[INFO] cloning repository ffjanp/sudoku_solver
[INFO] running `"git" "clone" "--bare" "git://github.com/ffjanp/sudoku_solver.git" "work/cache/sources/gh/ffjanp/sudoku_solver"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/ffjanp/sudoku_solver'...
[INFO] running `"git" "clone" "work/cache/sources/gh/ffjanp/sudoku_solver" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/sudoku_solver"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/sudoku_solver'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ffjanp/sudoku_solver" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ffjanp/sudoku_solver"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ffjanp/sudoku_solver'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a5129652558878ae06295ea3b7cf9317f731f6c9
[INFO] sha for GitHub repo ffjanp/sudoku_solver: a5129652558878ae06295ea3b7cf9317f731f6c9
[INFO] validating manifest of ffjanp/sudoku_solver on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ffjanp/sudoku_solver on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ffjanp/sudoku_solver
[INFO] finished frobbing ffjanp/sudoku_solver
[INFO] frobbed toml for ffjanp/sudoku_solver written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/sudoku_solver/Cargo.toml
[INFO] started frobbing ffjanp/sudoku_solver
[INFO] finished frobbing ffjanp/sudoku_solver
[INFO] frobbed toml for ffjanp/sudoku_solver written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ffjanp/sudoku_solver/Cargo.toml
[INFO] crate ffjanp/sudoku_solver already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ffjanp/sudoku_solver against master#c8865d8e195813ade6b84434ac9f8850e7112d1a for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/sudoku_solver:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "build" "--frozen"`
[INFO] [stdout] aeefc59404bb028159a9e8536202680d54334eba9eab5cf8b0c39f606ec40137
[INFO] running `"docker" "start" "-a" "aeefc59404bb028159a9e8536202680d54334eba9eab5cf8b0c39f606ec40137"`
[INFO] [stderr]    Compiling find_transaction v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:72:25
[INFO] [stderr]    |
[INFO] [stderr] 72 |                     let mut possible = self.check(x,y);
[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 1.11s
[INFO] running `"docker" "inspect" "aeefc59404bb028159a9e8536202680d54334eba9eab5cf8b0c39f606ec40137"`
[INFO] running `"docker" "rm" "-f" "aeefc59404bb028159a9e8536202680d54334eba9eab5cf8b0c39f606ec40137"`
[INFO] [stdout] aeefc59404bb028159a9e8536202680d54334eba9eab5cf8b0c39f606ec40137
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/sudoku_solver:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 844c967474ec5bccbbd999b03ab7b8ab219fd3a91244a105063ee2b5fa72e924
[INFO] running `"docker" "start" "-a" "844c967474ec5bccbbd999b03ab7b8ab219fd3a91244a105063ee2b5fa72e924"`
[INFO] [stderr]    Compiling find_transaction v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:72:25
[INFO] [stderr]    |
[INFO] [stderr] 72 |                     let mut possible = self.check(x,y);
[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 0.35s
[INFO] running `"docker" "inspect" "844c967474ec5bccbbd999b03ab7b8ab219fd3a91244a105063ee2b5fa72e924"`
[INFO] running `"docker" "rm" "-f" "844c967474ec5bccbbd999b03ab7b8ab219fd3a91244a105063ee2b5fa72e924"`
[INFO] [stdout] 844c967474ec5bccbbd999b03ab7b8ab219fd3a91244a105063ee2b5fa72e924
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ffjanp/sudoku_solver:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen"`
[INFO] [stdout] f6192aefff625a6ff8b5088e4ad4f7dcd8f6c68bb57fad417498df274c2b0c5e
[INFO] running `"docker" "start" "-a" "f6192aefff625a6ff8b5088e4ad4f7dcd8f6c68bb57fad417498df274c2b0c5e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/find_transaction-e3a8bc3a5c5bc9e6
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f6192aefff625a6ff8b5088e4ad4f7dcd8f6c68bb57fad417498df274c2b0c5e"`
[INFO] running `"docker" "rm" "-f" "f6192aefff625a6ff8b5088e4ad4f7dcd8f6c68bb57fad417498df274c2b0c5e"`
[INFO] [stdout] f6192aefff625a6ff8b5088e4ad4f7dcd8f6c68bb57fad417498df274c2b0c5e