Dec 05 03:46:29.053 INFO checking 02alexander/maze-solver against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 03:46:29.053 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 03:46:29.541 INFO [stdout] 957ecbe238f5d4195345689d246904516d8b43205e7d2429709e86d824de58e9
Dec 05 03:46:29.546 INFO running `"docker" "start" "-a" "957ecbe238f5d4195345689d246904516d8b43205e7d2429709e86d824de58e9"`
Dec 05 03:46:30.010 INFO [stderr] usermod: no changes
Dec 05 03:46:30.055 INFO [stderr]     Checking imagefmt v4.0.0
Dec 05 03:46:31.537 INFO [stderr]     Checking maze-solver v0.1.0 (/source)
Dec 05 03:46:32.077 INFO [stderr] warning: unused imports: `read`, `write`
Dec 05 03:46:32.077 INFO [stderr]  --> src/main.rs:3:16
Dec 05 03:46:32.077 INFO [stderr]   |
Dec 05 03:46:32.078 INFO [stderr] 3 | use imagefmt::{read, write, ColFmt, ColType};
Dec 05 03:46:32.078 INFO [stderr]   |                ^^^^  ^^^^^
Dec 05 03:46:32.078 INFO [stderr]   |
Dec 05 03:46:32.078 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 05 03:46:32.078 INFO [stderr] 
Dec 05 03:46:32.078 INFO [stderr] warning: unused import: `std::mem::drop`
Dec 05 03:46:32.078 INFO [stderr]  --> src/tree.rs:2:5
Dec 05 03:46:32.078 INFO [stderr]   |
Dec 05 03:46:32.078 INFO [stderr] 2 | use std::mem::drop;
Dec 05 03:46:32.078 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 05 03:46:32.078 INFO [stderr] 
Dec 05 03:46:32.078 INFO [stderr] warning: unused import: `Node`
Dec 05 03:46:32.079 INFO [stderr]  --> src/path_to_end.rs:3:35
Dec 05 03:46:32.079 INFO [stderr]   |
Dec 05 03:46:32.079 INFO [stderr] 3 | use super::tree::{QuaternaryTree, Node, Link};
Dec 05 03:46:32.079 INFO [stderr]   |                                   ^^^^
Dec 05 03:46:32.080 INFO [stderr] 
Dec 05 03:46:32.202 INFO [stderr] warning: variable does not need to be mutable
Dec 05 03:46:32.202 INFO [stderr]   --> src/tree.rs:41:8
Dec 05 03:46:32.202 INFO [stderr]    |
Dec 05 03:46:32.203 INFO [stderr] 41 |             let mut cur = &mut *next.take().unwrap();
Dec 05 03:46:32.203 INFO [stderr]    |                 ----^^^
Dec 05 03:46:32.203 INFO [stderr]    |                 |
Dec 05 03:46:32.203 INFO [stderr]    |                 help: remove this `mut`
Dec 05 03:46:32.204 INFO [stderr]    |
Dec 05 03:46:32.204 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 03:46:32.204 INFO [stderr] 
Dec 05 03:46:32.223 INFO [stderr] warning: unused imports: `read`, `write`
Dec 05 03:46:32.223 INFO [stderr]  --> src/main.rs:3:16
Dec 05 03:46:32.223 INFO [stderr]   |
Dec 05 03:46:32.224 INFO [stderr] 3 | use imagefmt::{read, write, ColFmt, ColType};
Dec 05 03:46:32.224 INFO [stderr]   |                ^^^^  ^^^^^
Dec 05 03:46:32.224 INFO [stderr]   |
Dec 05 03:46:32.224 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 05 03:46:32.224 INFO [stderr] 
Dec 05 03:46:32.225 INFO [stderr] warning: unused import: `std::mem::drop`
Dec 05 03:46:32.225 INFO [stderr]  --> src/tree.rs:2:5
Dec 05 03:46:32.225 INFO [stderr]   |
Dec 05 03:46:32.225 INFO [stderr] 2 | use std::mem::drop;
Dec 05 03:46:32.226 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 05 03:46:32.226 INFO [stderr] 
Dec 05 03:46:32.236 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 03:46:32.236 INFO [stderr]   --> src/main.rs:20:2
Dec 05 03:46:32.237 INFO [stderr]    |
Dec 05 03:46:32.237 INFO [stderr] 20 |     imagefmt::write("out.bmp", maze.width, maze.height, ColFmt::RGB, &pixels, ColType::Auto);
Dec 05 03:46:32.237 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 03:46:32.237 INFO [stderr]    |
Dec 05 03:46:32.238 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 05 03:46:32.238 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 03:46:32.238 INFO [stderr] 
Dec 05 03:46:32.441 INFO [stderr] warning: variable does not need to be mutable
Dec 05 03:46:32.441 INFO [stderr]   --> src/tree.rs:41:8
Dec 05 03:46:32.441 INFO [stderr]    |
Dec 05 03:46:32.442 INFO [stderr] 41 |             let mut cur = &mut *next.take().unwrap();
Dec 05 03:46:32.442 INFO [stderr]    |                 ----^^^
Dec 05 03:46:32.442 INFO [stderr]    |                 |
Dec 05 03:46:32.443 INFO [stderr]    |                 help: remove this `mut`
Dec 05 03:46:32.443 INFO [stderr]    |
Dec 05 03:46:32.443 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 03:46:32.443 INFO [stderr] 
Dec 05 03:46:32.505 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 03:46:32.505 INFO [stderr]   --> src/main.rs:20:2
Dec 05 03:46:32.505 INFO [stderr]    |
Dec 05 03:46:32.505 INFO [stderr] 20 |     imagefmt::write("out.bmp", maze.width, maze.height, ColFmt::RGB, &pixels, ColType::Auto);
Dec 05 03:46:32.506 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 03:46:32.506 INFO [stderr]    |
Dec 05 03:46:32.506 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 05 03:46:32.506 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 03:46:32.506 INFO [stderr] 
Dec 05 03:46:32.532 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.50s
Dec 05 03:46:32.535 INFO [stderr] su: No module specific data is present
Dec 05 03:46:33.045 INFO running `"docker" "inspect" "957ecbe238f5d4195345689d246904516d8b43205e7d2429709e86d824de58e9"`
Dec 05 03:46:33.337 INFO running `"docker" "rm" "-f" "957ecbe238f5d4195345689d246904516d8b43205e7d2429709e86d824de58e9"`
Dec 05 03:46:33.435 INFO [stdout] 957ecbe238f5d4195345689d246904516d8b43205e7d2429709e86d824de58e9