[INFO] cloning repository https://github.com/paranoidnas/system
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/paranoidnas/system" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparanoidnas%2Fsystem", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparanoidnas%2Fsystem'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a33a879bf8e65a2dc9ccf145d96f6e3f3d8933ca
[INFO] documenting paranoidnas/system against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparanoidnas%2Fsystem" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/paranoidnas/system 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 git repo https://github.com/paranoidnas/system
[INFO] finished tweaking git repo https://github.com/paranoidnas/system
[INFO] tweaked toml for git repo https://github.com/paranoidnas/system written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/paranoidnas/system 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]  Downloading crates ...
[INFO] [stderr]   Downloaded strum v0.19.2
[INFO] [stderr]   Downloaded human-panic v1.0.3
[INFO] [stderr]   Downloaded strum_macros v0.19.2
[INFO] [stderr]   Downloaded btrfsutil v0.1.0
[INFO] [stderr]   Downloaded mnt v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] bdd9ad9f276d6e65d5e44c2b228a07a7f30591758fa7dd71ddd825f390e014ae
[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" "bdd9ad9f276d6e65d5e44c2b228a07a7f30591758fa7dd71ddd825f390e014ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bdd9ad9f276d6e65d5e44c2b228a07a7f30591758fa7dd71ddd825f390e014ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdd9ad9f276d6e65d5e44c2b228a07a7f30591758fa7dd71ddd825f390e014ae", kill_on_drop: false }`
[INFO] [stdout] bdd9ad9f276d6e65d5e44c2b228a07a7f30591758fa7dd71ddd825f390e014ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 029c26f58d4bcc3a103938bc8955bb6500a146455be94774aca0ab15ee53056a
[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" "029c26f58d4bcc3a103938bc8955bb6500a146455be94774aca0ab15ee53056a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]    Compiling syn v1.0.34
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling cc v1.0.58
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling bindgen v0.53.3
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling lazycell v1.2.1
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]     Checking object v0.20.0
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking os_str_bytes v2.3.1
[INFO] [stderr]     Checking strum v0.19.2
[INFO] [stderr]    Compiling clang-sys v0.29.3
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling hashbrown v0.8.1
[INFO] [stderr]    Compiling indexmap v1.5.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]     Checking miniz_oxide v0.4.0
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]     Checking os_type v2.2.0
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling clap v2.33.1
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking shared_child v0.3.4
[INFO] [stderr]     Checking os_pipe v0.9.2
[INFO] [stderr]     Checking mnt v0.3.1
[INFO] [stderr]     Checking duct v0.13.4
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking chrono v0.4.13
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking addr2line v0.13.0
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling strum_macros v0.19.2
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.1
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking clap v3.0.0-beta.1
[INFO] [stderr]     Checking serde v1.0.114
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking envy v0.4.1
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking human-panic v1.0.3
[INFO] [stderr]    Compiling btrfsutil v0.1.0
[INFO] [stderr]     Checking blkcapt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting blkcapt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Captures`
[INFO] [stdout]  --> src/sys/btrfs.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 | use regex::{Captures, Regex};
[INFO] [stdout]   |             ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]  --> src/model/entities.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `QueriedFilesystem`
[INFO] [stdout]  --> src/core/mod.rs:3:56
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::sys::btrfs::{Filesystem, MountedFilesystem, QueriedFilesystem, Subvolume};
[INFO] [stdout]   |                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/core/mod.rs:5:37
[INFO] [stdout]   |
[INFO] [stdout] 5 | use anyhow::{anyhow, bail, Context, Error, Result};
[INFO] [stdout]   |                                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]  --> src/core/mod.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mem`
[INFO] [stdout]   --> src/core/mod.rs:10:44
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::{cell::RefCell, convert::TryFrom, mem, rc::Rc};
[INFO] [stdout]    |                                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 34s
[INFO] running `Command { std: "docker" "inspect" "029c26f58d4bcc3a103938bc8955bb6500a146455be94774aca0ab15ee53056a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "029c26f58d4bcc3a103938bc8955bb6500a146455be94774aca0ab15ee53056a", kill_on_drop: false }`
[INFO] [stdout] 029c26f58d4bcc3a103938bc8955bb6500a146455be94774aca0ab15ee53056a