[INFO] fetching crate coap-message-demos 0.1.0...
[INFO] checking coap-message-demos-0.1.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate coap-message-demos 0.1.0 into /workspace/builds/worker-111/source
[INFO] validating manifest of crates.io crate coap-message-demos 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-111/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" "+1.55.0" "fetch" "--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 hash32 v0.2.1
[INFO] [stderr]   Downloaded atomic-polyfill v0.1.3
[INFO] [stderr]   Downloaded volatile-register v0.2.0
[INFO] [stderr]   Downloaded no-std-net v0.5.0
[INFO] [stderr]   Downloaded std-embedded-nal v0.1.1
[INFO] [stderr]   Downloaded coap-handler-implementations v0.1.0
[INFO] [stderr]   Downloaded embedded-nal v0.6.0
[INFO] [stderr]   Downloaded coap-message v0.2.0
[INFO] [stderr]   Downloaded coap-handler v0.1.1
[INFO] [stderr]   Downloaded windowed-infinity v0.1.1
[INFO] [stderr]   Downloaded coap-numbers v0.1.2
[INFO] [stderr]   Downloaded coap-message-utils v0.1.0
[INFO] [stderr]   Downloaded embedded-nal-minimal-coapserver v0.3.0
[INFO] [stderr]   Downloaded coap v0.11.1
[INFO] [stderr]   Downloaded log_buffer v1.2.0
[INFO] [stderr]   Downloaded coap-lite v0.5.1
[INFO] [stderr]   Downloaded heapless v0.7.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e8c179e24e56f33ba50e00907b6dc48ad01b59e62c5aa9561409da9ee2167696
[INFO] running `Command { std: "docker" "start" "-a" "e8c179e24e56f33ba50e00907b6dc48ad01b59e62c5aa9561409da9ee2167696", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e8c179e24e56f33ba50e00907b6dc48ad01b59e62c5aa9561409da9ee2167696", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8c179e24e56f33ba50e00907b6dc48ad01b59e62c5aa9561409da9ee2167696", kill_on_drop: false }`
[INFO] [stdout] e8c179e24e56f33ba50e00907b6dc48ad01b59e62c5aa9561409da9ee2167696
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/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" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4dc66f9cfbcd756ddc057dabf885c4ee482b5a2b7efcfa88f50b47255ad21a4c
[INFO] running `Command { std: "docker" "start" "-a" "4dc66f9cfbcd756ddc057dabf885c4ee482b5a2b7efcfa88f50b47255ad21a4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling build_const v0.2.2
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking coap-message v0.2.0
[INFO] [stderr]     Checking coap-numbers v0.1.2
[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] [stdout] error[E0554]: `#![feature]` may not be used on the stable 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: build failed
[INFO] running `Command { std: "docker" "inspect" "4dc66f9cfbcd756ddc057dabf885c4ee482b5a2b7efcfa88f50b47255ad21a4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dc66f9cfbcd756ddc057dabf885c4ee482b5a2b7efcfa88f50b47255ad21a4c", kill_on_drop: false }`
[INFO] [stdout] 4dc66f9cfbcd756ddc057dabf885c4ee482b5a2b7efcfa88f50b47255ad21a4c
