[INFO] cloning repository https://github.com/Caspinol/stm32f401xx
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Caspinol/stm32f401xx" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCaspinol%2Fstm32f401xx", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCaspinol%2Fstm32f401xx'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ffd5f00bbbfa66912d0457f53c5b800cbbd45857
[INFO] documenting Caspinol/stm32f401xx against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCaspinol%2Fstm32f401xx" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Caspinol/stm32f401xx on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Caspinol/stm32f401xx
[INFO] finished tweaking git repo https://github.com/Caspinol/stm32f401xx
[INFO] tweaked toml for git repo https://github.com/Caspinol/stm32f401xx written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/Caspinol/stm32f401xx already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--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 cortex-m v0.5.8
[INFO] [stderr]   Downloaded cortex-m-rt v0.6.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6980dee1797d5572d58ad1ea001f69b4df92ee81d272ff176238267b36a148f1
[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" "6980dee1797d5572d58ad1ea001f69b4df92ee81d272ff176238267b36a148f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6980dee1797d5572d58ad1ea001f69b4df92ee81d272ff176238267b36a148f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6980dee1797d5572d58ad1ea001f69b4df92ee81d272ff176238267b36a148f1", kill_on_drop: false }`
[INFO] [stdout] 6980dee1797d5572d58ad1ea001f69b4df92ee81d272ff176238267b36a148f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a52503df11122f0ec0281d7a55a145cfc9f837cf166b5ccb9f87c50f7ad7e7f
[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" "9a52503df11122f0ec0281d7a55a145cfc9f837cf166b5ccb9f87c50f7ad7e7f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking vcell v0.1.0
[INFO] [stderr]    Compiling cortex-m v0.5.8
[INFO] [stderr]    Compiling bare-metal v0.2.4
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]  Documenting stm32f401xx v0.11.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: Could not document `stm32f401xx`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name stm32f401xx 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 bare_metal=/opt/rustwide/target/debug/deps/libbare_metal-db0d1680f39bcb7f.rmeta --extern cortex_m=/opt/rustwide/target/debug/deps/libcortex_m-f453cc36e5403531.rmeta --extern vcell=/opt/rustwide/target/debug/deps/libvcell-563ad38c55a2c007.rmeta --cap-lints=warn --crate-version 0.11.0` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "9a52503df11122f0ec0281d7a55a145cfc9f837cf166b5ccb9f87c50f7ad7e7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a52503df11122f0ec0281d7a55a145cfc9f837cf166b5ccb9f87c50f7ad7e7f", kill_on_drop: false }`
[INFO] [stdout] 9a52503df11122f0ec0281d7a55a145cfc9f837cf166b5ccb9f87c50f7ad7e7f