[INFO] fetching crate opencontainers 0.0.0-alpha.2...
[INFO] documenting opencontainers-0.0.0-alpha.2 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate opencontainers 0.0.0-alpha.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate opencontainers 0.0.0-alpha.2 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate opencontainers 0.0.0-alpha.2
[INFO] finished tweaking crates.io crate opencontainers 0.0.0-alpha.2
[INFO] tweaked toml for crates.io crate opencontainers 0.0.0-alpha.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 784e4db10c08b2bd7c240ee461d8056be39ca32d2170679ff520b57e62f86b2b
[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" "784e4db10c08b2bd7c240ee461d8056be39ca32d2170679ff520b57e62f86b2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "784e4db10c08b2bd7c240ee461d8056be39ca32d2170679ff520b57e62f86b2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "784e4db10c08b2bd7c240ee461d8056be39ca32d2170679ff520b57e62f86b2b", kill_on_drop: false }`
[INFO] [stdout] 784e4db10c08b2bd7c240ee461d8056be39ca32d2170679ff520b57e62f86b2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 36216e50fd153e3bc3f11d81edcad9dea87facfcf75c955f248c2eb1babfff31
[INFO] running `Command { std: "docker" "start" "-a" "36216e50fd153e3bc3f11d81edcad9dea87facfcf75c955f248c2eb1babfff31", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking hyperx v0.13.2
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stderr]     Checking www-authenticate v0.3.0
[INFO] [stderr]  Documenting opencontainers v0.0.0-alpha.2 (/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(never_type)]
[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 `opencontainers`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name opencontainers 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-15afa0254f7a81d6.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-d9fcd1e065ee1e23.rmeta --extern hyperx=/opt/rustwide/target/debug/deps/libhyperx-75e268bc97941b75.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-958bf2a074a4960f.rmeta --extern pest=/opt/rustwide/target/debug/deps/libpest-dad74e028fc44105.rmeta --extern pest_derive=/opt/rustwide/target/debug/deps/libpest_derive-8535f6eff0d754e1.so --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-14b212605908820b.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-cf2a7db764a470fc.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-3af9a6345491720f.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-00b105e50b749454.rmeta --extern ttl_cache=/opt/rustwide/target/debug/deps/libttl_cache-c432e822c13c3323.rmeta --extern www_authenticate=/opt/rustwide/target/debug/deps/libwww_authenticate-bd148ba600da11e9.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "36216e50fd153e3bc3f11d81edcad9dea87facfcf75c955f248c2eb1babfff31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36216e50fd153e3bc3f11d81edcad9dea87facfcf75c955f248c2eb1babfff31", kill_on_drop: false }`
[INFO] [stdout] 36216e50fd153e3bc3f11d81edcad9dea87facfcf75c955f248c2eb1babfff31