Dec 18 08:50:32.994 INFO checking 02alexander/maze-solver against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 08:50:32.994 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/02alexander/maze-solver:/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 18 08:50:33.482 INFO [stdout] 01d4d0158c0825b8679f1ee9ce91f414657dabc77631746f3f4d8139cc49108a
Dec 18 08:50:33.484 INFO running `"docker" "start" "-a" "01d4d0158c0825b8679f1ee9ce91f414657dabc77631746f3f4d8139cc49108a"`
Dec 18 08:50:35.373 INFO [stderr]     Checking flate2 v0.2.20
Dec 18 08:50:36.408 INFO [stderr]     Checking imagefmt v4.0.0
Dec 18 08:50:38.064 INFO [stderr]     Checking maze-solver v0.1.0 (/opt/crater/workdir)
Dec 18 08:50:38.592 INFO [stderr] warning: unused imports: `read`, `write`
Dec 18 08:50:38.592 INFO [stderr]  --> src/main.rs:3:16
Dec 18 08:50:38.592 INFO [stderr]   |
Dec 18 08:50:38.592 INFO [stderr] 3 | use imagefmt::{read, write, ColFmt, ColType};
Dec 18 08:50:38.592 INFO [stderr]   |                ^^^^  ^^^^^
Dec 18 08:50:38.592 INFO [stderr]   |
Dec 18 08:50:38.592 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 08:50:38.592 INFO [stderr] 
Dec 18 08:50:38.593 INFO [stderr] warning: unused import: `std::mem::drop`
Dec 18 08:50:38.593 INFO [stderr]  --> src/tree.rs:2:5
Dec 18 08:50:38.593 INFO [stderr]   |
Dec 18 08:50:38.593 INFO [stderr] 2 | use std::mem::drop;
Dec 18 08:50:38.593 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 18 08:50:38.593 INFO [stderr] 
Dec 18 08:50:38.593 INFO [stderr] warning: unused import: `Node`
Dec 18 08:50:38.593 INFO [stderr]  --> src/path_to_end.rs:3:35
Dec 18 08:50:38.593 INFO [stderr]   |
Dec 18 08:50:38.593 INFO [stderr] 3 | use super::tree::{QuaternaryTree, Node, Link};
Dec 18 08:50:38.593 INFO [stderr]   |                                   ^^^^
Dec 18 08:50:38.593 INFO [stderr] 
Dec 18 08:50:38.664 INFO [stderr] warning: unused imports: `read`, `write`
Dec 18 08:50:38.664 INFO [stderr]  --> src/main.rs:3:16
Dec 18 08:50:38.664 INFO [stderr]   |
Dec 18 08:50:38.664 INFO [stderr] 3 | use imagefmt::{read, write, ColFmt, ColType};
Dec 18 08:50:38.664 INFO [stderr]   |                ^^^^  ^^^^^
Dec 18 08:50:38.664 INFO [stderr]   |
Dec 18 08:50:38.664 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 08:50:38.664 INFO [stderr] 
Dec 18 08:50:38.665 INFO [stderr] warning: unused import: `std::mem::drop`
Dec 18 08:50:38.665 INFO [stderr]  --> src/tree.rs:2:5
Dec 18 08:50:38.665 INFO [stderr]   |
Dec 18 08:50:38.665 INFO [stderr] 2 | use std::mem::drop;
Dec 18 08:50:38.665 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 18 08:50:38.665 INFO [stderr] 
Dec 18 08:50:38.792 INFO [stderr] warning: variable does not need to be mutable
Dec 18 08:50:38.793 INFO [stderr]   --> src/tree.rs:41:8
Dec 18 08:50:38.793 INFO [stderr]    |
Dec 18 08:50:38.793 INFO [stderr] 41 |             let mut cur = &mut *next.take().unwrap();
Dec 18 08:50:38.793 INFO [stderr]    |                 ----^^^
Dec 18 08:50:38.794 INFO [stderr]    |                 |
Dec 18 08:50:38.794 INFO [stderr]    |                 help: remove this `mut`
Dec 18 08:50:38.794 INFO [stderr]    |
Dec 18 08:50:38.794 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 08:50:38.795 INFO [stderr] 
Dec 18 08:50:38.823 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:50:38.823 INFO [stderr]   --> src/main.rs:20:2
Dec 18 08:50:38.823 INFO [stderr]    |
Dec 18 08:50:38.823 INFO [stderr] 20 |     imagefmt::write("out.bmp", maze.width, maze.height, ColFmt::RGB, &pixels, ColType::Auto);
Dec 18 08:50:38.823 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:50:38.824 INFO [stderr]    |
Dec 18 08:50:38.824 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 08:50:38.824 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:50:38.824 INFO [stderr] 
Dec 18 08:50:39.007 INFO [stderr] warning: variable does not need to be mutable
Dec 18 08:50:39.007 INFO [stderr]   --> src/tree.rs:41:8
Dec 18 08:50:39.007 INFO [stderr]    |
Dec 18 08:50:39.007 INFO [stderr] 41 |             let mut cur = &mut *next.take().unwrap();
Dec 18 08:50:39.007 INFO [stderr]    |                 ----^^^
Dec 18 08:50:39.007 INFO [stderr]    |                 |
Dec 18 08:50:39.007 INFO [stderr]    |                 help: remove this `mut`
Dec 18 08:50:39.007 INFO [stderr]    |
Dec 18 08:50:39.007 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 08:50:39.007 INFO [stderr] 
Dec 18 08:50:39.075 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:50:39.075 INFO [stderr]   --> src/main.rs:20:2
Dec 18 08:50:39.075 INFO [stderr]    |
Dec 18 08:50:39.075 INFO [stderr] 20 |     imagefmt::write("out.bmp", maze.width, maze.height, ColFmt::RGB, &pixels, ColType::Auto);
Dec 18 08:50:39.075 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:50:39.075 INFO [stderr]    |
Dec 18 08:50:39.075 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 08:50:39.076 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:50:39.076 INFO [stderr] 
Dec 18 08:50:39.123 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.83s
Dec 18 08:50:40.383 INFO running `"docker" "inspect" "01d4d0158c0825b8679f1ee9ce91f414657dabc77631746f3f4d8139cc49108a"`
Dec 18 08:50:40.652 INFO running `"docker" "rm" "-f" "01d4d0158c0825b8679f1ee9ce91f414657dabc77631746f3f4d8139cc49108a"`
Dec 18 08:50:40.978 INFO [stdout] 01d4d0158c0825b8679f1ee9ce91f414657dabc77631746f3f4d8139cc49108a