[INFO] fetching crate tari_comms_middleware 0.0.7...
[INFO] documenting tari_comms_middleware-0.0.7 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate tari_comms_middleware 0.0.7 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate tari_comms_middleware 0.0.7 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tari_comms_middleware 0.0.7
[INFO] finished tweaking crates.io crate tari_comms_middleware 0.0.7
[INFO] tweaked toml for crates.io crate tari_comms_middleware 0.0.7 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tari_utilities v0.1.2
[INFO] [stderr]   Downloaded tari_pubsub v0.0.7
[INFO] [stderr]   Downloaded tari_test_utils v0.0.10
[INFO] [stderr]   Downloaded tari_common v0.0.10
[INFO] [stderr]   Downloaded tari_shutdown v0.0.10
[INFO] [stderr]   Downloaded tari_broadcast_channel v0.0.7
[INFO] [stderr]   Downloaded tari_storage v0.0.10
[INFO] [stderr]   Downloaded tari_comms v0.0.10
[INFO] [stderr]   Downloaded tari_crypto v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e4eb7d705fe141aa5d1685057c020ec08527dc8c279eb85928148d3f512fbc4
[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" "6e4eb7d705fe141aa5d1685057c020ec08527dc8c279eb85928148d3f512fbc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e4eb7d705fe141aa5d1685057c020ec08527dc8c279eb85928148d3f512fbc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e4eb7d705fe141aa5d1685057c020ec08527dc8c279eb85928148d3f512fbc4", kill_on_drop: false }`
[INFO] [stdout] 6e4eb7d705fe141aa5d1685057c020ec08527dc8c279eb85928148d3f512fbc4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0fa4ecfe2e6b5de69cbce3271f4829c5c0f25202796bd4692434718ade92a262
[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" "0fa4ecfe2e6b5de69cbce3271f4829c5c0f25202796bd4692434718ade92a262", kill_on_drop: false }`
[INFO] [stderr]    Compiling packed_simd v0.3.3
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling keccak v0.1.0
[INFO] [stderr]    Compiling case v0.1.0
[INFO] [stderr]     Checking subtle v2.2.3
[INFO] [stderr]    Compiling traitobject v0.1.0
[INFO] [stderr]     Checking tower-layer v0.3.0
[INFO] [stderr]    Compiling unsigned-varint v0.3.3
[INFO] [stderr]     Checking newtype-ops v0.1.4
[INFO] [stderr]    Compiling data-encoding v2.3.0
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling c_linked_list v1.1.1
[INFO] [stderr]    Compiling bs58 v0.3.1
[INFO] [stderr]    Compiling antidote v1.0.0
[INFO] [stderr]    Compiling rust-ini v0.13.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/subtle-2.2.3/src/lib.rs:12:34
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![cfg_attr(feature = "nightly", feature(external_doc))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling log-mdc v0.1.0
[INFO] [stderr]    Compiling arc-swap v0.3.11
[INFO] [stderr]     Checking nohash-hasher v0.2.0
[INFO] [stderr]     Checking bitstring v0.1.1
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `subtle`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0fa4ecfe2e6b5de69cbce3271f4829c5c0f25202796bd4692434718ade92a262", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fa4ecfe2e6b5de69cbce3271f4829c5c0f25202796bd4692434718ade92a262", kill_on_drop: false }`
[INFO] [stdout] 0fa4ecfe2e6b5de69cbce3271f4829c5c0f25202796bd4692434718ade92a262