[INFO] fetching crate leapfrog 0.3.0...
[INFO] documenting leapfrog-0.3.0 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate leapfrog 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate leapfrog 0.3.0 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate leapfrog 0.3.0
[INFO] finished tweaking crates.io crate leapfrog 0.3.0
[INFO] tweaked toml for crates.io crate leapfrog 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c55483bc2e8d1e88eed86f208c8a8373782116065e143f54b39a1b2352ab866
[INFO] running `Command { std: "docker" "start" "-a" "8c55483bc2e8d1e88eed86f208c8a8373782116065e143f54b39a1b2352ab866", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c55483bc2e8d1e88eed86f208c8a8373782116065e143f54b39a1b2352ab866", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c55483bc2e8d1e88eed86f208c8a8373782116065e143f54b39a1b2352ab866", kill_on_drop: false }`
[INFO] [stdout] 8c55483bc2e8d1e88eed86f208c8a8373782116065e143f54b39a1b2352ab866
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eb528aba4563c1f2cae6417ee8667fffc17ba26621d2bbd6bd193bf614d49bc1
[INFO] running `Command { std: "docker" "start" "-a" "eb528aba4563c1f2cae6417ee8667fffc17ba26621d2bbd6bd193bf614d49bc1", kill_on_drop: false }`
[INFO] [stderr]     Checking atomic v0.5.3
[INFO] [stderr]  Documenting leapfrog v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:153:52
[INFO] [stdout]     |
[INFO] [stdout] 153 | #![cfg_attr(not(feature = "stable_alloc"), feature(allocator_api))]
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `LeapMap`
[INFO] [stdout]   --> src/hashmap.rs:46:42
[INFO] [stdout]    |
[INFO] [stdout] 46 | /// This version is *not* thread-safe. [`LeapMap`] is a thread-safe version of
[INFO] [stdout]    |                                          ^^^^^^^ no item named `LeapMap` in scope
[INFO] [stdout]    |
[INFO] [stdout]    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout]    = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `leapfrog`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name leapfrog src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=137bf9b9d17c27dd -L dependency=/opt/rustwide/target/debug/deps --extern atomic=/opt/rustwide/target/debug/deps/libatomic-a30c20bf548c4395.rmeta --cap-lints=warn --crate-version 0.3.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "eb528aba4563c1f2cae6417ee8667fffc17ba26621d2bbd6bd193bf614d49bc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb528aba4563c1f2cae6417ee8667fffc17ba26621d2bbd6bd193bf614d49bc1", kill_on_drop: false }`
[INFO] [stdout] eb528aba4563c1f2cae6417ee8667fffc17ba26621d2bbd6bd193bf614d49bc1
