[INFO] updating cached repository slavovojacek/8QP_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/slavovojacek/8QP_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/slavovojacek/8QP_rust" "work/ex/pr-59527/sources/master#003382e4150984cb476047b3925edf8d75df2d59/gh/slavovojacek/8QP_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-59527/sources/master#003382e4150984cb476047b3925edf8d75df2d59/gh/slavovojacek/8QP_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/slavovojacek/8QP_rust" "work/ex/pr-59527/sources/try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00/gh/slavovojacek/8QP_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-59527/sources/try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00/gh/slavovojacek/8QP_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d954f74f594f63fe348d514e1cdd08ecc3d3580f
[INFO] sha for GitHub repo slavovojacek/8QP_rust: d954f74f594f63fe348d514e1cdd08ecc3d3580f
[INFO] validating manifest of slavovojacek/8QP_rust on toolchain master#003382e4150984cb476047b3925edf8d75df2d59
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+003382e4150984cb476047b3925edf8d75df2d59-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of slavovojacek/8QP_rust on toolchain try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+47f4f94676fbdd494dd2c2dc9ac377a13fc78e00-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing slavovojacek/8QP_rust
[INFO] finished frobbing slavovojacek/8QP_rust
[INFO] frobbed toml for slavovojacek/8QP_rust written to work/ex/pr-59527/sources/master#003382e4150984cb476047b3925edf8d75df2d59/gh/slavovojacek/8QP_rust/Cargo.toml
[INFO] started frobbing slavovojacek/8QP_rust
[INFO] finished frobbing slavovojacek/8QP_rust
[INFO] frobbed toml for slavovojacek/8QP_rust written to work/ex/pr-59527/sources/try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00/gh/slavovojacek/8QP_rust/Cargo.toml
[INFO] crate slavovojacek/8QP_rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+003382e4150984cb476047b3925edf8d75df2d59-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+47f4f94676fbdd494dd2c2dc9ac377a13fc78e00-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking slavovojacek/8QP_rust against master#003382e4150984cb476047b3925edf8d75df2d59 for pr-59527
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59527/worker-0/master#003382e4150984cb476047b3925edf8d75df2d59:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59527/sources/master#003382e4150984cb476047b3925edf8d75df2d59/gh/slavovojacek/8QP_rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+003382e4150984cb476047b3925edf8d75df2d59-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 78abc077131f232797ab6acc70e7dea01ca133ba2fc47b44875324718b7e9c08
[INFO] running `"docker" "start" "-a" "78abc077131f232797ab6acc70e7dea01ca133ba2fc47b44875324718b7e9c08"`
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking eight_queen_problem v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `empty_squares` is never read
[INFO] [stderr]   --> src/main.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let mut empty_squares: Vec<Position> = Vec::new();
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r`
[INFO] [stderr]    --> src/main.rs:113:33
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
[INFO] [stderr]     |                                 ^ help: consider prefixing with an underscore: `_r`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `empty_squares` is never read
[INFO] [stderr]   --> src/main.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let mut empty_squares: Vec<Position> = Vec::new();
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r`
[INFO] [stderr]    --> src/main.rs:113:33
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
[INFO] [stderr]     |                                 ^ help: consider prefixing with an underscore: `_r`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `"docker" "inspect" "78abc077131f232797ab6acc70e7dea01ca133ba2fc47b44875324718b7e9c08"`
[INFO] running `"docker" "rm" "-f" "78abc077131f232797ab6acc70e7dea01ca133ba2fc47b44875324718b7e9c08"`
[INFO] [stdout] 78abc077131f232797ab6acc70e7dea01ca133ba2fc47b44875324718b7e9c08