[INFO] fetching crate pi_heap 0.1.0...
[INFO] documenting pi_heap-0.1.0 against 1.86.0 for beta-1.87-rustdoc-1
[INFO] extracting crate pi_heap 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate pi_heap 0.1.0 on toolchain 1.86.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.86.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pi_heap 0.1.0
[INFO] finished tweaking crates.io crate pi_heap 0.1.0
[INFO] tweaked toml for crates.io crate pi_heap 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.86.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.86.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pi_dyn_uint v0.1.0
[INFO] [stderr]   Downloaded pi_slab v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1.86.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db3d6cc4e227fe213ebad1799b8f9c4ef2f16f6e848c19ebba7d1b7946388be8
[INFO] running `Command { std: "docker" "start" "-a" "db3d6cc4e227fe213ebad1799b8f9c4ef2f16f6e848c19ebba7d1b7946388be8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db3d6cc4e227fe213ebad1799b8f9c4ef2f16f6e848c19ebba7d1b7946388be8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db3d6cc4e227fe213ebad1799b8f9c4ef2f16f6e848c19ebba7d1b7946388be8", kill_on_drop: false }`
[INFO] [stdout] db3d6cc4e227fe213ebad1799b8f9c4ef2f16f6e848c19ebba7d1b7946388be8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1.86.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1808341d10417e8fd77f3975336f3c80c85b599495072b652d5c11787073850b
[INFO] running `Command { std: "docker" "start" "-a" "1808341d10417e8fd77f3975336f3c80c85b599495072b652d5c11787073850b", kill_on_drop: false }`
[INFO] [stderr]     Checking pi_slab v0.1.0
[INFO] [stderr]     Checking pi_dyn_uint v0.1.0
[INFO] [stderr]  Documenting pi_heap v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `nll` has been stable since `1.63.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `pi_heap`
[INFO] running `Command { std: "docker" "inspect" "1808341d10417e8fd77f3975336f3c80c85b599495072b652d5c11787073850b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1808341d10417e8fd77f3975336f3c80c85b599495072b652d5c11787073850b", kill_on_drop: false }`
[INFO] [stdout] 1808341d10417e8fd77f3975336f3c80c85b599495072b652d5c11787073850b