[INFO] fetching crate uuid_v1_variant 0.1.4...
[INFO] documenting uuid_v1_variant-0.1.4 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate uuid_v1_variant 0.1.4 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate uuid_v1_variant 0.1.4 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate uuid_v1_variant 0.1.4
[INFO] finished tweaking crates.io crate uuid_v1_variant 0.1.4
[INFO] tweaked toml for crates.io crate uuid_v1_variant 0.1.4 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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" "+1.54.0" "fetch" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded eui48 v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e40cf3967724e620c8c0e13ee6ad9fbd218d2db3b24b0abd1bd0da203e9535de
[INFO] running `Command { std: "docker" "start" "-a" "e40cf3967724e620c8c0e13ee6ad9fbd218d2db3b24b0abd1bd0da203e9535de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e40cf3967724e620c8c0e13ee6ad9fbd218d2db3b24b0abd1bd0da203e9535de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e40cf3967724e620c8c0e13ee6ad9fbd218d2db3b24b0abd1bd0da203e9535de", kill_on_drop: false }`
[INFO] [stdout] e40cf3967724e620c8c0e13ee6ad9fbd218d2db3b24b0abd1bd0da203e9535de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23e1a3c877a2a205d504db5025720b19c01b890aa1ca88973a1d6c99c0d10235
[INFO] running `Command { std: "docker" "start" "-a" "23e1a3c877a2a205d504db5025720b19c01b890aa1ca88973a1d6c99c0d10235", kill_on_drop: false }`
[INFO] [stderr]     Checking eui48 v0.3.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]  Documenting uuid_v1_variant v0.1.4 (/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(libc)]
[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 `uuid_v1_variant`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type staticlib --crate-type lib --crate-name uuid_v1_variant 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 eui48=/opt/rustwide/target/debug/deps/libeui48-c07cab7f115e045b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-577ffa6562df8c78.rmeta --extern rustc_serialize=/opt/rustwide/target/debug/deps/librustc_serialize-67e30c758e0c56b4.rmeta --cap-lints=warn --crate-version 0.1.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "23e1a3c877a2a205d504db5025720b19c01b890aa1ca88973a1d6c99c0d10235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23e1a3c877a2a205d504db5025720b19c01b890aa1ca88973a1d6c99c0d10235", kill_on_drop: false }`
[INFO] [stdout] 23e1a3c877a2a205d504db5025720b19c01b890aa1ca88973a1d6c99c0d10235
