[INFO] updating cached repository https://github.com/echochamber/rust_hex_grid
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c9e98f95bec77dffde5ef30c8501badd56773904
[INFO] checking echochamber/rust_hex_grid against master#b61e69433951e31f7bd746e22f516a48ad41623b for prs-64470-and-65389
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fechochamber%2Frust_hex_grid" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/echochamber/rust_hex_grid on toolchain b61e69433951e31f7bd746e22f516a48ad41623b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/echochamber/rust_hex_grid
[INFO] finished tweaking git repo https://github.com/echochamber/rust_hex_grid
[INFO] tweaked toml for git repo https://github.com/echochamber/rust_hex_grid written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/echochamber/rust_hex_grid already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-4/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5ec11431ff9762b43358451b9c7ac7ed31d3f27d5311dde18ea2a3d8d9e87e1b
[INFO] running `"docker" "start" "-a" "5ec11431ff9762b43358451b9c7ac7ed31d3f27d5311dde18ea2a3d8d9e87e1b"`
[INFO] [stderr]     Checking piston-texture v0.4.0
[INFO] [stderr]     Checking draw_state v0.4.0
[INFO] [stderr]     Checking pistoncore-input v0.12.0
[INFO] [stderr]     Checking gfx_core v0.3.1
[INFO] [stderr]    Compiling glutin v0.5.2
[INFO] [stderr]     Checking freetype-rs v0.7.0
[INFO] [stderr]     Checking hex2d v0.1.0
[INFO] [stderr]     Checking image v0.9.1
[INFO] [stderr]     Checking piston2d-graphics v0.16.0
[INFO] [stderr]     Checking gfx_core v0.2.1
[INFO] [stderr]     Checking pistoncore-window v0.19.0
[INFO] [stderr]     Checking piston-ai_behavior v0.14.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.22.1
[INFO] [stderr]     Checking piston2d-sprite v0.26.0
[INFO] [stderr]     Checking piston v0.22.1
[INFO] [stderr]     Checking piston2d-opengl_graphics v0.28.2
[INFO] [stderr]     Checking pistoncore-glutin_window v0.26.1
[INFO] [stderr]     Checking gfx v0.10.2
[INFO] [stderr]     Checking gfx_device_gl v0.9.0
[INFO] [stderr]     Checking gfx_device_gl v0.10.0
[INFO] [stderr]     Checking piston-gfx_texture v0.14.0
[INFO] [stderr]     Checking piston2d-gfx_graphics v0.27.0
[INFO] [stderr]     Checking piston_window v0.45.0
[INFO] [stderr]     Checking board_v2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `render_args`
[INFO] [stderr]   --> src/main.rs:38:27
[INFO] [stderr]    |
[INFO] [stderr] 38 |             Event::Render(render_args) => {
[INFO] [stderr]    |                           ^^^^^^^^^^^ help: consider prefixing with an underscore: `_render_args`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `width`
[INFO] [stderr]   --> src/hex_board.rs:33:6
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let width = size * 1.732058;
[INFO] [stderr]    |         ^^^^^ help: consider prefixing with an underscore: `_width`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `height`
[INFO] [stderr]   --> src/hex_board.rs:34:6
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let height = size * 2.0;
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_height`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `current`
[INFO] [stderr]   --> src/hex_board.rs:51:7
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let current = i % 6;
[INFO] [stderr]    |             ^^^^^^^ help: consider prefixing with an underscore: `_current`
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `append` has been stable since 1.4.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(append)]
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/hex_board.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(append)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/hex_board.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(append)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `render_args`
[INFO] [stderr]   --> src/main.rs:38:27
[INFO] [stderr]    |
[INFO] [stderr] 38 |             Event::Render(render_args) => {
[INFO] [stderr]    |                           ^^^^^^^^^^^ help: consider prefixing with an underscore: `_render_args`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `width`
[INFO] [stderr]   --> src/hex_board.rs:33:6
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let width = size * 1.732058;
[INFO] [stderr]    |         ^^^^^ help: consider prefixing with an underscore: `_width`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `height`
[INFO] [stderr]   --> src/hex_board.rs:34:6
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let height = size * 2.0;
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_height`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `current`
[INFO] [stderr]   --> src/hex_board.rs:51:7
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let current = i % 6;
[INFO] [stderr]    |             ^^^^^^^ help: consider prefixing with an underscore: `_current`
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `append` has been stable since 1.4.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(append)]
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/hex_board.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(append)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/hex_board.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(append)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 47.81s
[INFO] running `"docker" "inspect" "5ec11431ff9762b43358451b9c7ac7ed31d3f27d5311dde18ea2a3d8d9e87e1b"`
[INFO] running `"docker" "rm" "-f" "5ec11431ff9762b43358451b9c7ac7ed31d3f27d5311dde18ea2a3d8d9e87e1b"`
[INFO] [stdout] 5ec11431ff9762b43358451b9c7ac7ed31d3f27d5311dde18ea2a3d8d9e87e1b