[INFO] updating cached repository kaojo/sudojo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kaojo/sudojo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kaojo/sudojo" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/kaojo/sudojo"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/kaojo/sudojo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kaojo/sudojo" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/kaojo/sudojo"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/kaojo/sudojo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] adb8e9e8e6331231215574817f28e0db40b5b7a6
[INFO] sha for GitHub repo kaojo/sudojo: adb8e9e8e6331231215574817f28e0db40b5b7a6
[INFO] validating manifest of kaojo/sudojo on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of kaojo/sudojo on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing kaojo/sudojo
[INFO] finished frobbing kaojo/sudojo
[INFO] frobbed toml for kaojo/sudojo written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/kaojo/sudojo/Cargo.toml
[INFO] started frobbing kaojo/sudojo
[INFO] finished frobbing kaojo/sudojo
[INFO] frobbed toml for kaojo/sudojo written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/kaojo/sudojo/Cargo.toml
[INFO] crate kaojo/sudojo already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking kaojo/sudojo against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-7/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/kaojo/sudojo:/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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a89cc42a48f0feaf36705be014c81f1c61957584e7a9f0a38e033213a0cc6766
[INFO] running `"docker" "start" "-a" "a89cc42a48f0feaf36705be014c81f1c61957584e7a9f0a38e033213a0cc6766"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking sudojo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sudoku/game/board.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |         writeln!(f, "Board");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sudoku/game/board.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 writeln!(f, "-------------------------");
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sudoku/game/board.rs:59:21
[INFO] [stderr]    |
[INFO] [stderr] 59 |                     write!(f, "| ");
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sudoku/game/board.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 | /                 write!(
[INFO] [stderr] 62 | |                     f,
[INFO] [stderr] 63 | |                     "{} ",
[INFO] [stderr] 64 | |                     match self.get_square(&Coordinate::new(x, y))
[INFO] [stderr] ...  |
[INFO] [stderr] 70 | |                     }
[INFO] [stderr] 71 | |                 );
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sudoku/game/board.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |             writeln!(f, "|");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sudoku/game/board.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |         writeln!(f, "Board");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sudoku/game/board.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 writeln!(f, "-------------------------");
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sudoku/game/board.rs:59:21
[INFO] [stderr]    |
[INFO] [stderr] 59 |                     write!(f, "| ");
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sudoku/game/board.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 | /                 write!(
[INFO] [stderr] 62 | |                     f,
[INFO] [stderr] 63 | |                     "{} ",
[INFO] [stderr] 64 | |                     match self.get_square(&Coordinate::new(x, y))
[INFO] [stderr] ...  |
[INFO] [stderr] 70 | |                     }
[INFO] [stderr] 71 | |                 );
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sudoku/game/board.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |             writeln!(f, "|");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.85s
[INFO] running `"docker" "inspect" "a89cc42a48f0feaf36705be014c81f1c61957584e7a9f0a38e033213a0cc6766"`
[INFO] running `"docker" "rm" "-f" "a89cc42a48f0feaf36705be014c81f1c61957584e7a9f0a38e033213a0cc6766"`
[INFO] [stdout] a89cc42a48f0feaf36705be014c81f1c61957584e7a9f0a38e033213a0cc6766