[INFO] cloning repository https://github.com/iluvpy/ascii_snake
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iluvpy/ascii_snake" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filuvpy%2Fascii_snake", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filuvpy%2Fascii_snake'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 107cc63515af3d322b64f6dbc042bc55c2d086e5
[INFO] checking iluvpy/ascii_snake against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filuvpy%2Fascii_snake" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/iluvpy/ascii_snake
[INFO] finished tweaking git repo https://github.com/iluvpy/ascii_snake
[INFO] tweaked toml for git repo https://github.com/iluvpy/ascii_snake written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/iluvpy/ascii_snake on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/iluvpy/ascii_snake already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd329ac6a36b7a5b19283b86740fce59720b99a50fd898c7dd6ac393fba04403
[INFO] running `Command { std: "docker" "start" "-a" "cd329ac6a36b7a5b19283b86740fce59720b99a50fd898c7dd6ac393fba04403", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd329ac6a36b7a5b19283b86740fce59720b99a50fd898c7dd6ac393fba04403", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd329ac6a36b7a5b19283b86740fce59720b99a50fd898c7dd6ac393fba04403", kill_on_drop: false }`
[INFO] [stdout] cd329ac6a36b7a5b19283b86740fce59720b99a50fd898c7dd6ac393fba04403
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1cd97126c3eb35be969fb871723646341033b3804a22edd28c17c55e683f3f99
[INFO] running `Command { std: "docker" "start" "-a" "1cd97126c3eb35be969fb871723646341033b3804a22edd28c17c55e683f3f99", kill_on_drop: false }`
[INFO] [stderr]     Checking ascii_snake v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/game/snake/mod.rs:27:6
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let mut snake = &mut game_data.snake;
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/game/snake/mod.rs:27:6
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let mut snake = &mut game_data.snake;
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_data`
[INFO] [stdout]   --> src/game/apple/mod.rs:11:21
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn update_apple(game_data: &mut GameData) {
[INFO] [stdout]    |                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `alive` is never read
[INFO] [stdout]   --> src/game/snake/mod.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub struct Snake {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub alive: bool
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_data`
[INFO] [stdout]   --> src/game/apple/mod.rs:11:21
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn update_apple(game_data: &mut GameData) {
[INFO] [stdout]    |                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `alive` is never read
[INFO] [stdout]   --> src/game/snake/mod.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub struct Snake {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub alive: bool
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/game/mod.rs:72:3
[INFO] [stdout]    |
[INFO] [stdout] 72 |         stdout.flush();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let _ = stdout.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/game/mod.rs:72:3
[INFO] [stdout]    |
[INFO] [stdout] 72 |         stdout.flush();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let _ = stdout.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "1cd97126c3eb35be969fb871723646341033b3804a22edd28c17c55e683f3f99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cd97126c3eb35be969fb871723646341033b3804a22edd28c17c55e683f3f99", kill_on_drop: false }`
[INFO] [stdout] 1cd97126c3eb35be969fb871723646341033b3804a22edd28c17c55e683f3f99