Dec 19 19:07:22.773 INFO checking chc4/minesweeper against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:07:22.774 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/chc4/minesweeper:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 19:07:23.342 INFO [stdout] 931f0306e13e9855fd04e44a3ad65aa3549447e1f9457c442405312b4e8b626c
Dec 19 19:07:23.348 INFO running `"docker" "start" "-a" "931f0306e13e9855fd04e44a3ad65aa3549447e1f9457c442405312b4e8b626c"`
Dec 19 19:07:24.928 INFO [stderr]     Checking minesweeper v0.1.0 (/opt/crater/workdir)
Dec 19 19:07:25.368 INFO [stderr] warning: unused import: `std::io`
Dec 19 19:07:25.368 INFO [stderr]  --> src/main.rs:1:5
Dec 19 19:07:25.368 INFO [stderr]   |
Dec 19 19:07:25.368 INFO [stderr] 1 | use std::io;
Dec 19 19:07:25.368 INFO [stderr]   |     ^^^^^^^
Dec 19 19:07:25.376 INFO [stderr]   |
Dec 19 19:07:25.376 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 19:07:25.376 INFO [stderr] 
Dec 19 19:07:25.438 INFO [stderr] warning: unused import: `std::io`
Dec 19 19:07:25.438 INFO [stderr]  --> src/main.rs:1:5
Dec 19 19:07:25.438 INFO [stderr]   |
Dec 19 19:07:25.438 INFO [stderr] 1 | use std::io;
Dec 19 19:07:25.438 INFO [stderr]   |     ^^^^^^^
Dec 19 19:07:25.438 INFO [stderr]   |
Dec 19 19:07:25.438 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 19:07:25.438 INFO [stderr] 
Dec 19 19:07:25.565 INFO [stderr] warning: unused variable: `stdin`
Dec 19 19:07:25.565 INFO [stderr]    --> src/main.rs:183:9
Dec 19 19:07:25.565 INFO [stderr]     |
Dec 19 19:07:25.565 INFO [stderr] 183 |     let stdin = std::io::stdin();
Dec 19 19:07:25.565 INFO [stderr]     |         ^^^^^ help: consider using `_stdin` instead
Dec 19 19:07:25.565 INFO [stderr]     |
Dec 19 19:07:25.565 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 19:07:25.565 INFO [stderr] 
Dec 19 19:07:25.565 INFO [stderr] warning: unused variable: `i`
Dec 19 19:07:25.565 INFO [stderr]   --> src/main.rs:56:13
Dec 19 19:07:25.565 INFO [stderr]    |
Dec 19 19:07:25.565 INFO [stderr] 56 |         for i in 0..y {
Dec 19 19:07:25.565 INFO [stderr]    |             ^ help: consider using `_i` instead
Dec 19 19:07:25.565 INFO [stderr] 
Dec 19 19:07:25.565 INFO [stderr] warning: unused variable: `j`
Dec 19 19:07:25.565 INFO [stderr]   --> src/main.rs:58:17
Dec 19 19:07:25.565 INFO [stderr]    |
Dec 19 19:07:25.565 INFO [stderr] 58 |             for j in 0..x {
Dec 19 19:07:25.565 INFO [stderr]    |                 ^ help: consider using `_j` instead
Dec 19 19:07:25.565 INFO [stderr] 
Dec 19 19:07:25.565 INFO [stderr] warning: unused variable: `count`
Dec 19 19:07:25.565 INFO [stderr]    --> src/main.rs:108:36
Dec 19 19:07:25.565 INFO [stderr]     |
Dec 19 19:07:25.565 INFO [stderr] 108 |         if let Slot::Empty(visible,count) = slot {
Dec 19 19:07:25.565 INFO [stderr]     |                                    ^^^^^ help: consider using `_count` instead
Dec 19 19:07:25.565 INFO [stderr] 
Dec 19 19:07:25.588 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:07:25.588 INFO [stderr]   --> src/main.rs:30:9
Dec 19 19:07:25.588 INFO [stderr]    |
Dec 19 19:07:25.588 INFO [stderr] 30 |     let mut stdin = std::io::stdin();
Dec 19 19:07:25.588 INFO [stderr]    |         ----^^^^^
Dec 19 19:07:25.588 INFO [stderr]    |         |
Dec 19 19:07:25.588 INFO [stderr]    |         help: remove this `mut`
Dec 19 19:07:25.588 INFO [stderr]    |
Dec 19 19:07:25.588 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 19:07:25.588 INFO [stderr] 
Dec 19 19:07:25.616 INFO [stderr] warning: unused variable: `stdin`
Dec 19 19:07:25.616 INFO [stderr]    --> src/main.rs:183:9
Dec 19 19:07:25.616 INFO [stderr]     |
Dec 19 19:07:25.616 INFO [stderr] 183 |     let stdin = std::io::stdin();
Dec 19 19:07:25.616 INFO [stderr]     |         ^^^^^ help: consider using `_stdin` instead
Dec 19 19:07:25.616 INFO [stderr]     |
Dec 19 19:07:25.616 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 19:07:25.616 INFO [stderr] 
Dec 19 19:07:25.616 INFO [stderr] warning: unused variable: `i`
Dec 19 19:07:25.616 INFO [stderr]   --> src/main.rs:56:13
Dec 19 19:07:25.616 INFO [stderr]    |
Dec 19 19:07:25.616 INFO [stderr] 56 |         for i in 0..y {
Dec 19 19:07:25.616 INFO [stderr]    |             ^ help: consider using `_i` instead
Dec 19 19:07:25.616 INFO [stderr] 
Dec 19 19:07:25.616 INFO [stderr] warning: unused variable: `j`
Dec 19 19:07:25.616 INFO [stderr]   --> src/main.rs:58:17
Dec 19 19:07:25.616 INFO [stderr]    |
Dec 19 19:07:25.616 INFO [stderr] 58 |             for j in 0..x {
Dec 19 19:07:25.616 INFO [stderr]    |                 ^ help: consider using `_j` instead
Dec 19 19:07:25.616 INFO [stderr] 
Dec 19 19:07:25.616 INFO [stderr] warning: unused variable: `count`
Dec 19 19:07:25.616 INFO [stderr]    --> src/main.rs:108:36
Dec 19 19:07:25.616 INFO [stderr]     |
Dec 19 19:07:25.616 INFO [stderr] 108 |         if let Slot::Empty(visible,count) = slot {
Dec 19 19:07:25.617 INFO [stderr]     |                                    ^^^^^ help: consider using `_count` instead
Dec 19 19:07:25.617 INFO [stderr] 
Dec 19 19:07:25.631 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:07:25.631 INFO [stderr]   --> src/main.rs:30:9
Dec 19 19:07:25.631 INFO [stderr]    |
Dec 19 19:07:25.631 INFO [stderr] 30 |     let mut stdin = std::io::stdin();
Dec 19 19:07:25.631 INFO [stderr]    |         ----^^^^^
Dec 19 19:07:25.631 INFO [stderr]    |         |
Dec 19 19:07:25.631 INFO [stderr]    |         help: remove this `mut`
Dec 19 19:07:25.631 INFO [stderr]    |
Dec 19 19:07:25.631 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 19:07:25.631 INFO [stderr] 
Dec 19 19:07:25.764 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
Dec 19 19:07:26.509 INFO running `"docker" "inspect" "931f0306e13e9855fd04e44a3ad65aa3549447e1f9457c442405312b4e8b626c"`
Dec 19 19:07:26.752 INFO running `"docker" "rm" "-f" "931f0306e13e9855fd04e44a3ad65aa3549447e1f9457c442405312b4e8b626c"`
Dec 19 19:07:27.119 INFO [stdout] 931f0306e13e9855fd04e44a3ad65aa3549447e1f9457c442405312b4e8b626c