[INFO] fetching crate buttons 0.2.0...
[INFO] documenting buttons-0.2.0 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate buttons 0.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate buttons 0.2.0 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] started tweaking crates.io crate buttons 0.2.0
[INFO] finished tweaking crates.io crate buttons 0.2.0
[INFO] tweaked toml for crates.io crate buttons 0.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] c4b353fdfb50b543c559f10884b90538321878207ff8d3f40bb56d14ad4ef710
[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" "c4b353fdfb50b543c559f10884b90538321878207ff8d3f40bb56d14ad4ef710", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4b353fdfb50b543c559f10884b90538321878207ff8d3f40bb56d14ad4ef710", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4b353fdfb50b543c559f10884b90538321878207ff8d3f40bb56d14ad4ef710", kill_on_drop: false }`
[INFO] [stdout] c4b353fdfb50b543c559f10884b90538321878207ff8d3f40bb56d14ad4ef710
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 24e65f9c7706318da46576ebe1e471b25dc6a21cf7ad27ea2ef10856b78037f4
[INFO] running `Command { std: "docker" "start" "-a" "24e65f9c7706318da46576ebe1e471b25dc6a21cf7ad27ea2ef10856b78037f4", kill_on_drop: false }`
[INFO] [stderr]  Documenting buttons v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.54s
[INFO] running `Command { std: "docker" "inspect" "24e65f9c7706318da46576ebe1e471b25dc6a21cf7ad27ea2ef10856b78037f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24e65f9c7706318da46576ebe1e471b25dc6a21cf7ad27ea2ef10856b78037f4", kill_on_drop: false }`
[INFO] [stdout] 24e65f9c7706318da46576ebe1e471b25dc6a21cf7ad27ea2ef10856b78037f4
