[INFO] fetching crate hx711_spi 0.3.1...
[INFO] documenting hx711_spi-0.3.1 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate hx711_spi 0.3.1 into /workspace/builds/worker-97/source
[INFO] validating manifest of crates.io crate hx711_spi 0.3.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hx711_spi 0.3.1
[INFO] finished tweaking crates.io crate hx711_spi 0.3.1
[INFO] tweaked toml for crates.io crate hx711_spi 0.3.1 written to /workspace/builds/worker-97/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba08aba78848840d59ff252d6a6fc46792d97574fb483dc7d3c2887a787debe9
[INFO] running `Command { std: "docker" "start" "-a" "ba08aba78848840d59ff252d6a6fc46792d97574fb483dc7d3c2887a787debe9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba08aba78848840d59ff252d6a6fc46792d97574fb483dc7d3c2887a787debe9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba08aba78848840d59ff252d6a6fc46792d97574fb483dc7d3c2887a787debe9", kill_on_drop: false }`
[INFO] [stdout] ba08aba78848840d59ff252d6a6fc46792d97574fb483dc7d3c2887a787debe9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e500f66259d16bf94663804f642c6c1e269ad56b0e713248ce79bcef0bf15517
[INFO] running `Command { std: "docker" "start" "-a" "e500f66259d16bf94663804f642c6c1e269ad56b0e713248ce79bcef0bf15517", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.6
[INFO] [stderr]    Compiling boolean_expression v0.3.11
[INFO] [stderr]    Compiling bitmatch v0.1.1
[INFO] [stderr]  Documenting hx711_spi v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:48:1
[INFO] [stdout]    |
[INFO] [stdout] 48 | #![feature(negative_impls)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 document `hx711_spi`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name hx711_spi src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bitmatch=/opt/rustwide/target/debug/deps/libbitmatch-7b7c49ff414e307b.so --extern embedded_hal=/opt/rustwide/target/debug/deps/libembedded_hal-4f98a5909ff58772.rmeta --extern nb=/opt/rustwide/target/debug/deps/libnb-db7bfc6b24bee33a.rmeta --cap-lints=warn --crate-version 0.3.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e500f66259d16bf94663804f642c6c1e269ad56b0e713248ce79bcef0bf15517", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e500f66259d16bf94663804f642c6c1e269ad56b0e713248ce79bcef0bf15517", kill_on_drop: false }`
[INFO] [stdout] e500f66259d16bf94663804f642c6c1e269ad56b0e713248ce79bcef0bf15517
