[INFO] fetching crate fac 0.5.2...
[INFO] documenting fac-0.5.2 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate fac 0.5.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate fac 0.5.2 on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fac 0.5.2
[INFO] finished tweaking crates.io crate fac 0.5.2
[INFO] tweaked toml for crates.io crate fac 0.5.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate fac 0.5.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b192958becfa09e5b9afedfcae36eaaea370cf84423d853004e872d8a1e12dc
[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" "4b192958becfa09e5b9afedfcae36eaaea370cf84423d853004e872d8a1e12dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b192958becfa09e5b9afedfcae36eaaea370cf84423d853004e872d8a1e12dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b192958becfa09e5b9afedfcae36eaaea370cf84423d853004e872d8a1e12dc", kill_on_drop: false }`
[INFO] [stdout] 4b192958becfa09e5b9afedfcae36eaaea370cf84423d853004e872d8a1e12dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "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] 77461f41a63d13c3ff4c166611a0f15057435a50989ddef9d967bc74c84eb410
[INFO] running `Command { std: "docker" "start" "-a" "77461f41a63d13c3ff4c166611a0f15057435a50989ddef9d967bc74c84eb410", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling proc-macro2 v1.0.7
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking pathdiff v0.1.0
[INFO] [stderr]     Checking metrohash v1.0.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking walkdir v2.2.9
[INFO] [stderr]     Checking crude-profiler v0.1.7
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling seccomp-droundy-sys v0.1.2
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.8
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking inotify v0.7.0
[INFO] [stderr]     Checking state v0.4.1
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking tinyset v0.4.2
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking notify v4.0.15
[INFO] [stderr]     Checking seccomp-droundy v0.1.0
[INFO] [stderr]     Checking bigbro v0.5.2
[INFO] [stderr]     Checking ctrlc v3.1.3
[INFO] [stderr]     Checking internment v0.3.12
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling git-version-macro v0.3.4
[INFO] [stderr]     Checking git-version v0.3.4
[INFO] [stderr]  Documenting fac v0.5.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.22s
[INFO] running `Command { std: "docker" "inspect" "77461f41a63d13c3ff4c166611a0f15057435a50989ddef9d967bc74c84eb410", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77461f41a63d13c3ff4c166611a0f15057435a50989ddef9d967bc74c84eb410", kill_on_drop: false }`
[INFO] [stdout] 77461f41a63d13c3ff4c166611a0f15057435a50989ddef9d967bc74c84eb410