[INFO] fetching crate from_variants 0.6.0...
[INFO] documenting from_variants-0.6.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate from_variants 0.6.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate from_variants 0.6.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate from_variants 0.6.0
[INFO] finished tweaking crates.io crate from_variants 0.6.0
[INFO] tweaked toml for crates.io crate from_variants 0.6.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate from_variants 0.6.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4118f655191c806a0d609bd2db0ea26faa8107a24dd78d4e45e2f75c8dd7860f
[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" "4118f655191c806a0d609bd2db0ea26faa8107a24dd78d4e45e2f75c8dd7860f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4118f655191c806a0d609bd2db0ea26faa8107a24dd78d4e45e2f75c8dd7860f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4118f655191c806a0d609bd2db0ea26faa8107a24dd78d4e45e2f75c8dd7860f", kill_on_drop: false }`
[INFO] [stdout] 4118f655191c806a0d609bd2db0ea26faa8107a24dd78d4e45e2f75c8dd7860f
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "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] a768bdeeec7c99b6149b57d40f704b912c014c3459c377743ea1c4e22538ea31
[INFO] running `Command { std: "docker" "start" "-a" "a768bdeeec7c99b6149b57d40f704b912c014c3459c377743ea1c4e22538ea31", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling from_variants_impl v0.6.0
[INFO] [stderr]  Documenting from_variants v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.88s
[INFO] running `Command { std: "docker" "inspect" "a768bdeeec7c99b6149b57d40f704b912c014c3459c377743ea1c4e22538ea31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a768bdeeec7c99b6149b57d40f704b912c014c3459c377743ea1c4e22538ea31", kill_on_drop: false }`
[INFO] [stdout] a768bdeeec7c99b6149b57d40f704b912c014c3459c377743ea1c4e22538ea31
