[INFO] fetching crate minutae 0.2.2...
[INFO] documenting minutae-0.2.2 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate minutae 0.2.2 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate minutae 0.2.2 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate minutae 0.2.2
[INFO] finished tweaking crates.io crate minutae 0.2.2
[INFO] tweaked toml for crates.io crate minutae 0.2.2 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2e4bceb38c43ce91b75affc6c00d594e3f0d7a92216d6d577bfb70c10deeeb38
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2e4bceb38c43ce91b75affc6c00d594e3f0d7a92216d6d577bfb70c10deeeb38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e4bceb38c43ce91b75affc6c00d594e3f0d7a92216d6d577bfb70c10deeeb38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e4bceb38c43ce91b75affc6c00d594e3f0d7a92216d6d577bfb70c10deeeb38", kill_on_drop: false }`
[INFO] [stdout] 2e4bceb38c43ce91b75affc6c00d594e3f0d7a92216d6d577bfb70c10deeeb38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8e39964500542db4c8243486f259f67e4de06de1791dd49d2127761a1c7ad79
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c8e39964500542db4c8243486f259f67e4de06de1791dd49d2127761a1c7ad79", kill_on_drop: false }`
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]  Documenting minutae v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(conservative_impl_trait, test)]
[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 `minutae`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name minutae src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-377b7f3767757d66.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-71682548be81a06e.rmeta --cap-lints=warn --crate-version 0.2.2` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "c8e39964500542db4c8243486f259f67e4de06de1791dd49d2127761a1c7ad79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8e39964500542db4c8243486f259f67e4de06de1791dd49d2127761a1c7ad79", kill_on_drop: false }`
[INFO] [stdout] c8e39964500542db4c8243486f259f67e4de06de1791dd49d2127761a1c7ad79
