Dec 19 08:34:34.737 INFO checking sn99/mandelbrot against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 08:34:34.737 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/sn99/mandelbrot:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 08:34:35.232 INFO [stdout] 9238a4957aa89eca36f53ec7fb66ec964d3605a6934c81e844813ca277f67b4c
Dec 19 08:34:35.240 INFO running `"docker" "start" "-a" "9238a4957aa89eca36f53ec7fb66ec964d3605a6934c81e844813ca277f67b4c"`
Dec 19 08:34:37.072 INFO [stderr]    Compiling num-bigint v0.2.0
Dec 19 08:34:37.080 INFO [stderr]     Checking crossbeam-utils v0.6.3
Dec 19 08:34:37.089 INFO [stderr]    Compiling syn v0.15.15
Dec 19 08:34:37.089 INFO [stderr]     Checking rand v0.6.1
Dec 19 08:34:39.236 INFO [stderr]     Checking crossbeam-epoch v0.7.0
Dec 19 08:34:40.764 INFO [stderr]     Checking crossbeam-deque v0.6.3
Dec 19 08:34:42.660 INFO [stderr]     Checking parking_lot_core v0.4.0
Dec 19 08:34:44.304 INFO [stderr]     Checking parking_lot v0.7.0
Dec 19 08:34:44.644 INFO [stderr]     Checking num-rational v0.2.1
Dec 19 08:34:45.496 INFO [stderr]     Checking crossbeam-channel v0.3.4
Dec 19 08:34:46.357 INFO [stderr]     Checking num v0.2.0
Dec 19 08:34:47.947 INFO [stderr]     Checking crossbeam v0.6.0
Dec 19 08:34:53.110 INFO [stderr]    Compiling num-derive v0.2.3
Dec 19 08:34:58.105 INFO [stderr]     Checking tiff v0.2.1
Dec 19 08:34:58.735 INFO [stderr]     Checking image v0.20.1
Dec 19 08:35:03.245 INFO [stderr]     Checking mandelbrot v0.1.0 (/opt/crater/workdir)
Dec 19 08:35:03.616 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 08:35:03.616 INFO [stderr]    --> src/main.rs:141:9
Dec 19 08:35:03.616 INFO [stderr]     |
Dec 19 08:35:03.616 INFO [stderr] 141 | /         crossbeam::scope(|spawner| {
Dec 19 08:35:03.616 INFO [stderr] 142 | |             for (i, band) in bands.into_iter().enumerate() {
Dec 19 08:35:03.616 INFO [stderr] 143 | |                 let top = rows_per_band * i;
Dec 19 08:35:03.616 INFO [stderr] 144 | |                 let height = band.len() / bounds.0;
Dec 19 08:35:03.616 INFO [stderr] ...   |
Dec 19 08:35:03.616 INFO [stderr] 153 | |             }
Dec 19 08:35:03.616 INFO [stderr] 154 | |         });
Dec 19 08:35:03.616 INFO [stderr]     | |___________^
Dec 19 08:35:03.616 INFO [stderr]     |
Dec 19 08:35:03.616 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 08:35:03.616 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 08:35:03.616 INFO [stderr] 
Dec 19 08:35:03.676 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 08:35:03.676 INFO [stderr]    --> src/main.rs:141:9
Dec 19 08:35:03.676 INFO [stderr]     |
Dec 19 08:35:03.676 INFO [stderr] 141 | /         crossbeam::scope(|spawner| {
Dec 19 08:35:03.676 INFO [stderr] 142 | |             for (i, band) in bands.into_iter().enumerate() {
Dec 19 08:35:03.676 INFO [stderr] 143 | |                 let top = rows_per_band * i;
Dec 19 08:35:03.676 INFO [stderr] 144 | |                 let height = band.len() / bounds.0;
Dec 19 08:35:03.676 INFO [stderr] ...   |
Dec 19 08:35:03.676 INFO [stderr] 153 | |             }
Dec 19 08:35:03.676 INFO [stderr] 154 | |         });
Dec 19 08:35:03.676 INFO [stderr]     | |___________^
Dec 19 08:35:03.676 INFO [stderr]     |
Dec 19 08:35:03.676 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 08:35:03.676 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 08:35:03.676 INFO [stderr] 
Dec 19 08:35:03.694 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.83s
Dec 19 08:35:04.068 INFO running `"docker" "inspect" "9238a4957aa89eca36f53ec7fb66ec964d3605a6934c81e844813ca277f67b4c"`
Dec 19 08:35:04.362 INFO running `"docker" "rm" "-f" "9238a4957aa89eca36f53ec7fb66ec964d3605a6934c81e844813ca277f67b4c"`
Dec 19 08:35:04.772 INFO [stdout] 9238a4957aa89eca36f53ec7fb66ec964d3605a6934c81e844813ca277f67b4c