[INFO] [stdout] 2f2791086a41d0c53d7b2fb926aa9abf7646f5d59fe79c452b683fc8a6652dee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bdd9db705ca8f5d6e9b21c3f497fc2c33c0f376b04df6ba81b26e4a6b466b502
[INFO] running `Command { std: "docker" "start" "-a" "bdd9db705ca8f5d6e9b21c3f497fc2c33c0f376b04df6ba81b26e4a6b466b502", kill_on_drop: false }`
[INFO] [stderr]  Documenting const-buffer v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:62:1
[INFO] [stdout]    |
[INFO] [stdout] 62 | / #![feature(
[INFO] [stdout] 63 | |     associated_type_bounds,
[INFO] [stdout] 64 | |     const_fn_union,
[INFO] [stdout] 65 | |     min_const_generics,
[INFO] [stdout] ...  |
[INFO] [stdout] 70 | |     untagged_unions
[INFO] [stdout] 71 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_fn_union` has been stable since 1.56.0 and no longer requires an attribute to enable
[INFO] [stdout]    = help: the feature `min_const_generics` has been stable since 1.51.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `const-buffer`
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name const_buffer src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=836fd580b6efac74 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "bdd9db705ca8f5d6e9b21c3f497fc2c33c0f376b04df6ba81b26e4a6b466b502", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdd9db705ca8f5d6e9b21c3f497fc2c33c0f376b04df6ba81b26e4a6b466b502", kill_on_drop: false }`
[INFO] [stdout] bdd9db705ca8f5d6e9b21c3f497fc2c33c0f376b04df6ba81b26e4a6b466b502