[INFO] fetching crate mk20d7-hal 0.1.1...
[INFO] documenting mk20d7-hal-0.1.1 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate mk20d7-hal 0.1.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate mk20d7-hal 0.1.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mk20d7-hal 0.1.1
[INFO] finished tweaking crates.io crate mk20d7-hal 0.1.1
[INFO] tweaked toml for crates.io crate mk20d7-hal 0.1.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitrate v0.1.1
[INFO] [stderr]   Downloaded bare-metal v1.0.0
[INFO] [stderr]   Downloaded mk20d7 v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6a434dc88fe99173b7e221730c31fde4f0b1a853a107fb79a3cc9d0b5a1d153
[INFO] running `Command { std: "docker" "start" "-a" "b6a434dc88fe99173b7e221730c31fde4f0b1a853a107fb79a3cc9d0b5a1d153", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6a434dc88fe99173b7e221730c31fde4f0b1a853a107fb79a3cc9d0b5a1d153", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6a434dc88fe99173b7e221730c31fde4f0b1a853a107fb79a3cc9d0b5a1d153", kill_on_drop: false }`
[INFO] [stdout] b6a434dc88fe99173b7e221730c31fde4f0b1a853a107fb79a3cc9d0b5a1d153
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 404320868b4b73cc3f287d878256955d2f46a9e2b3147e78b3f41af9b6d67626
[INFO] running `Command { std: "docker" "start" "-a" "404320868b4b73cc3f287d878256955d2f46a9e2b3147e78b3f41af9b6d67626", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cortex-m v0.7.7
[INFO] [stderr]     Checking nb v1.1.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling mk20d7 v0.1.2
[INFO] [stderr]     Checking bare-metal v1.0.0
[INFO] [stderr]     Checking bit_field v0.10.2
[INFO] [stderr]     Checking bitrate v0.1.1
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking volatile-register v0.2.2
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]  Documenting mk20d7-hal v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(never_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[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 `mk20d7-hal`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --crate-type lib --crate-name mk20d7_hal src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=8d8589258a9e8129 -L dependency=/opt/rustwide/target/debug/deps --extern bit_field=/opt/rustwide/target/debug/deps/libbit_field-5f200b11ef6de4f9.rmeta --extern bitrate=/opt/rustwide/target/debug/deps/libbitrate-5047731ffea3551d.rmeta --extern cast=/opt/rustwide/target/debug/deps/libcast-1260807a74d01084.rmeta --extern cortex_m=/opt/rustwide/target/debug/deps/libcortex_m-b9f1d59275a0c402.rmeta --extern embedded_hal=/opt/rustwide/target/debug/deps/libembedded_hal-9884b757a08a5c34.rmeta --extern mk20d7=/opt/rustwide/target/debug/deps/libmk20d7-730f03af9b47122a.rmeta --extern nb=/opt/rustwide/target/debug/deps/libnb-5229b0eb9944f8f8.rmeta --extern void=/opt/rustwide/target/debug/deps/libvoid-8beacb293700c732.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "404320868b4b73cc3f287d878256955d2f46a9e2b3147e78b3f41af9b6d67626", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "404320868b4b73cc3f287d878256955d2f46a9e2b3147e78b3f41af9b6d67626", kill_on_drop: false }`
[INFO] [stdout] 404320868b4b73cc3f287d878256955d2f46a9e2b3147e78b3f41af9b6d67626
