[INFO] fetching crate atsam4lc8c 0.1.1...
[INFO] documenting atsam4lc8c-0.1.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate atsam4lc8c 0.1.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate atsam4lc8c 0.1.1 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] removed /workspace/builds/worker-4/source/.cargo/config
[INFO] started tweaking crates.io crate atsam4lc8c 0.1.1
[INFO] finished tweaking crates.io crate atsam4lc8c 0.1.1
[INFO] tweaked toml for crates.io crate atsam4lc8c 0.1.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded cortex-m-rt v0.5.7
[INFO] [stderr]   Downloaded panic-semihosting v0.2.0
[INFO] [stderr]   Downloaded cortex-m-log v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] c7bf466d58e420d96b7d36b7c39ca220eca268b2f08a8db45003335578a4e5e8
[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" "c7bf466d58e420d96b7d36b7c39ca220eca268b2f08a8db45003335578a4e5e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c7bf466d58e420d96b7d36b7c39ca220eca268b2f08a8db45003335578a4e5e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7bf466d58e420d96b7d36b7c39ca220eca268b2f08a8db45003335578a4e5e8", kill_on_drop: false }`
[INFO] [stdout] c7bf466d58e420d96b7d36b7c39ca220eca268b2f08a8db45003335578a4e5e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 6287c92b794a7c3d6e790622d4206eb9fa7b5948044e3140a773a20ea5254814
[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" "6287c92b794a7c3d6e790622d4206eb9fa7b5948044e3140a773a20ea5254814", kill_on_drop: false }`
[INFO] [stderr]    Compiling cortex-m v0.5.10
[INFO] [stderr]     Checking aligned v0.2.0
[INFO] [stderr]    Compiling atsam4lc8c v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting atsam4lc8c v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: Could not document `atsam4lc8c`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name atsam4lc8c 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-e031b5518942963c.rmeta --extern cortex_m=/opt/rustwide/target/debug/deps/libcortex_m-d8000ed704aa8b51.rmeta --extern vcell=/opt/rustwide/target/debug/deps/libvcell-26c0afb41e86d883.rmeta --cap-lints=warn --crate-version 0.1.1` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "6287c92b794a7c3d6e790622d4206eb9fa7b5948044e3140a773a20ea5254814", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6287c92b794a7c3d6e790622d4206eb9fa7b5948044e3140a773a20ea5254814", kill_on_drop: false }`
[INFO] [stdout] 6287c92b794a7c3d6e790622d4206eb9fa7b5948044e3140a773a20ea5254814