[INFO] fetching crate lockchain-core 0.9.0...
[INFO] documenting lockchain-core-0.9.0 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate lockchain-core 0.9.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate lockchain-core 0.9.0 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 lockchain-core 0.9.0
[INFO] finished tweaking crates.io crate lockchain-core 0.9.0
[INFO] tweaked toml for crates.io crate lockchain-core 0.9.0 written to /workspace/builds/worker-3/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] 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] cac13fda1219247dbbdb4f5e8a9259c8e14cd6044fc6dae2ea954b66044e506c
[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" "cac13fda1219247dbbdb4f5e8a9259c8e14cd6044fc6dae2ea954b66044e506c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cac13fda1219247dbbdb4f5e8a9259c8e14cd6044fc6dae2ea954b66044e506c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cac13fda1219247dbbdb4f5e8a9259c8e14cd6044fc6dae2ea954b66044e506c", kill_on_drop: false }`
[INFO] [stdout] cac13fda1219247dbbdb4f5e8a9259c8e14cd6044fc6dae2ea954b66044e506c
[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] e373c8f394f242dd5861820139ae4941cab1dd776a64b39dc8859e7c954f1baf
[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" "e373c8f394f242dd5861820139ae4941cab1dd776a64b39dc8859e7c954f1baf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]    Compiling pam-sys v0.5.6
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking safemem v0.3.3
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]    Compiling nix v0.11.1
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking users v0.5.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]     Checking block-cipher-trait v0.6.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking base64 v0.8.0
[INFO] [stderr]     Checking blowfish v0.4.0
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking digest v0.7.6
[INFO] [stderr]     Checking crypto-mac v0.6.2
[INFO] [stderr]     Checking crypto-mac v0.5.2
[INFO] [stderr]     Checking pam-auth v0.5.5
[INFO] [stderr]     Checking sha2 v0.7.1
[INFO] [stderr]     Checking hmac v0.6.3
[INFO] [stderr]     Checking blake2 v0.7.1
[INFO] [stderr]     Checking pbkdf2 v0.2.3
[INFO] [stderr]     Checking bcrypt v0.2.2
[INFO] [stderr]     Checking keybob v0.3.1
[INFO] [stderr]  Documenting lockchain-core v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(external_doc)]
[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 `lockchain-core`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name lockchain_core 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 base64=/opt/rustwide/target/debug/deps/libbase64-611e8bed1395112b.rmeta --extern bcrypt=/opt/rustwide/target/debug/deps/libbcrypt-b359bce57054891f.rmeta --extern blake2=/opt/rustwide/target/debug/deps/libblake2-71ee3b9c5c29917b.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-adc7095fc110dda4.rmeta --extern keybob=/opt/rustwide/target/debug/deps/libkeybob-9121cfe603c19240.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-743e8c6a01907273.rmeta --extern pam_auth=/opt/rustwide/target/debug/deps/libpam_auth-0bbb5070444b7e44.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-551a9034803245e9.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-eb6cdf579abc545a.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-5f078a3096470b53.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-1aecc52d37c4e52d.rmeta --cap-lints=warn --crate-version 0.9.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "e373c8f394f242dd5861820139ae4941cab1dd776a64b39dc8859e7c954f1baf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e373c8f394f242dd5861820139ae4941cab1dd776a64b39dc8859e7c954f1baf", kill_on_drop: false }`
[INFO] [stdout] e373c8f394f242dd5861820139ae4941cab1dd776a64b39dc8859e7c954f1baf
