[INFO] fetching crate holochain_conductor_lib_api 0.0.51-alpha1...
[INFO] testing holochain_conductor_lib_api-0.0.51-alpha1 against 1.45.2 for beta-1.46-1
[INFO] extracting crate holochain_conductor_lib_api 0.0.51-alpha1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate holochain_conductor_lib_api 0.0.51-alpha1 on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate holochain_conductor_lib_api 0.0.51-alpha1
[INFO] finished tweaking crates.io crate holochain_conductor_lib_api 0.0.51-alpha1
[INFO] tweaked toml for crates.io crate holochain_conductor_lib_api 0.0.51-alpha1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e13e0f1e389ad4d5429f1e9d867c99cb676c7a8294cfb635957a6f4c565a151
[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" "3e13e0f1e389ad4d5429f1e9d867c99cb676c7a8294cfb635957a6f4c565a151", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e13e0f1e389ad4d5429f1e9d867c99cb676c7a8294cfb635957a6f4c565a151", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e13e0f1e389ad4d5429f1e9d867c99cb676c7a8294cfb635957a6f4c565a151", kill_on_drop: false }`
[INFO] [stdout] 3e13e0f1e389ad4d5429f1e9d867c99cb676c7a8294cfb635957a6f4c565a151
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--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] b0407191d9b21e8d9eaa71e90a65d9b7c7c9e0346ad1a7c9b9db9f5deaa59894
[INFO] running `Command { std: "docker" "start" "-a" "b0407191d9b21e8d9eaa71e90a65d9b7c7c9e0346ad1a7c9b9db9f5deaa59894", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling syn v0.15.31
[INFO] [stderr]    Compiling protobuf v2.14.0
[INFO] [stderr]    Compiling prometheus v0.7.0
[INFO] [stderr]    Compiling integer-encoding v1.1.5
[INFO] [stderr]    Compiling tracing-core v0.1.10
[INFO] [stderr]    Compiling sharded-slab v0.0.8
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling directories v1.0.2
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling mashup-impl v0.1.12
[INFO] [stderr]    Compiling ordered-float v1.1.0
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling holochain_core_types v0.0.51-alpha1
[INFO] [stderr]    Compiling holochain_common v0.0.51-alpha1
[INFO] [stderr]    Compiling mashup v0.1.12
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling zeroize_derive v0.9.3
[INFO] [stderr]    Compiling zeroize v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling trackable_derive v0.1.3
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.9
[INFO] [stderr]    Compiling shrinkwraprs v0.3.0
[INFO] [stderr]    Compiling trackable v0.2.23
[INFO] [stderr]    Compiling rustracing v0.2.1
[INFO] [stderr]    Compiling thrift_codec v0.1.1
[INFO] [stderr]    Compiling rustracing_jaeger v0.2.1
[INFO] [stderr]    Compiling tracing v0.1.13
[INFO] [stderr]    Compiling pin-project v0.4.23
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling futures-executor v0.3.5
[INFO] [stderr]    Compiling futures v0.3.5
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling serde_json v1.0.47
[INFO] [stderr]    Compiling bincode v1.3.1
[INFO] [stderr]    Compiling toml v0.5.0
[INFO] [stderr]    Compiling tracing-serde v0.1.1
[INFO] [stderr]    Compiling lib3h_crypto_api v0.0.42
[INFO] [stderr]    Compiling tracing-log v0.1.1
[INFO] [stderr]    Compiling thrift v0.13.0
[INFO] [stderr]    Compiling holochain_locksmith v0.0.51-alpha1
[INFO] [stderr]    Compiling opentelemetry v0.2.0
[INFO] [stderr]    Compiling holochain_logging v0.0.7
[INFO] [stderr]    Compiling tracing-subscriber v0.2.3
[INFO] [stderr]    Compiling jsonrpc-lite v0.5.0
[INFO] [stderr]    Compiling jsonrpc-core v14.0.1
[INFO] [stderr]    Compiling holochain_json_derive v0.0.23
[INFO] [stderr]    Compiling opentelemetry-jaeger v0.1.0
[INFO] [stderr]    Compiling holochain_json_api 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] [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" "b0407191d9b21e8d9eaa71e90a65d9b7c7c9e0346ad1a7c9b9db9f5deaa59894", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0407191d9b21e8d9eaa71e90a65d9b7c7c9e0346ad1a7c9b9db9f5deaa59894", kill_on_drop: false }`
[INFO] [stdout] b0407191d9b21e8d9eaa71e90a65d9b7c7c9e0346ad1a7c9b9db9f5deaa59894