[INFO] cloning repository https://github.com/quartiq/thermostat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/quartiq/thermostat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquartiq%2Fthermostat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquartiq%2Fthermostat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1fc3131baaf6dfd6b3e47f4be5e1d7187858d126
[INFO] documenting quartiq/thermostat against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquartiq%2Fthermostat" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quartiq/thermostat on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config
[INFO] started tweaking git repo https://github.com/quartiq/thermostat
[INFO] finished tweaking git repo https://github.com/quartiq/thermostat
[INFO] tweaked toml for git repo https://github.com/quartiq/thermostat written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/quartiq/thermostat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/stm32-rs/stm32f4xx-hal.git`
[INFO] [stderr]     Updating git repository `https://github.com/stm32-rs/stm32-eth.git`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded uom v0.29.0
[INFO] [stderr]   Downloaded managed v0.7.2
[INFO] [stderr]   Downloaded bit_field v0.10.1
[INFO] [stderr]   Downloaded usb-device v0.2.5
[INFO] [stderr]   Downloaded postcard-cobs v0.1.5-pre
[INFO] [stderr]   Downloaded smoltcp v0.6.0
[INFO] [stderr]   Downloaded postcard v0.5.1
[INFO] [stderr]   Downloaded cortex-m-log v0.6.2
[INFO] [stderr]   Downloaded synopsys-usb-otg v0.2.2
[INFO] [stderr]   Downloaded usbd-serial v0.1.0
[INFO] [stderr]   Downloaded embedded-dma v0.1.1
[INFO] [stderr]   Downloaded stm32f4 v0.11.0
[INFO] [stderr]   Downloaded eeprom24x v0.3.0
[INFO] [stderr]   Downloaded serde-json-core v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 174ec8ae58567251207da6d6121fea4127077983bc020d9bcd88b10170a33900
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "174ec8ae58567251207da6d6121fea4127077983bc020d9bcd88b10170a33900", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "174ec8ae58567251207da6d6121fea4127077983bc020d9bcd88b10170a33900", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "174ec8ae58567251207da6d6121fea4127077983bc020d9bcd88b10170a33900", kill_on_drop: false }`
[INFO] [stdout] 174ec8ae58567251207da6d6121fea4127077983bc020d9bcd88b10170a33900
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3cf03d4a9e3c043459a4d0222ffffe0e6a10320fc5c3bb8fa79909e4c7361740
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3cf03d4a9e3c043459a4d0222ffffe0e6a10320fc5c3bb8fa79909e4c7361740", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]    Compiling cortex-m v0.6.3
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling heapless v0.5.6
[INFO] [stderr]    Compiling stm32f4 v0.11.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking usb-device v0.2.5
[INFO] [stderr]    Compiling synopsys-usb-otg v0.2.2
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling cortex-m-log v0.6.2
[INFO] [stderr]     Checking managed v0.7.2
[INFO] [stderr]    Compiling thermostat v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking postcard-cobs v0.1.5-pre
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking embedded-dma v0.1.1
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]     Checking hash32 v0.1.1
[INFO] [stderr]     Checking usbd-serial v0.1.0
[INFO] [stderr]     Checking eeprom24x v0.3.0
[INFO] [stderr]     Checking smoltcp v0.6.0
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]     Checking cortex-m-rt v0.6.12
[INFO] [stderr]     Checking uom v0.29.0
[INFO] [stderr]     Checking postcard v0.5.1
[INFO] [stderr]     Checking serde-json-core v0.1.0
[INFO] [stderr]     Checking stm32f4xx-hal v0.8.3 (https://github.com/stm32-rs/stm32f4xx-hal.git#4a1a019f)
[INFO] [stderr]     Checking stm32-eth v0.2.0 (https://github.com/stm32-rs/stm32-eth.git#4d6b29bf)
[INFO] [stderr]  Documenting thermostat v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(maybe_uninit_extra, maybe_uninit_ref)]
[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 `thermostat`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name thermostat src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bare_metal=/opt/rustwide/target/debug/deps/libbare_metal-8f137732f541716d.rmeta --extern bit_field=/opt/rustwide/target/debug/deps/libbit_field-f54a8949db1d04db.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-527f0a110f57d7be.rmeta --extern cortex_m=/opt/rustwide/target/debug/deps/libcortex_m-d3736b3e2da06f59.rmeta --extern cortex_m_log=/opt/rustwide/target/debug/deps/libcortex_m_log-048354f15ca4910d.rmeta --extern cortex_m_rt=/opt/rustwide/target/debug/deps/libcortex_m_rt-3bc51aff2b9a648c.rmeta --extern eeprom24x=/opt/rustwide/target/debug/deps/libeeprom24x-90214233c5ceb2b0.rmeta --extern heapless=/opt/rustwide/target/debug/deps/libheapless-275c69a956be7785.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-4d9b6dc7228ae14f.rmeta --extern nb=/opt/rustwide/target/debug/deps/libnb-74e5958c4851f715.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-702e1b7e5dd6cb57.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-0e02acb8d34fda9a.rmeta --extern panic_halt=/opt/rustwide/target/debug/deps/libpanic_halt-cf482e4f96cba0d0.rmeta --extern postcard=/opt/rustwide/target/debug/deps/libpostcard-466c7c1cc0912dcb.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-2dd9920b75de1722.rmeta --extern serde_json_core=/opt/rustwide/target/debug/deps/libserde_json_core-4695df4c7765bb0f.rmeta --extern smoltcp=/opt/rustwide/target/debug/deps/libsmoltcp-aed18d3720f51ed2.rmeta --extern stm32_eth=/opt/rustwide/target/debug/deps/libstm32_eth-856a17cbf6e6cf6e.rmeta --extern stm32f4xx_hal=/opt/rustwide/target/debug/deps/libstm32f4xx_hal-f70098e95b1cab73.rmeta --extern uom=/opt/rustwide/target/debug/deps/libuom-c474d7486d348169.rmeta --extern usb_device=/opt/rustwide/target/debug/deps/libusb_device-29f83a5927d331ec.rmeta --extern usbd_serial=/opt/rustwide/target/debug/deps/libusbd_serial-716556fa024dff0d.rmeta --cap-lints=warn --crate-version 0.0.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "3cf03d4a9e3c043459a4d0222ffffe0e6a10320fc5c3bb8fa79909e4c7361740", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cf03d4a9e3c043459a4d0222ffffe0e6a10320fc5c3bb8fa79909e4c7361740", kill_on_drop: false }`
[INFO] [stdout] 3cf03d4a9e3c043459a4d0222ffffe0e6a10320fc5c3bb8fa79909e4c7361740
