[INFO] cloning repository https://github.com/songzhi/shell
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/songzhi/shell" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsongzhi%2Fshell", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsongzhi%2Fshell'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 297fc80e2ae2b8115dd82d3e8ae499144bceeb15
[INFO] documenting songzhi/shell 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%2Fsongzhi%2Fshell" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/songzhi/shell 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/songzhi/shell
[INFO] finished tweaking git repo https://github.com/songzhi/shell
[INFO] tweaked toml for git repo https://github.com/songzhi/shell written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/songzhi/shell 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 bytecount v0.3.2
[INFO] [stderr]   Downloaded enumflags2 v0.6.2
[INFO] [stderr]   Downloaded dunce v1.0.0
[INFO] [stderr]   Downloaded rustyline v6.0.0
[INFO] [stderr]   Downloaded nom_locate v1.0.0
[INFO] [stderr]   Downloaded nom-tracable v0.4.1
[INFO] [stderr]   Downloaded enumflags2_derive v0.6.2
[INFO] [stderr]   Downloaded derive-new v0.5.8
[INFO] [stderr]   Downloaded nom-tracable-macros v0.4.1
[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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2945367e740c43657cdcaa974d8f5b8336e44297b8d0bc9e2913e9da2766e09
[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" "d2945367e740c43657cdcaa974d8f5b8336e44297b8d0bc9e2913e9da2766e09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2945367e740c43657cdcaa974d8f5b8336e44297b8d0bc9e2913e9da2766e09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2945367e740c43657cdcaa974d8f5b8336e44297b8d0bc9e2913e9da2766e09", kill_on_drop: false }`
[INFO] [stdout] d2945367e740c43657cdcaa974d8f5b8336e44297b8d0bc9e2913e9da2766e09
[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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d24b59d3e804603514164fcd859aaa98d2b99e9355d9d0ffab38ae69ed0050f
[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" "6d24b59d3e804603514164fcd859aaa98d2b99e9355d9d0ffab38ae69ed0050f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking utf8parse v0.1.1
[INFO] [stderr]     Checking bytecount v0.3.2
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]     Checking dunce v1.0.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]     Checking lock_api v0.3.3
[INFO] [stderr]     Checking vte v0.3.3
[INFO] [stderr]     Checking strip-ansi-escapes v0.1.0
[INFO] [stderr]     Checking nom v5.1.0
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking backtrace v0.3.44
[INFO] [stderr]     Checking shellexpand v1.1.1
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking which v3.1.0
[INFO] [stderr]     Checking nom_locate v1.0.0
[INFO] [stderr]     Checking ctrlc v3.1.3
[INFO] [stderr]     Checking rustyline v6.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling nom-tracable-macros v0.4.1
[INFO] [stderr]    Compiling enumflags2_derive v0.6.2
[INFO] [stderr]    Compiling derive-new v0.5.8
[INFO] [stderr]     Checking nom-tracable v0.4.1
[INFO] [stderr]     Checking enumflags2 v0.6.2
[INFO] [stderr]     Checking bigdecimal v0.1.0
[INFO] [stderr]  Documenting shell v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/commands/classified/external.rs:151:5
[INFO] [stdout]     |
[INFO] [stdout] 151 | /     (argument.starts_with('"') && argument.ends_with('"')
[INFO] [stdout] 152 | |         || (argument.starts_with('\'') && argument.ends_with('\'')))
[INFO] [stdout]     | |____________________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 151 |     argument.starts_with('"') && argument.ends_with('"')
[INFO] [stdout] 152 |         || (argument.starts_with('\'') && argument.ends_with('\''))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 04s
[INFO] running `Command { std: "docker" "inspect" "6d24b59d3e804603514164fcd859aaa98d2b99e9355d9d0ffab38ae69ed0050f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d24b59d3e804603514164fcd859aaa98d2b99e9355d9d0ffab38ae69ed0050f", kill_on_drop: false }`
[INFO] [stdout] 6d24b59d3e804603514164fcd859aaa98d2b99e9355d9d0ffab38ae69ed0050f