[INFO] fetching crate rrun 0.2.3...
[INFO] documenting rrun-0.2.3 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate rrun 0.2.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate rrun 0.2.3 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 rrun 0.2.3
[INFO] finished tweaking crates.io crate rrun 0.2.3
[INFO] tweaked toml for crates.io crate rrun 0.2.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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 c_vec v1.2.1
[INFO] [stderr]   Downloaded gdk-pixbuf-sys v0.5.0
[INFO] [stderr]   Downloaded gdk-pixbuf v0.3.0
[INFO] [stderr]   Downloaded pango-sys v0.5.0
[INFO] [stderr]   Downloaded gio v0.3.0
[INFO] [stderr]   Downloaded gdk v0.7.0
[INFO] [stderr]   Downloaded atk-sys v0.5.0
[INFO] [stderr]   Downloaded cairo-rs v0.3.0
[INFO] [stderr]   Downloaded glib-sys v0.5.0
[INFO] [stderr]   Downloaded gtk v0.3.0
[INFO] [stderr]   Downloaded glib v0.4.1
[INFO] [stderr]   Downloaded gobject-sys v0.5.0
[INFO] [stderr]   Downloaded pango v0.3.0
[INFO] [stderr]   Downloaded gio-sys v0.5.0
[INFO] [stderr]   Downloaded gdk-sys v0.5.0
[INFO] [stderr]   Downloaded gtk-sys v0.5.0
[INFO] [stderr]   Downloaded cairo-sys-rs v0.5.0
[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" "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] f0eab9a8a34949c32a4a2d0ab812fd1fb5e8400375a513ec435ad95383598d53
[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" "f0eab9a8a34949c32a4a2d0ab812fd1fb5e8400375a513ec435ad95383598d53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0eab9a8a34949c32a4a2d0ab812fd1fb5e8400375a513ec435ad95383598d53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0eab9a8a34949c32a4a2d0ab812fd1fb5e8400375a513ec435ad95383598d53", kill_on_drop: false }`
[INFO] [stdout] f0eab9a8a34949c32a4a2d0ab812fd1fb5e8400375a513ec435ad95383598d53
[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" "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] 6f4d416eaa22140d63efd240002c998bd02af913be10012e85167bd7729eadc7
[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" "6f4d416eaa22140d63efd240002c998bd02af913be10012e85167bd7729eadc7", kill_on_drop: false }`
[INFO] [stderr]    Compiling gdk-pixbuf v0.3.0
[INFO] [stderr]    Compiling cairo-rs v0.3.0
[INFO] [stderr]    Compiling gio v0.3.0
[INFO] [stderr]     Checking c_vec v1.2.1
[INFO] [stderr]    Compiling gdk v0.7.0
[INFO] [stderr]    Compiling gtk v0.3.0
[INFO] [stderr]    Compiling glib-sys v0.5.0
[INFO] [stderr]    Compiling gobject-sys v0.5.0
[INFO] [stderr]    Compiling gio-sys v0.5.0
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.5.0
[INFO] [stderr]    Compiling cairo-sys-rs v0.5.0
[INFO] [stderr]    Compiling pango-sys v0.5.0
[INFO] [stderr]    Compiling gdk-sys v0.5.0
[INFO] [stderr]    Compiling atk-sys v0.5.0
[INFO] [stderr]    Compiling gtk-sys v0.5.0
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking glib v0.4.1
[INFO] [stderr]     Checking pango v0.3.0
[INFO] [stderr]  Documenting rrun v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/externalautocompleter.rs:43:66
[INFO] [stdout]    |
[INFO] [stdout] 43 |                     .fold(self.command.replace("{}", sub_query), (|a, (i, e)| a.replace(&format!("{{{}}}", i), e.as_str())));
[INFO] [stdout]    |                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 58.43s
[INFO] running `Command { std: "docker" "inspect" "6f4d416eaa22140d63efd240002c998bd02af913be10012e85167bd7729eadc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f4d416eaa22140d63efd240002c998bd02af913be10012e85167bd7729eadc7", kill_on_drop: false }`
[INFO] [stdout] 6f4d416eaa22140d63efd240002c998bd02af913be10012e85167bd7729eadc7