[INFO] fetching crate embedded-nal-async 0.1.0...
[INFO] documenting embedded-nal-async-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate embedded-nal-async 0.1.0 into /workspace/builds/worker-80/source
[INFO] validating manifest of crates.io crate embedded-nal-async 0.1.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate embedded-nal-async 0.1.0
[INFO] finished tweaking crates.io crate embedded-nal-async 0.1.0
[INFO] tweaked toml for crates.io crate embedded-nal-async 0.1.0 written to /workspace/builds/worker-80/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded riscv v0.7.0
[INFO] [stderr]   Downloaded bare-metal v1.0.0
[INFO] [stderr]   Downloaded spin v0.9.3
[INFO] [stderr]   Downloaded bit_field v0.10.1
[INFO] [stderr]   Downloaded cortex-m v0.7.4
[INFO] [stderr]   Downloaded volatile-register v0.2.1
[INFO] [stderr]   Downloaded regex v1.5.6
[INFO] [stderr]   Downloaded embedded-nal v0.6.0
[INFO] [stderr]   Downloaded critical-section v0.2.7
[INFO] [stderr]   Downloaded atomic-polyfill v0.1.8
[INFO] [stderr]   Downloaded riscv-target v0.1.2
[INFO] [stderr]   Downloaded rustc_version v0.4.0
[INFO] [stderr]   Downloaded heapless v0.7.13
[INFO] [stderr]   Downloaded memchr v2.5.0
[INFO] [stderr]   Downloaded semver v1.0.9
[INFO] [stderr]   Downloaded no-std-net v0.5.0
[INFO] [stderr]   Downloaded regex-syntax v0.6.26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47289e46da21fd942b6a5b9193f2e054b3a3e58a2318be003925c93334c95859
[INFO] running `Command { std: "docker" "start" "-a" "47289e46da21fd942b6a5b9193f2e054b3a3e58a2318be003925c93334c95859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47289e46da21fd942b6a5b9193f2e054b3a3e58a2318be003925c93334c95859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47289e46da21fd942b6a5b9193f2e054b3a3e58a2318be003925c93334c95859", kill_on_drop: false }`
[INFO] [stdout] 47289e46da21fd942b6a5b9193f2e054b3a3e58a2318be003925c93334c95859
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5dc84f145b2c58c0285c89d119fc43477190fd7409ad007cbbebaaf973231095
[INFO] running `Command { std: "docker" "start" "-a" "5dc84f145b2c58c0285c89d119fc43477190fd7409ad007cbbebaaf973231095", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling semver v1.0.9
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking no-std-net v0.5.0
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking spin v0.9.3
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling heapless v0.7.13
[INFO] [stderr]     Checking embedded-nal v0.6.0
[INFO] [stderr]  Documenting embedded-nal-async v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(generic_associated_types)]
[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 `embedded-nal-async`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name embedded_nal_async src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f3ce3efa29c53981 -L dependency=/opt/rustwide/target/debug/deps --extern embedded_nal=/opt/rustwide/target/debug/deps/libembedded_nal-49619b500658c461.rmeta --extern heapless=/opt/rustwide/target/debug/deps/libheapless-11eae7eb04c1098b.rmeta --extern no_std_net=/opt/rustwide/target/debug/deps/libno_std_net-f0ac8c30dd8c6fad.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5dc84f145b2c58c0285c89d119fc43477190fd7409ad007cbbebaaf973231095", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dc84f145b2c58c0285c89d119fc43477190fd7409ad007cbbebaaf973231095", kill_on_drop: false }`
[INFO] [stdout] 5dc84f145b2c58c0285c89d119fc43477190fd7409ad007cbbebaaf973231095