[INFO] fetching crate btrfsutil 0.1.0...
[INFO] documenting btrfsutil-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate btrfsutil 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate btrfsutil 0.1.0 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 crates.io crate btrfsutil 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate btrfsutil 0.1.0
[INFO] tweaked toml for crates.io crate btrfsutil 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate btrfsutil 0.1.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] ba3a37f9e15f308cb4babb633d80d7f640d11665d04524bda54d311dc0f79be8
[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" "ba3a37f9e15f308cb4babb633d80d7f640d11665d04524bda54d311dc0f79be8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba3a37f9e15f308cb4babb633d80d7f640d11665d04524bda54d311dc0f79be8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba3a37f9e15f308cb4babb633d80d7f640d11665d04524bda54d311dc0f79be8", kill_on_drop: false }`
[INFO] [stdout] ba3a37f9e15f308cb4babb633d80d7f640d11665d04524bda54d311dc0f79be8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 985fc5e1be5130b6d7da5458c1f4fc67d02cb34b73df76530c4e95dca5029c63
[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" "985fc5e1be5130b6d7da5458c1f4fc67d02cb34b73df76530c4e95dca5029c63", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling bindgen v0.53.2
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling lazycell v1.2.1
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]    Compiling clang-sys v0.29.3
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling regex v1.3.7
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling thiserror-impl v1.0.16
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]     Checking thiserror v1.0.16
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling btrfsutil v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting btrfsutil v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 10s
[INFO] running `Command { std: "docker" "inspect" "985fc5e1be5130b6d7da5458c1f4fc67d02cb34b73df76530c4e95dca5029c63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "985fc5e1be5130b6d7da5458c1f4fc67d02cb34b73df76530c4e95dca5029c63", kill_on_drop: false }`
[INFO] [stdout] 985fc5e1be5130b6d7da5458c1f4fc67d02cb34b73df76530c4e95dca5029c63