[INFO] cloning repository ErikPartridge/sudoku-generator
[INFO] running `"git" "clone" "--bare" "git://github.com/ErikPartridge/sudoku-generator.git" "work/cache/sources/gh/ErikPartridge/sudoku-generator"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/ErikPartridge/sudoku-generator'...
[INFO] running `"git" "clone" "work/cache/sources/gh/ErikPartridge/sudoku-generator" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ErikPartridge/sudoku-generator"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ErikPartridge/sudoku-generator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ErikPartridge/sudoku-generator" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ErikPartridge/sudoku-generator"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ErikPartridge/sudoku-generator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] abf3fb1b85c4b234c8d333af646357ec631d53d2
[INFO] sha for GitHub repo ErikPartridge/sudoku-generator: abf3fb1b85c4b234c8d333af646357ec631d53d2
[INFO] validating manifest of ErikPartridge/sudoku-generator 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 ErikPartridge/sudoku-generator 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 ErikPartridge/sudoku-generator
[INFO] finished frobbing ErikPartridge/sudoku-generator
[INFO] frobbed toml for ErikPartridge/sudoku-generator written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/ErikPartridge/sudoku-generator/Cargo.toml
[INFO] started frobbing ErikPartridge/sudoku-generator
[INFO] finished frobbing ErikPartridge/sudoku-generator
[INFO] frobbed toml for ErikPartridge/sudoku-generator written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ErikPartridge/sudoku-generator/Cargo.toml
[INFO] crate ErikPartridge/sudoku-generator 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 ErikPartridge/sudoku-generator against try#e212b7d492c96d3837691ba29d32d5f468933fb8 for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-0/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ErikPartridge/sudoku-generator:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "build" "--frozen"`
[INFO] [stdout] da20391749a7d638e1482f57896915c68069a36043fcf9fb386fc36be52af9a3
[INFO] running `"docker" "start" "-a" "da20391749a7d638e1482f57896915c68069a36043fcf9fb386fc36be52af9a3"`
[INFO] [stderr]    Compiling sudoku-generator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `freedom::Freedom`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use freedom::Freedom;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `problem::Problem`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use problem::Problem;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]   --> src/freedom.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     for j in 0..3 {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_j`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ORDER`
[INFO] [stderr]  --> src/freedom.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | const ORDER: u8 = 3;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `DIM`
[INFO] [stderr]  --> src/freedom.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | const DIM: u8 = ORDER * ORDER;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ELEMENTS`
[INFO] [stderr]  --> src/freedom.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | const ELEMENTS: u8 = DIM * DIM;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ALL_VALUES`
[INFO] [stderr]  --> src/freedom.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | const ALL_VALUES: u16 = (1 << DIM) - 1;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Freedom`
[INFO] [stderr]  --> src/freedom.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Freedom {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `singleton`
[INFO] [stderr]   --> src/freedom.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn singleton(v: u16) -> u16 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `freedom_eliminate`
[INFO] [stderr]   --> src/freedom.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn freedom_eliminate(f: &Freedom, col: u16, row: u16, value: u16) -> Freedom {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_freedom`
[INFO] [stderr]   --> src/freedom.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn create_freedom(problem: &Problem) -> Freedom {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sanity_check`
[INFO] [stderr]   --> src/freedom.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn sanity_check(problem: &Problem, freedom: &Freedom) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `search_least_free`
[INFO] [stderr]   --> src/freedom.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn search_least_free(problem: &Problem, freedom: &Freedom) -> u16 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Problem`
[INFO] [stderr]  --> src/problem.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Problem {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `"docker" "inspect" "da20391749a7d638e1482f57896915c68069a36043fcf9fb386fc36be52af9a3"`
[INFO] running `"docker" "rm" "-f" "da20391749a7d638e1482f57896915c68069a36043fcf9fb386fc36be52af9a3"`
[INFO] [stdout] da20391749a7d638e1482f57896915c68069a36043fcf9fb386fc36be52af9a3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-0/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ErikPartridge/sudoku-generator:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] ee95322b943b6013e10c7bf52deb7096cb3ff4a4f282f3dda0a71479d2458c86
[INFO] running `"docker" "start" "-a" "ee95322b943b6013e10c7bf52deb7096cb3ff4a4f282f3dda0a71479d2458c86"`
[INFO] [stderr]    Compiling sudoku-generator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `freedom::Freedom`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use freedom::Freedom;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `problem::Problem`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use problem::Problem;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]   --> src/freedom.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     for j in 0..3 {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_j`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ORDER`
[INFO] [stderr]  --> src/freedom.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | const ORDER: u8 = 3;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `DIM`
[INFO] [stderr]  --> src/freedom.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | const DIM: u8 = ORDER * ORDER;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ELEMENTS`
[INFO] [stderr]  --> src/freedom.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | const ELEMENTS: u8 = DIM * DIM;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ALL_VALUES`
[INFO] [stderr]  --> src/freedom.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | const ALL_VALUES: u16 = (1 << DIM) - 1;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Freedom`
[INFO] [stderr]  --> src/freedom.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Freedom {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `singleton`
[INFO] [stderr]   --> src/freedom.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn singleton(v: u16) -> u16 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `freedom_eliminate`
[INFO] [stderr]   --> src/freedom.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn freedom_eliminate(f: &Freedom, col: u16, row: u16, value: u16) -> Freedom {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_freedom`
[INFO] [stderr]   --> src/freedom.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn create_freedom(problem: &Problem) -> Freedom {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sanity_check`
[INFO] [stderr]   --> src/freedom.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn sanity_check(problem: &Problem, freedom: &Freedom) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `search_least_free`
[INFO] [stderr]   --> src/freedom.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn search_least_free(problem: &Problem, freedom: &Freedom) -> u16 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Problem`
[INFO] [stderr]  --> src/problem.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Problem {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `"docker" "inspect" "ee95322b943b6013e10c7bf52deb7096cb3ff4a4f282f3dda0a71479d2458c86"`
[INFO] running `"docker" "rm" "-f" "ee95322b943b6013e10c7bf52deb7096cb3ff4a4f282f3dda0a71479d2458c86"`
[INFO] [stdout] ee95322b943b6013e10c7bf52deb7096cb3ff4a4f282f3dda0a71479d2458c86
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-0/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/ErikPartridge/sudoku-generator:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen"`
[INFO] [stdout] 266699f547d42e00064ecadcb60e5783d262f1638338d9dc8b1f90436e0d2be6
[INFO] running `"docker" "start" "-a" "266699f547d42e00064ecadcb60e5783d262f1638338d9dc8b1f90436e0d2be6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sudoku_generator-870236dc5044aeea
[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" "266699f547d42e00064ecadcb60e5783d262f1638338d9dc8b1f90436e0d2be6"`
[INFO] running `"docker" "rm" "-f" "266699f547d42e00064ecadcb60e5783d262f1638338d9dc8b1f90436e0d2be6"`
[INFO] [stdout] 266699f547d42e00064ecadcb60e5783d262f1638338d9dc8b1f90436e0d2be6