[INFO] updating cached repository jaywunder/sudoku
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jaywunder/sudoku
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jaywunder/sudoku" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/jaywunder/sudoku"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/jaywunder/sudoku'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jaywunder/sudoku" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/jaywunder/sudoku"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/jaywunder/sudoku'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9487c3c6330f8b9b8dd6335965a8997a7b6b9d96
[INFO] sha for GitHub repo jaywunder/sudoku: 9487c3c6330f8b9b8dd6335965a8997a7b6b9d96
[INFO] validating manifest of jaywunder/sudoku on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jaywunder/sudoku on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jaywunder/sudoku
[INFO] finished frobbing jaywunder/sudoku
[INFO] frobbed toml for jaywunder/sudoku written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/jaywunder/sudoku/Cargo.toml
[INFO] started frobbing jaywunder/sudoku
[INFO] finished frobbing jaywunder/sudoku
[INFO] frobbed toml for jaywunder/sudoku written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/jaywunder/sudoku/Cargo.toml
[INFO] crate jaywunder/sudoku already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking jaywunder/sudoku against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-0/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/jaywunder/sudoku:/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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 014c6e22677f381b4a3d6b4e7bbe3171a6b4d2bdb2816c6ec85d511f2de218e4
[INFO] running `"docker" "start" "-a" "014c6e22677f381b4a3d6b4e7bbe3171a6b4d2bdb2816c6ec85d511f2de218e4"`
[INFO] [stderr]     Checking csv v0.15.0
[INFO] [stderr]     Checking sudoku v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/file_io.rs:17:55
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn board_from_file(path: &Path) -> Result<Board, &error::Error> {
[INFO] [stderr]    |                                                       ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/file_io.rs:54:72
[INFO] [stderr]    |
[INFO] [stderr] 54 | pub fn board_to_file<'a>(path: &Path, board: &Board) -> Result<(), &'a error::Error> {
[INFO] [stderr]    |                                                                        ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/file_io.rs:17:55
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn board_from_file(path: &Path) -> Result<Board, &error::Error> {
[INFO] [stderr]    |                                                       ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/file_io.rs:54:72
[INFO] [stderr]    |
[INFO] [stderr] 54 | pub fn board_to_file<'a>(path: &Path, board: &Board) -> Result<(), &'a error::Error> {
[INFO] [stderr]    |                                                                        ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.15s
[INFO] running `"docker" "inspect" "014c6e22677f381b4a3d6b4e7bbe3171a6b4d2bdb2816c6ec85d511f2de218e4"`
[INFO] running `"docker" "rm" "-f" "014c6e22677f381b4a3d6b4e7bbe3171a6b4d2bdb2816c6ec85d511f2de218e4"`
[INFO] [stdout] 014c6e22677f381b4a3d6b4e7bbe3171a6b4d2bdb2816c6ec85d511f2de218e4