[INFO] fetching crate kiibohd-hid-io 0.1.6...
[INFO] documenting kiibohd-hid-io-0.1.6 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate kiibohd-hid-io 0.1.6 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate kiibohd-hid-io 0.1.6 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kiibohd-hid-io 0.1.6
[INFO] finished tweaking crates.io crate kiibohd-hid-io 0.1.6
[INFO] tweaked toml for crates.io crate kiibohd-hid-io 0.1.6 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "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 atomic-polyfill v1.0.3
[INFO] [stderr]   Downloaded enum-primitive-derive v0.2.2
[INFO] [stderr]   Downloaded kll-macros v0.1.2
[INFO] [stderr]   Downloaded pkg-version v1.0.0
[INFO] [stderr]   Downloaded defmt-parser v0.3.4
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]   Downloaded kll-core v0.1.8
[INFO] [stderr]   Downloaded hid-io-protocol v0.1.6
[INFO] [stderr]   Downloaded defmt-macros v0.3.7
[INFO] [stderr]   Downloaded defmt v0.3.6
[INFO] [stderr]   Downloaded kll-hid v0.1.2
[INFO] [stderr]   Downloaded hash32 v0.2.1
[INFO] [stderr]   Downloaded critical-section v1.1.2
[INFO] [stderr]   Downloaded pkg-version-impl v0.1.1
[INFO] [stderr]   Downloaded heapless v0.7.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 756775b2d671fb930af0b65cf2d09fe6f640913420389f3190947f13ed25dfcc
[INFO] running `Command { std: "docker" "start" "-a" "756775b2d671fb930af0b65cf2d09fe6f640913420389f3190947f13ed25dfcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "756775b2d671fb930af0b65cf2d09fe6f640913420389f3190947f13ed25dfcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "756775b2d671fb930af0b65cf2d09fe6f640913420389f3190947f13ed25dfcc", kill_on_drop: false }`
[INFO] [stdout] 756775b2d671fb930af0b65cf2d09fe6f640913420389f3190947f13ed25dfcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 64d26f8ef1688c2669f96d1ac539c09a5b0d6594d3f08991951077f90d77fdc8
[INFO] running `Command { std: "docker" "start" "-a" "64d26f8ef1688c2669f96d1ac539c09a5b0d6594d3f08991951077f90d77fdc8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling semver v1.0.21
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling kll-macros v0.1.2
[INFO] [stderr]     Checking kll-hid v0.1.2
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling pkg-version-impl v0.1.1
[INFO] [stderr]     Checking pkg-version v1.0.0
[INFO] [stderr]    Compiling num_enum_derive v0.5.11
[INFO] [stderr]    Compiling enum-primitive-derive v0.2.2
[INFO] [stderr]     Checking kll-core v0.1.8
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/kll-core-0.1.8/src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(let_chains)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 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 `kll-core` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "64d26f8ef1688c2669f96d1ac539c09a5b0d6594d3f08991951077f90d77fdc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64d26f8ef1688c2669f96d1ac539c09a5b0d6594d3f08991951077f90d77fdc8", kill_on_drop: false }`
[INFO] [stdout] 64d26f8ef1688c2669f96d1ac539c09a5b0d6594d3f08991951077f90d77fdc8
