[INFO] cloning repository flada-auxv/game_of_life-rust
[INFO] running `"git" "clone" "--bare" "git://github.com/flada-auxv/game_of_life-rust.git" "work/cache/sources/gh/flada-auxv/game_of_life-rust"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/flada-auxv/game_of_life-rust'...
[INFO] running `"git" "clone" "work/cache/sources/gh/flada-auxv/game_of_life-rust" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/flada-auxv/game_of_life-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/flada-auxv/game_of_life-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/flada-auxv/game_of_life-rust" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/flada-auxv/game_of_life-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/flada-auxv/game_of_life-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f33ec39482e813b389597d0388895cddd396d5fd
[INFO] sha for GitHub repo flada-auxv/game_of_life-rust: f33ec39482e813b389597d0388895cddd396d5fd
[INFO] validating manifest of flada-auxv/game_of_life-rust on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of flada-auxv/game_of_life-rust on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing flada-auxv/game_of_life-rust
[INFO] finished frobbing flada-auxv/game_of_life-rust
[INFO] frobbed toml for flada-auxv/game_of_life-rust written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/flada-auxv/game_of_life-rust/Cargo.toml
[INFO] started frobbing flada-auxv/game_of_life-rust
[INFO] finished frobbing flada-auxv/game_of_life-rust
[INFO] frobbed toml for flada-auxv/game_of_life-rust written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/flada-auxv/game_of_life-rust/Cargo.toml
[INFO] crate flada-auxv/game_of_life-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking flada-auxv/game_of_life-rust against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-6/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/flada-auxv/game_of_life-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4f93d84d481fe86697cc2bdf27015e79edf3423ee72ad9f775b84c31595f964d
[INFO] running `"docker" "start" "-a" "4f93d84d481fe86697cc2bdf27015e79edf3423ee72ad9f775b84c31595f964d"`
[INFO] [stderr]     Checking game_of_life v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:95:18
[INFO] [stderr]    |
[INFO] [stderr] 95 |         for x in (0..self.height) {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:96:22
[INFO] [stderr]    |
[INFO] [stderr] 96 |             for y in (0..self.width) {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let mut reader = io::stdin();
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:95:18
[INFO] [stderr]    |
[INFO] [stderr] 95 |         for x in (0..self.height) {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:96:22
[INFO] [stderr]    |
[INFO] [stderr] 96 |             for y in (0..self.width) {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let mut reader = io::stdin();
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `"docker" "inspect" "4f93d84d481fe86697cc2bdf27015e79edf3423ee72ad9f775b84c31595f964d"`
[INFO] running `"docker" "rm" "-f" "4f93d84d481fe86697cc2bdf27015e79edf3423ee72ad9f775b84c31595f964d"`
[INFO] [stdout] 4f93d84d481fe86697cc2bdf27015e79edf3423ee72ad9f775b84c31595f964d