[INFO] fetching crate hdk_proc_macros 0.0.51-alpha1...
[INFO] documenting hdk_proc_macros-0.0.51-alpha1 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate hdk_proc_macros 0.0.51-alpha1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate hdk_proc_macros 0.0.51-alpha1 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 hdk_proc_macros 0.0.51-alpha1
[INFO] finished tweaking crates.io crate hdk_proc_macros 0.0.51-alpha1
[INFO] tweaked toml for crates.io crate hdk_proc_macros 0.0.51-alpha1 written to /workspace/builds/worker-1/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 96adaed4b74b59c399aa20735a10068e3d4805e79e60956f925bede420dd1573
[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" "96adaed4b74b59c399aa20735a10068e3d4805e79e60956f925bede420dd1573", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96adaed4b74b59c399aa20735a10068e3d4805e79e60956f925bede420dd1573", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96adaed4b74b59c399aa20735a10068e3d4805e79e60956f925bede420dd1573", kill_on_drop: false }`
[INFO] [stdout] 96adaed4b74b59c399aa20735a10068e3d4805e79e60956f925bede420dd1573
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stdout] 428629cedad759ccf7e13fe6105820d87e1829a699a7d69159d2aa02fda8603d
[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" "428629cedad759ccf7e13fe6105820d87e1829a699a7d69159d2aa02fda8603d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.31
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling regex v1.1.2
[INFO] [stderr]     Checking arrayref v0.3.5
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling proc-macro-hack-impl v0.4.2
[INFO] [stderr]     Checking sha1 v0.5.0
[INFO] [stderr]     Checking reed-solomon v0.2.1
[INFO] [stderr]    Compiling holochain_json_api v0.0.23
[INFO] [stderr]     Checking objekt v0.1.2
[INFO] [stderr]    Compiling holochain_persistence_api v0.0.18
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]     Checking memory_units v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]     Checking colored v1.7.0
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling backtrace v0.3.27
[INFO] [stderr]    Compiling backtrace-sys v0.1.37
[INFO] [stderr]     Checking proc-macro2 v0.4.27
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]     Checking parity-wasm v0.31.3
[INFO] [stderr]     Checking tiny-keccak v1.5.0
[INFO] [stderr]     Checking toml v0.5.0
[INFO] [stderr]     Checking hcid v0.0.6
[INFO] [stderr]     Checking url v2.1.0
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]     Checking uuid v0.7.1
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking serde_json v1.0.47
[INFO] [stderr]     Checking sha2 v0.7.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling proc-macro-hack v0.4.2
[INFO] [stderr]     Checking multihash v0.8.0
[INFO] [stderr]     Checking quote v0.6.11
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]    Compiling mashup-impl v0.1.12
[INFO] [stderr]     Checking rust-base58 v0.0.4
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]     Checking holochain_locksmith v0.0.51-alpha1
[INFO] [stderr]     Checking mashup v0.1.12
[INFO] [stderr]     Checking wasmi v0.4.4
[INFO] [stderr]     Checking env_logger v0.6.1
[INFO] [stderr]    Compiling holochain_core_types v0.0.51-alpha1
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling shrinkwraprs v0.2.1
[INFO] [stderr]     Checking holochain_logging v0.0.7
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling zeroize_derive v0.9.3
[INFO] [stderr]    Compiling holochain_json_derive v0.0.23
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/holochain_json_api-0.0.23/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/holochain_json_api-0.0.23/src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(never_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking zeroize v0.9.2
[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 compile `holochain_json_api`.
[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" "428629cedad759ccf7e13fe6105820d87e1829a699a7d69159d2aa02fda8603d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "428629cedad759ccf7e13fe6105820d87e1829a699a7d69159d2aa02fda8603d", kill_on_drop: false }`
[INFO] [stdout] 428629cedad759ccf7e13fe6105820d87e1829a699a7d69159d2aa02fda8603d