Dec 19 12:11:27.605 INFO checking mvanniekerk/abelian_sandpile against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:11:27.605 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/mvanniekerk/abelian_sandpile:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:11:27.782 INFO [stdout] 6c9bce1572e066ae772b0b1cc195b1f29fc7b474cd205906ff38193f2cc55445
Dec 19 12:11:27.786 INFO running `"docker" "start" "-a" "6c9bce1572e066ae772b0b1cc195b1f29fc7b474cd205906ff38193f2cc55445"`
Dec 19 12:11:28.380 INFO [stderr]    Compiling num-derive v0.2.2
Dec 19 12:11:28.380 INFO [stderr]     Checking png v0.12.0
Dec 19 12:11:30.018 INFO [stderr]     Checking image v0.19.0
Dec 19 12:11:33.928 INFO [stderr]     Checking abelian_sandpile v0.1.0 (/opt/crater/workdir)
Dec 19 12:11:34.605 INFO [stderr] warning: function is never used: `print_map`
Dec 19 12:11:34.606 INFO [stderr]   --> src/main.rs:65:1
Dec 19 12:11:34.606 INFO [stderr]    |
Dec 19 12:11:34.606 INFO [stderr] 65 | fn print_map(map: &Map) {
Dec 19 12:11:34.606 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.607 INFO [stderr]    |
Dec 19 12:11:34.607 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 12:11:34.607 INFO [stderr] 
Dec 19 12:11:34.607 INFO [stderr] warning: function is never used: `add`
Dec 19 12:11:34.608 INFO [stderr]    --> src/main.rs:107:1
Dec 19 12:11:34.608 INFO [stderr]     |
Dec 19 12:11:34.608 INFO [stderr] 107 | fn add(one: &Map, two: &Map) -> Map {
Dec 19 12:11:34.608 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.609 INFO [stderr] 
Dec 19 12:11:34.609 INFO [stderr] warning: function is never used: `negate`
Dec 19 12:11:34.609 INFO [stderr]    --> src/main.rs:117:1
Dec 19 12:11:34.609 INFO [stderr]     |
Dec 19 12:11:34.610 INFO [stderr] 117 | fn negate(mat: &Map) -> Map {
Dec 19 12:11:34.610 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.610 INFO [stderr] 
Dec 19 12:11:34.610 INFO [stderr] warning: function is never used: `subtract`
Dec 19 12:11:34.610 INFO [stderr]    --> src/main.rs:127:1
Dec 19 12:11:34.610 INFO [stderr]     |
Dec 19 12:11:34.610 INFO [stderr] 127 | fn subtract(one: &Map, two: &Map) -> Map {
Dec 19 12:11:34.610 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.610 INFO [stderr] 
Dec 19 12:11:34.610 INFO [stderr] warning: function is never used: `identity`
Dec 19 12:11:34.610 INFO [stderr]    --> src/main.rs:131:1
Dec 19 12:11:34.610 INFO [stderr]     |
Dec 19 12:11:34.610 INFO [stderr] 131 | fn identity() -> Map {
Dec 19 12:11:34.610 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.610 INFO [stderr] 
Dec 19 12:11:34.610 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:34.610 INFO [stderr]    --> src/main.rs:157:5
Dec 19 12:11:34.610 INFO [stderr]     |
Dec 19 12:11:34.610 INFO [stderr] 157 |     create_dir_all(directory);
Dec 19 12:11:34.610 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.610 INFO [stderr]     |
Dec 19 12:11:34.610 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 12:11:34.610 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:34.610 INFO [stderr] 
Dec 19 12:11:34.706 INFO [stderr] warning: function is never used: `print_map`
Dec 19 12:11:34.706 INFO [stderr]   --> src/main.rs:65:1
Dec 19 12:11:34.706 INFO [stderr]    |
Dec 19 12:11:34.706 INFO [stderr] 65 | fn print_map(map: &Map) {
Dec 19 12:11:34.707 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.707 INFO [stderr]    |
Dec 19 12:11:34.707 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 12:11:34.707 INFO [stderr] 
Dec 19 12:11:34.707 INFO [stderr] warning: function is never used: `add`
Dec 19 12:11:34.707 INFO [stderr]    --> src/main.rs:107:1
Dec 19 12:11:34.707 INFO [stderr]     |
Dec 19 12:11:34.707 INFO [stderr] 107 | fn add(one: &Map, two: &Map) -> Map {
Dec 19 12:11:34.707 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.707 INFO [stderr] 
Dec 19 12:11:34.707 INFO [stderr] warning: function is never used: `negate`
Dec 19 12:11:34.707 INFO [stderr]    --> src/main.rs:117:1
Dec 19 12:11:34.707 INFO [stderr]     |
Dec 19 12:11:34.707 INFO [stderr] 117 | fn negate(mat: &Map) -> Map {
Dec 19 12:11:34.707 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.707 INFO [stderr] 
Dec 19 12:11:34.707 INFO [stderr] warning: function is never used: `subtract`
Dec 19 12:11:34.707 INFO [stderr]    --> src/main.rs:127:1
Dec 19 12:11:34.707 INFO [stderr]     |
Dec 19 12:11:34.707 INFO [stderr] 127 | fn subtract(one: &Map, two: &Map) -> Map {
Dec 19 12:11:34.707 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.707 INFO [stderr] 
Dec 19 12:11:34.707 INFO [stderr] warning: function is never used: `identity`
Dec 19 12:11:34.707 INFO [stderr]    --> src/main.rs:131:1
Dec 19 12:11:34.707 INFO [stderr]     |
Dec 19 12:11:34.707 INFO [stderr] 131 | fn identity() -> Map {
Dec 19 12:11:34.707 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.707 INFO [stderr] 
Dec 19 12:11:34.707 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:34.707 INFO [stderr]    --> src/main.rs:157:5
Dec 19 12:11:34.707 INFO [stderr]     |
Dec 19 12:11:34.707 INFO [stderr] 157 |     create_dir_all(directory);
Dec 19 12:11:34.707 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:34.707 INFO [stderr]     |
Dec 19 12:11:34.707 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 12:11:34.707 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:34.707 INFO [stderr] 
Dec 19 12:11:34.756 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.45s
Dec 19 12:11:35.866 INFO running `"docker" "inspect" "6c9bce1572e066ae772b0b1cc195b1f29fc7b474cd205906ff38193f2cc55445"`
Dec 19 12:11:36.104 INFO running `"docker" "rm" "-f" "6c9bce1572e066ae772b0b1cc195b1f29fc7b474cd205906ff38193f2cc55445"`
Dec 19 12:11:36.411 INFO [stdout] 6c9bce1572e066ae772b0b1cc195b1f29fc7b474cd205906ff38193f2cc55445