[INFO] fetching crate slabmalloc 0.11.0...
[INFO] documenting slabmalloc-0.11.0 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate slabmalloc 0.11.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate slabmalloc 0.11.0 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate slabmalloc 0.11.0
[INFO] finished tweaking crates.io crate slabmalloc 0.11.0
[INFO] tweaked toml for crates.io crate slabmalloc 0.11.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate slabmalloc 0.11.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spin v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:97d61d7686bf65f8ecb15491ab51835e82dc9176a96a831f143a431b191fc501" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25816c8d57d0d217a48a9fbe57294343cdeb005cd4a3d1d0aef58e35f31b0869
[INFO] running `Command { std: "docker" "start" "-a" "25816c8d57d0d217a48a9fbe57294343cdeb005cd4a3d1d0aef58e35f31b0869", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25816c8d57d0d217a48a9fbe57294343cdeb005cd4a3d1d0aef58e35f31b0869", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25816c8d57d0d217a48a9fbe57294343cdeb005cd4a3d1d0aef58e35f31b0869", kill_on_drop: false }`
[INFO] [stdout] 25816c8d57d0d217a48a9fbe57294343cdeb005cd4a3d1d0aef58e35f31b0869
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:97d61d7686bf65f8ecb15491ab51835e82dc9176a96a831f143a431b191fc501" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4d01605487e90125dfb108d40bc63fec39d8298e479c7112dd7d0a9654ec212
[INFO] running `Command { std: "docker" "start" "-a" "d4d01605487e90125dfb108d40bc63fec39d8298e479c7112dd7d0a9654ec212", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]  Documenting slabmalloc v0.11.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:21:35
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![cfg_attr(feature = "unstable", feature(const_mut_refs))]
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `slabmalloc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name slabmalloc src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="unstable"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=a87fee554515cfcc -L dependency=/opt/rustwide/target/debug/deps --extern log=/opt/rustwide/target/debug/deps/liblog-cfdf503dbcd0d4be.rmeta --cap-lints=warn --crate-version 0.11.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d4d01605487e90125dfb108d40bc63fec39d8298e479c7112dd7d0a9654ec212", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4d01605487e90125dfb108d40bc63fec39d8298e479c7112dd7d0a9654ec212", kill_on_drop: false }`
[INFO] [stdout] d4d01605487e90125dfb108d40bc63fec39d8298e479c7112dd7d0a9654ec212
