[INFO] updating cached repository andymaster01/tetris-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/andymaster01/tetris-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/andymaster01/tetris-rust" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/andymaster01/tetris-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/andymaster01/tetris-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/andymaster01/tetris-rust" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/andymaster01/tetris-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/andymaster01/tetris-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 112bc50cc9f09937e83878593c2c6eff53a2578a
[INFO] sha for GitHub repo andymaster01/tetris-rust: 112bc50cc9f09937e83878593c2c6eff53a2578a
[INFO] validating manifest of andymaster01/tetris-rust on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of andymaster01/tetris-rust on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing andymaster01/tetris-rust
[INFO] finished frobbing andymaster01/tetris-rust
[INFO] frobbed toml for andymaster01/tetris-rust written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/andymaster01/tetris-rust/Cargo.toml
[INFO] started frobbing andymaster01/tetris-rust
[INFO] finished frobbing andymaster01/tetris-rust
[INFO] frobbed toml for andymaster01/tetris-rust written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/andymaster01/tetris-rust/Cargo.toml
[INFO] crate andymaster01/tetris-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking andymaster01/tetris-rust against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-5/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/andymaster01/tetris-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 89a494f64aace0c38163e36b0b1116daced4f5a2aae9c86e84862d096b98036d
[INFO] running `"docker" "start" "-a" "89a494f64aace0c38163e36b0b1116daced4f5a2aae9c86e84862d096b98036d"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling csfml-system-sys v0.1.0 (https://github.com/jeremyletang/rust-sfml.git#ba02f79e)
[INFO] [stderr]    Compiling csfml-window-sys v0.1.1 (https://github.com/jeremyletang/rust-sfml.git#ba02f79e)
[INFO] [stderr]    Compiling csfml-audio-sys v0.1.0 (https://github.com/jeremyletang/rust-sfml.git#ba02f79e)
[INFO] [stderr]    Compiling csfml-graphics-sys v0.1.0 (https://github.com/jeremyletang/rust-sfml.git#ba02f79e)
[INFO] [stderr]    Compiling csfml-network-sys v0.1.0 (https://github.com/jeremyletang/rust-sfml.git#ba02f79e)
[INFO] [stderr]     Checking sfml v0.11.1 (https://github.com/jeremyletang/rust-sfml.git#ba02f79e)
[INFO] [stderr]     Checking tetris-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `M`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let M:i32 = 20;
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_M`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `N`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let N:i32 = 10;
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_N`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `field`
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let field: [[i32; 4]; 4]; 
[INFO] [stderr]    |         ^^^^^ help: consider prefixing with an underscore: `_field`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/main.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut b: [Point; 4] = [Point{x:0, y:0}; 4];
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut b: [Point; 4] = [Point{x:0, y:0}; 4];
[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: variable `M` should have a snake case name
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let M:i32 = 20;
[INFO] [stderr]   |         ^ help: convert the identifier to snake case: `m`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let N:i32 = 10;
[INFO] [stderr]   |         ^ help: convert the identifier to snake case: `n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `M`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let M:i32 = 20;
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_M`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `N`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let N:i32 = 10;
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_N`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `field`
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let field: [[i32; 4]; 4]; 
[INFO] [stderr]    |         ^^^^^ help: consider prefixing with an underscore: `_field`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/main.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut b: [Point; 4] = [Point{x:0, y:0}; 4];
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut b: [Point; 4] = [Point{x:0, y:0}; 4];
[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: variable `M` should have a snake case name
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let M:i32 = 20;
[INFO] [stderr]   |         ^ help: convert the identifier to snake case: `m`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let N:i32 = 10;
[INFO] [stderr]   |         ^ help: convert the identifier to snake case: `n`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.02s
[INFO] running `"docker" "inspect" "89a494f64aace0c38163e36b0b1116daced4f5a2aae9c86e84862d096b98036d"`
[INFO] running `"docker" "rm" "-f" "89a494f64aace0c38163e36b0b1116daced4f5a2aae9c86e84862d096b98036d"`
[INFO] [stdout] 89a494f64aace0c38163e36b0b1116daced4f5a2aae9c86e84862d096b98036d