[INFO] fetching crate tdn 0.2.0...
[INFO] documenting tdn-0.2.0 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate tdn 0.2.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate tdn 0.2.0 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 tdn 0.2.0
[INFO] finished tweaking crates.io crate tdn 0.2.0
[INFO] tweaked toml for crates.io crate tdn 0.2.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate tdn 0.2.0 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-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" "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] 09a3aea488a31b81bf632c3dad20886d89b7c75478d782e21c599d0f3c385613
[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" "09a3aea488a31b81bf632c3dad20886d89b7c75478d782e21c599d0f3c385613", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09a3aea488a31b81bf632c3dad20886d89b7c75478d782e21c599d0f3c385613", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09a3aea488a31b81bf632c3dad20886d89b7c75478d782e21c599d0f3c385613", kill_on_drop: false }`
[INFO] [stdout] 09a3aea488a31b81bf632c3dad20886d89b7c75478d782e21c599d0f3c385613
[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" "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] 62c6155816ac254b20eaadeaf18d140aa6fadc2ddbfab471ad3aba3e6debb0ad
[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" "62c6155816ac254b20eaadeaf18d140aa6fadc2ddbfab471ad3aba3e6debb0ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]     Checking postcard-cobs v0.1.5-pre
[INFO] [stderr]     Checking bit-vec v0.6.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking block-cipher v0.8.0
[INFO] [stderr]     Checking polling v1.0.2
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking futures-lite v1.4.0
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking block-modes v0.6.1
[INFO] [stderr]     Checking aes-soft v0.5.0
[INFO] [stderr]     Checking tungstenite v0.10.1
[INFO] [stderr]     Checking sha3 v0.9.1
[INFO] [stderr]     Checking sha2 v0.9.1
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking sled v0.34.4
[INFO] [stderr]     Checking async-io v1.1.1
[INFO] [stderr]     Checking blocking v1.0.0
[INFO] [stderr]     Checking async-executor v1.1.1
[INFO] [stderr]    Compiling zeroize_derive v1.0.1
[INFO] [stderr]     Checking async-fs v1.3.0
[INFO] [stderr]     Checking async-process v1.0.0
[INFO] [stderr]     Checking async-net v1.3.0
[INFO] [stderr]     Checking smol v1.0.1
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking zeroize v1.1.1
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking curve25519-dalek v3.0.0
[INFO] [stderr]     Checking x25519-dalek v1.1.0
[INFO] [stderr]     Checking chamomile_types v0.2.0
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking postcard v0.5.1
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking ed25519-dalek v1.0.0
[INFO] [stderr]     Checking rckad v0.0.6
[INFO] [stderr]     Checking tdn_types v0.2.0
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking async-tungstenite v0.4.2
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking chamomile v0.2.0
[INFO] [stderr]  Documenting tdn v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(associated_type_defaults)]
[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 `tdn`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name tdn src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="dev"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern async_tungstenite=/opt/rustwide/target/debug/deps/libasync_tungstenite-4bdc240176a0fe3d.rmeta --extern chamomile=/opt/rustwide/target/debug/deps/libchamomile-f2e31a5c4ddf65a0.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-bcc4a92ba0e06d73.rmeta --extern httparse=/opt/rustwide/target/debug/deps/libhttparse-adaa20c6f51a9625.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-4d9b6dc7228ae14f.rmeta --extern mime=/opt/rustwide/target/debug/deps/libmime-aa2d6f096d1bf067.rmeta --extern postcard=/opt/rustwide/target/debug/deps/libpostcard-f12a2d48bfdb95c5.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-6b44aeba240099bf.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-64f024a7e6e49686.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-08a80f67d367aca0.rmeta --extern smol=/opt/rustwide/target/debug/deps/libsmol-96ac130c078030e1.rmeta --extern tdn_types=/opt/rustwide/target/debug/deps/libtdn_types-85a4304e3a6cadc1.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-fa981328cddd9aa3.rmeta --cap-lints=warn --crate-version 0.2.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "62c6155816ac254b20eaadeaf18d140aa6fadc2ddbfab471ad3aba3e6debb0ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62c6155816ac254b20eaadeaf18d140aa6fadc2ddbfab471ad3aba3e6debb0ad", kill_on_drop: false }`
[INFO] [stdout] 62c6155816ac254b20eaadeaf18d140aa6fadc2ddbfab471ad3aba3e6debb0ad
