[INFO] fetching crate notes 0.2.108...
[INFO] documenting notes-0.2.108 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate notes 0.2.108 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate notes 0.2.108 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 notes 0.2.108
[INFO] finished tweaking crates.io crate notes 0.2.108
[INFO] tweaked toml for crates.io crate notes 0.2.108 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate notes 0.2.108 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] bf54606a14959cfe3d2317d2aed06d2a7632d16eb5a22a443bf9970ef6ac6f19
[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" "bf54606a14959cfe3d2317d2aed06d2a7632d16eb5a22a443bf9970ef6ac6f19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf54606a14959cfe3d2317d2aed06d2a7632d16eb5a22a443bf9970ef6ac6f19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf54606a14959cfe3d2317d2aed06d2a7632d16eb5a22a443bf9970ef6ac6f19", kill_on_drop: false }`
[INFO] [stdout] bf54606a14959cfe3d2317d2aed06d2a7632d16eb5a22a443bf9970ef6ac6f19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 3920eb9a5a49ff20f8008c93d5fd849a508775afb734a905e883a1fc22536c89
[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" "3920eb9a5a49ff20f8008c93d5fd849a508775afb734a905e883a1fc22536c89", kill_on_drop: false }`
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]  Documenting notes v0.2.108 (/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(backtrace)]
[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 `notes`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name notes 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 chrono=/opt/rustwide/target/debug/deps/libchrono-e027487642711674.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-01cfab8e0f4cc93d.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-e937ea68a5b41f34.rmeta --extern dirs=/opt/rustwide/target/debug/deps/libdirs-4ae5f1a94eb26dd9.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-72923b2d9aa06af7.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-0879519133e6417a.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-198cefe7de12a9ad.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-9a5e958e1e09d86e.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-35cbba2d5b8a0a7f.rmeta --cap-lints=warn --crate-version 0.2.108` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "3920eb9a5a49ff20f8008c93d5fd849a508775afb734a905e883a1fc22536c89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3920eb9a5a49ff20f8008c93d5fd849a508775afb734a905e883a1fc22536c89", kill_on_drop: false }`
[INFO] [stdout] 3920eb9a5a49ff20f8008c93d5fd849a508775afb734a905e883a1fc22536c89
