[INFO] cloning repository https://github.com/dbosomworth/rust-piston-snake
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dbosomworth/rust-piston-snake" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdbosomworth%2Frust-piston-snake", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdbosomworth%2Frust-piston-snake'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 70c6ade6d008a784eaa8e6fc779fe55baec97c95
[INFO] documenting dbosomworth/rust-piston-snake 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%2Fdbosomworth%2Frust-piston-snake" "/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/dbosomworth/rust-piston-snake 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/dbosomworth/rust-piston-snake
[INFO] finished tweaking git repo https://github.com/dbosomworth/rust-piston-snake
[INFO] tweaked toml for git repo https://github.com/dbosomworth/rust-piston-snake written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/dbosomworth/rust-piston-snake 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 piston2d-graphics v0.35.0
[INFO] [stderr]   Downloaded glutin v0.21.1
[INFO] [stderr]   Downloaded piston-gfx_texture v0.40.0
[INFO] [stderr]   Downloaded piston2d-gfx_graphics v0.66.0
[INFO] [stderr]   Downloaded piston_window v0.105.0
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 46549bb56c8263ed3984836fda92f259ed7a6278174aacbbb2ac744221267aef
[INFO] running `Command { std: "docker" "start" "-a" "46549bb56c8263ed3984836fda92f259ed7a6278174aacbbb2ac744221267aef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46549bb56c8263ed3984836fda92f259ed7a6278174aacbbb2ac744221267aef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46549bb56c8263ed3984836fda92f259ed7a6278174aacbbb2ac744221267aef", kill_on_drop: false }`
[INFO] [stdout] 46549bb56c8263ed3984836fda92f259ed7a6278174aacbbb2ac744221267aef
[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] 44273e717f54932a91fa3e396fcb370ea6292d4c8458c1c7069da854017817ea
[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" "44273e717f54932a91fa3e396fcb370ea6292d4c8458c1c7069da854017817ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]     Checking raw-window-handle v0.3.1
[INFO] [stderr]     Checking x11-dl v2.18.4
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking tiff v0.3.1
[INFO] [stderr]     Checking rusttype v0.7.9
[INFO] [stderr]     Checking wayland-commons v0.21.13
[INFO] [stderr]     Checking jpeg-decoder v0.1.16
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]     Checking piston2d-graphics v0.35.0
[INFO] [stderr]     Checking wayland-client v0.21.13
[INFO] [stderr]     Checking image v0.22.3
[INFO] [stderr]     Checking wayland-protocols v0.21.13
[INFO] [stderr]     Checking glutin_glx_sys v0.1.5
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]     Checking piston-gfx_texture v0.40.0
[INFO] [stderr]     Checking piston2d-gfx_graphics v0.66.0
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.6
[INFO] [stderr]     Checking winit v0.19.4
[INFO] [stderr]     Checking glutin v0.21.1
[INFO] [stderr]     Checking pistoncore-input v0.28.0
[INFO] [stderr]     Checking pistoncore-window v0.44.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.49.0
[INFO] [stderr]     Checking pistoncore-glutin_window v0.63.0
[INFO] [stderr]     Checking piston v0.49.0
[INFO] [stderr]     Checking piston_window v0.105.0
[INFO] [stderr]  Documenting rust-piston-snake v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/main.rs:83:13
[INFO] [stdout]    |
[INFO] [stdout] 83 |             (true)
[INFO] [stdout]    |             ^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/main.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |             (true)
[INFO] [stdout]    |             ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/main.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |             (false)
[INFO] [stdout]     |             ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/main.rs:175:25
[INFO] [stdout]     |
[INFO] [stdout] 175 |                         (COLOR_RED)
[INFO] [stdout]     |                         ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/main.rs:177:25
[INFO] [stdout]     |
[INFO] [stdout] 177 |                         (COLOR_GREEN)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/main.rs:179:25
[INFO] [stdout]     |
[INFO] [stdout] 179 |                         (COLOR_YELLOW)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/main.rs:181:25
[INFO] [stdout]     |
[INFO] [stdout] 181 |                         (COLOR_BLACK)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 51.71s
[INFO] running `Command { std: "docker" "inspect" "44273e717f54932a91fa3e396fcb370ea6292d4c8458c1c7069da854017817ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44273e717f54932a91fa3e396fcb370ea6292d4c8458c1c7069da854017817ea", kill_on_drop: false }`
[INFO] [stdout] 44273e717f54932a91fa3e396fcb370ea6292d4c8458c1c7069da854017817ea