Dec 17 19:07:40.002 INFO checking mvanniekerk/abelian_sandpile against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 19:07:40.003 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 19:07:40.201 INFO [stdout] f8101fbda0ce3c333a88c59168e4e39fdae6e8cf23cc2cce579afbd0fb09c7de
Dec 17 19:07:40.203 INFO running `"docker" "start" "-a" "f8101fbda0ce3c333a88c59168e4e39fdae6e8cf23cc2cce579afbd0fb09c7de"`
Dec 17 19:07:40.811 INFO [stderr]    Compiling num-derive v0.2.2
Dec 17 19:07:40.811 INFO [stderr]     Checking png v0.12.0
Dec 17 19:07:40.811 INFO [stderr]     Checking jpeg-decoder v0.1.15
Dec 17 19:07:42.488 INFO [stderr]     Checking image v0.19.0
Dec 17 19:07:46.699 INFO [stderr]     Checking abelian_sandpile v0.1.0 (/opt/crater/workdir)
Dec 17 19:07:47.346 INFO [stderr] warning: function is never used: `print_map`
Dec 17 19:07:47.346 INFO [stderr]   --> src/main.rs:65:1
Dec 17 19:07:47.346 INFO [stderr]    |
Dec 17 19:07:47.347 INFO [stderr] 65 | fn print_map(map: &Map) {
Dec 17 19:07:47.347 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.347 INFO [stderr]    |
Dec 17 19:07:47.347 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 19:07:47.348 INFO [stderr] 
Dec 17 19:07:47.348 INFO [stderr] warning: function is never used: `add`
Dec 17 19:07:47.348 INFO [stderr]    --> src/main.rs:107:1
Dec 17 19:07:47.348 INFO [stderr]     |
Dec 17 19:07:47.349 INFO [stderr] 107 | fn add(one: &Map, two: &Map) -> Map {
Dec 17 19:07:47.349 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.349 INFO [stderr] 
Dec 17 19:07:47.349 INFO [stderr] warning: function is never used: `negate`
Dec 17 19:07:47.349 INFO [stderr]    --> src/main.rs:117:1
Dec 17 19:07:47.349 INFO [stderr]     |
Dec 17 19:07:47.349 INFO [stderr] 117 | fn negate(mat: &Map) -> Map {
Dec 17 19:07:47.349 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.349 INFO [stderr] 
Dec 17 19:07:47.350 INFO [stderr] warning: function is never used: `subtract`
Dec 17 19:07:47.350 INFO [stderr]    --> src/main.rs:127:1
Dec 17 19:07:47.350 INFO [stderr]     |
Dec 17 19:07:47.350 INFO [stderr] 127 | fn subtract(one: &Map, two: &Map) -> Map {
Dec 17 19:07:47.350 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.351 INFO [stderr] 
Dec 17 19:07:47.351 INFO [stderr] warning: function is never used: `identity`
Dec 17 19:07:47.351 INFO [stderr]    --> src/main.rs:131:1
Dec 17 19:07:47.351 INFO [stderr]     |
Dec 17 19:07:47.352 INFO [stderr] 131 | fn identity() -> Map {
Dec 17 19:07:47.352 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.352 INFO [stderr] 
Dec 17 19:07:47.352 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 19:07:47.353 INFO [stderr]    --> src/main.rs:157:5
Dec 17 19:07:47.353 INFO [stderr]     |
Dec 17 19:07:47.353 INFO [stderr] 157 |     create_dir_all(directory);
Dec 17 19:07:47.353 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.354 INFO [stderr]     |
Dec 17 19:07:47.354 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 17 19:07:47.354 INFO [stderr] warning: function is never used: `print_map`
Dec 17 19:07:47.354 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 19:07:47.355 INFO [stderr] 
Dec 17 19:07:47.355 INFO [stderr]   --> src/main.rs:65:1
Dec 17 19:07:47.355 INFO [stderr]    |
Dec 17 19:07:47.355 INFO [stderr] 65 | fn print_map(map: &Map) {
Dec 17 19:07:47.356 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.356 INFO [stderr]    |
Dec 17 19:07:47.356 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 19:07:47.356 INFO [stderr] 
Dec 17 19:07:47.357 INFO [stderr] warning: function is never used: `add`
Dec 17 19:07:47.357 INFO [stderr]    --> src/main.rs:107:1
Dec 17 19:07:47.357 INFO [stderr]     |
Dec 17 19:07:47.357 INFO [stderr] 107 | fn add(one: &Map, two: &Map) -> Map {
Dec 17 19:07:47.357 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.358 INFO [stderr] 
Dec 17 19:07:47.358 INFO [stderr] warning: function is never used: `negate`
Dec 17 19:07:47.358 INFO [stderr]    --> src/main.rs:117:1
Dec 17 19:07:47.358 INFO [stderr]     |
Dec 17 19:07:47.359 INFO [stderr] 117 | fn negate(mat: &Map) -> Map {
Dec 17 19:07:47.359 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.359 INFO [stderr] 
Dec 17 19:07:47.359 INFO [stderr] warning: function is never used: `subtract`
Dec 17 19:07:47.359 INFO [stderr]    --> src/main.rs:127:1
Dec 17 19:07:47.360 INFO [stderr]     |
Dec 17 19:07:47.360 INFO [stderr] 127 | fn subtract(one: &Map, two: &Map) -> Map {
Dec 17 19:07:47.360 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.360 INFO [stderr] 
Dec 17 19:07:47.361 INFO [stderr] warning: function is never used: `identity`
Dec 17 19:07:47.361 INFO [stderr]    --> src/main.rs:131:1
Dec 17 19:07:47.361 INFO [stderr]     |
Dec 17 19:07:47.361 INFO [stderr] 131 | fn identity() -> Map {
Dec 17 19:07:47.362 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.362 INFO [stderr] 
Dec 17 19:07:47.362 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 19:07:47.362 INFO [stderr]    --> src/main.rs:157:5
Dec 17 19:07:47.362 INFO [stderr]     |
Dec 17 19:07:47.363 INFO [stderr] 157 |     create_dir_all(directory);
Dec 17 19:07:47.363 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:07:47.363 INFO [stderr]     |
Dec 17 19:07:47.363 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 17 19:07:47.364 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 19:07:47.364 INFO [stderr] 
Dec 17 19:07:47.405 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.70s
Dec 17 19:07:48.400 INFO running `"docker" "inspect" "f8101fbda0ce3c333a88c59168e4e39fdae6e8cf23cc2cce579afbd0fb09c7de"`
Dec 17 19:07:48.676 INFO running `"docker" "rm" "-f" "f8101fbda0ce3c333a88c59168e4e39fdae6e8cf23cc2cce579afbd0fb09c7de"`
Dec 17 19:07:49.056 INFO [stdout] f8101fbda0ce3c333a88c59168e4e39fdae6e8cf23cc2cce579afbd0fb09c7de