[INFO] fetching crate coap-message-demos 0.1.0...
[INFO] testing coap-message-demos-0.1.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate coap-message-demos 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate coap-message-demos 0.1.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate coap-message-demos 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate coap-message-demos 0.1.0
[INFO] tweaked toml for crates.io crate coap-message-demos 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate coap-message-demos 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded atomic-polyfill v0.1.3
[INFO] [stderr]   Downloaded embedded-nal v0.6.0
[INFO] [stderr]   Downloaded coap-lite v0.5.1
[INFO] [stderr]   Downloaded coap-message v0.2.0
[INFO] [stderr]   Downloaded embedded-nal-minimal-coapserver v0.3.0
[INFO] [stderr]   Downloaded windowed-infinity v0.1.1
[INFO] [stderr]   Downloaded coap-handler-implementations v0.1.0
[INFO] [stderr]   Downloaded coap-numbers v0.1.2
[INFO] [stderr]   Downloaded coap-handler v0.1.1
[INFO] [stderr]   Downloaded heapless v0.7.4
[INFO] [stderr]   Downloaded coap-message-utils v0.1.0
[INFO] [stderr]   Downloaded log_buffer v1.2.0
[INFO] [stderr]   Downloaded std-embedded-nal v0.1.1
[INFO] [stderr]   Downloaded coap v0.11.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 763985ae25ea8263d813c70f8061e80f3b90640ef51f065e7b25713c86b25f70
[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" "763985ae25ea8263d813c70f8061e80f3b90640ef51f065e7b25713c86b25f70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "763985ae25ea8263d813c70f8061e80f3b90640ef51f065e7b25713c86b25f70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "763985ae25ea8263d813c70f8061e80f3b90640ef51f065e7b25713c86b25f70", kill_on_drop: false }`
[INFO] [stdout] 763985ae25ea8263d813c70f8061e80f3b90640ef51f065e7b25713c86b25f70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "RUSTFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ace46df811c99ecaf2aae1d9e1977061e0a2f3e26f78674d04a3a8d86b9a243
[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" "2ace46df811c99ecaf2aae1d9e1977061e0a2f3e26f78674d04a3a8d86b9a243", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling coap-numbers v0.1.2
[INFO] [stderr]    Compiling coap-message v0.2.0
[INFO] [stderr]    Compiling crc v1.8.1
[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/coap-message-0.2.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_associated_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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 `coap-message` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2ace46df811c99ecaf2aae1d9e1977061e0a2f3e26f78674d04a3a8d86b9a243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ace46df811c99ecaf2aae1d9e1977061e0a2f3e26f78674d04a3a8d86b9a243", kill_on_drop: false }`
[INFO] [stdout] 2ace46df811c99ecaf2aae1d9e1977061e0a2f3e26f78674d04a3a8d86b9a243