[INFO] fetching crate stm32l432xx-hal 0.2.7...
[INFO] documenting stm32l432xx-hal-0.2.7 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate stm32l432xx-hal 0.2.7 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate stm32l432xx-hal 0.2.7 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-1/source/.cargo/config
[INFO] started tweaking crates.io crate stm32l432xx-hal 0.2.7
[INFO] finished tweaking crates.io crate stm32l432xx-hal 0.2.7
[INFO] tweaked toml for crates.io crate stm32l432xx-hal 0.2.7 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dea5a8dee410692e86c13df972d581d5c9e8d9843aa34eb9bc60b2f1fb1f1afd
[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" "dea5a8dee410692e86c13df972d581d5c9e8d9843aa34eb9bc60b2f1fb1f1afd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dea5a8dee410692e86c13df972d581d5c9e8d9843aa34eb9bc60b2f1fb1f1afd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dea5a8dee410692e86c13df972d581d5c9e8d9843aa34eb9bc60b2f1fb1f1afd", kill_on_drop: false }`
[INFO] [stdout] dea5a8dee410692e86c13df972d581d5c9e8d9843aa34eb9bc60b2f1fb1f1afd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ada570983828206df4d3529c47131b0e94f5888d5238a7d6f9a76b97a7c8265a
[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" "ada570983828206df4d3529c47131b0e94f5888d5238a7d6f9a76b97a7c8265a", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling cortex-m v0.6.3
[INFO] [stderr]     Checking vcell v0.1.2
[INFO] [stderr]    Compiling cortex-m-rt v0.6.12
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling cortex-m v0.5.10
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]    Compiling stm32l4 v0.3.2
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking aligned v0.2.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking as-slice v0.1.3
[INFO] [stderr]     Checking aligned v0.3.4
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]  Documenting stm32l432xx-hal v0.2.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(unsize)]
[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 `stm32l432xx-hal`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name stm32l432xx_hal 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 cast=/opt/rustwide/target/debug/deps/libcast-fd0ebbb5406e9056.rmeta --extern cortex_m=/opt/rustwide/target/debug/deps/libcortex_m-1a0f67b8e6c873af.rmeta --extern embedded_hal=/opt/rustwide/target/debug/deps/libembedded_hal-c61f28844b65a01a.rmeta --extern nb=/opt/rustwide/target/debug/deps/libnb-431a084a30f09c6f.rmeta --extern stm32l4=/opt/rustwide/target/debug/deps/libstm32l4-aff40457581dadc2.rmeta --extern void=/opt/rustwide/target/debug/deps/libvoid-1a8a1792dc7c56e1.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "ada570983828206df4d3529c47131b0e94f5888d5238a7d6f9a76b97a7c8265a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ada570983828206df4d3529c47131b0e94f5888d5238a7d6f9a76b97a7c8265a", kill_on_drop: false }`
[INFO] [stdout] ada570983828206df4d3529c47131b0e94f5888d5238a7d6f9a76b97a7c8265a