[INFO] updating cached repository ruggeri/sudoku_solver
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ruggeri/sudoku_solver
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ruggeri/sudoku_solver" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ruggeri/sudoku_solver"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ruggeri/sudoku_solver'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ruggeri/sudoku_solver" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ruggeri/sudoku_solver"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ruggeri/sudoku_solver'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d6f77304a6366925acd849c5f564446cb7245b76
[INFO] sha for GitHub repo ruggeri/sudoku_solver: d6f77304a6366925acd849c5f564446cb7245b76
[INFO] validating manifest of ruggeri/sudoku_solver on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ruggeri/sudoku_solver on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ruggeri/sudoku_solver
[INFO] finished frobbing ruggeri/sudoku_solver
[INFO] frobbed toml for ruggeri/sudoku_solver written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ruggeri/sudoku_solver/Cargo.toml
[INFO] started frobbing ruggeri/sudoku_solver
[INFO] finished frobbing ruggeri/sudoku_solver
[INFO] frobbed toml for ruggeri/sudoku_solver written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ruggeri/sudoku_solver/Cargo.toml
[INFO] crate ruggeri/sudoku_solver already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ruggeri/sudoku_solver against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-0/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ruggeri/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2c5f6245b48b4d4d1ba4dd33abad2c355e1ba6512815756fe26fc4d13bfec7fa
[INFO] running `"docker" "start" "-a" "2c5f6245b48b4d4d1ba4dd33abad2c355e1ba6512815756fe26fc4d13bfec7fa"`
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]     Checking rand v0.6.1
[INFO] [stderr]     Checking sudoku_solving v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]   --> src/checker/grid_checker.rs:68:11
[INFO] [stderr]    |
[INFO] [stderr] 68 |   #[allow(if_same_then_else)]
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unknown_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]    --> src/checker/grid_checker.rs:128:11
[INFO] [stderr]     |
[INFO] [stderr] 128 |   #[allow(if_same_then_else)]
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]    --> src/checker/grid_checker.rs:177:11
[INFO] [stderr]     |
[INFO] [stderr] 177 |   #[allow(if_same_then_else)]
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]   --> src/checker/group_checker.rs:42:11
[INFO] [stderr]    |
[INFO] [stderr] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `needless_bool`
[INFO] [stderr]   --> src/checker/group_checker.rs:42:30
[INFO] [stderr]    |
[INFO] [stderr] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stderr]    |                              ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]   --> src/checker/grid_checker.rs:68:11
[INFO] [stderr]    |
[INFO] [stderr] 68 |   #[allow(if_same_then_else)]
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unknown_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]    --> src/checker/grid_checker.rs:128:11
[INFO] [stderr]     |
[INFO] [stderr] 128 |   #[allow(if_same_then_else)]
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]    --> src/checker/grid_checker.rs:177:11
[INFO] [stderr]     |
[INFO] [stderr] 177 |   #[allow(if_same_then_else)]
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]   --> src/checker/group_checker.rs:42:11
[INFO] [stderr]    |
[INFO] [stderr] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `needless_bool`
[INFO] [stderr]   --> src/checker/group_checker.rs:42:30
[INFO] [stderr]    |
[INFO] [stderr] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stderr]    |                              ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `SudokuChoice`, `SudokuPosition`, `SudokuValue`
[INFO] [stderr]  --> src/main.rs:4:10
[INFO] [stderr]   |
[INFO] [stderr] 4 |   core::{SudokuChoice, SudokuGrid, SudokuPosition, SudokuValue},
[INFO] [stderr]   |          ^^^^^^^^^^^^              ^^^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `SudokuChoice`, `SudokuPosition`, `SudokuValue`
[INFO] [stderr]  --> src/main.rs:4:10
[INFO] [stderr]   |
[INFO] [stderr] 4 |   core::{SudokuChoice, SudokuGrid, SudokuPosition, SudokuValue},
[INFO] [stderr]   |          ^^^^^^^^^^^^              ^^^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.88s
[INFO] running `"docker" "inspect" "2c5f6245b48b4d4d1ba4dd33abad2c355e1ba6512815756fe26fc4d13bfec7fa"`
[INFO] running `"docker" "rm" "-f" "2c5f6245b48b4d4d1ba4dd33abad2c355e1ba6512815756fe26fc4d13bfec7fa"`
[INFO] [stdout] 2c5f6245b48b4d4d1ba4dd33abad2c355e1ba6512815756fe26fc4d13bfec7fa