Nov 30 12:23:40.961 INFO checking 02alexander/maze-solver against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 30 12:23:40.961 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-1/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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"`
Nov 30 12:23:41.150 INFO [stdout] b4753f3c024965810adca83a5047c565e30e4fe010597d6c5f8cbd89c6c4384b
Nov 30 12:23:41.152 INFO running `"docker" "start" "-a" "b4753f3c024965810adca83a5047c565e30e4fe010597d6c5f8cbd89c6c4384b"`
Nov 30 12:23:41.620 INFO [stderr] usermod: no changes
Nov 30 12:23:41.671 INFO [stderr]     Checking imagefmt v4.0.0
Nov 30 12:23:43.303 INFO [stderr]     Checking maze-solver v0.1.0 (/source)
Nov 30 12:23:43.877 INFO [stderr] warning: unused imports: `read`, `write`
Nov 30 12:23:43.877 INFO [stderr]  --> src/main.rs:3:16
Nov 30 12:23:43.877 INFO [stderr]   |
Nov 30 12:23:43.877 INFO [stderr] 3 | use imagefmt::{read, write, ColFmt, ColType};
Nov 30 12:23:43.877 INFO [stderr]   |                ^^^^  ^^^^^
Nov 30 12:23:43.877 INFO [stderr]   |
Nov 30 12:23:43.877 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 30 12:23:43.877 INFO [stderr] 
Nov 30 12:23:43.877 INFO [stderr] warning: unused import: `std::mem::drop`
Nov 30 12:23:43.877 INFO [stderr]  --> src/tree.rs:2:5
Nov 30 12:23:43.877 INFO [stderr]   |
Nov 30 12:23:43.877 INFO [stderr] 2 | use std::mem::drop;
Nov 30 12:23:43.877 INFO [stderr]   |     ^^^^^^^^^^^^^^
Nov 30 12:23:43.877 INFO [stderr] 
Nov 30 12:23:43.877 INFO [stderr] warning: unused import: `Node`
Nov 30 12:23:43.877 INFO [stderr]  --> src/path_to_end.rs:3:35
Nov 30 12:23:43.877 INFO [stderr]   |
Nov 30 12:23:43.878 INFO [stderr] 3 | use super::tree::{QuaternaryTree, Node, Link};
Nov 30 12:23:43.878 INFO [stderr]   |                                   ^^^^
Nov 30 12:23:43.878 INFO [stderr] 
Nov 30 12:23:43.987 INFO [stderr] warning: unused imports: `read`, `write`
Nov 30 12:23:43.987 INFO [stderr]  --> src/main.rs:3:16
Nov 30 12:23:43.987 INFO [stderr]   |
Nov 30 12:23:43.988 INFO [stderr] 3 | use imagefmt::{read, write, ColFmt, ColType};
Nov 30 12:23:43.988 INFO [stderr]   |                ^^^^  ^^^^^
Nov 30 12:23:43.988 INFO [stderr]   |
Nov 30 12:23:43.989 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 30 12:23:43.989 INFO [stderr] 
Nov 30 12:23:43.989 INFO [stderr] warning: unused import: `std::mem::drop`
Nov 30 12:23:43.989 INFO [stderr]  --> src/tree.rs:2:5
Nov 30 12:23:43.990 INFO [stderr]   |
Nov 30 12:23:43.990 INFO [stderr] 2 | use std::mem::drop;
Nov 30 12:23:43.990 INFO [stderr]   |     ^^^^^^^^^^^^^^
Nov 30 12:23:43.990 INFO [stderr] 
Nov 30 12:23:44.005 INFO [stderr] warning: variable does not need to be mutable
Nov 30 12:23:44.005 INFO [stderr]   --> src/tree.rs:41:8
Nov 30 12:23:44.005 INFO [stderr]    |
Nov 30 12:23:44.006 INFO [stderr] 41 |             let mut cur = &mut *next.take().unwrap();
Nov 30 12:23:44.006 INFO [stderr]    |                 ----^^^
Nov 30 12:23:44.006 INFO [stderr]    |                 |
Nov 30 12:23:44.006 INFO [stderr]    |                 help: remove this `mut`
Nov 30 12:23:44.006 INFO [stderr]    |
Nov 30 12:23:44.006 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 30 12:23:44.006 INFO [stderr] 
Nov 30 12:23:44.035 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 12:23:44.035 INFO [stderr]   --> src/main.rs:20:2
Nov 30 12:23:44.035 INFO [stderr]    |
Nov 30 12:23:44.035 INFO [stderr] 20 |     imagefmt::write("out.bmp", maze.width, maze.height, ColFmt::RGB, &pixels, ColType::Auto);
Nov 30 12:23:44.035 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 12:23:44.035 INFO [stderr]    |
Nov 30 12:23:44.036 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 30 12:23:44.036 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 12:23:44.036 INFO [stderr] 
Nov 30 12:23:44.227 INFO [stderr] warning: variable does not need to be mutable
Nov 30 12:23:44.228 INFO [stderr]   --> src/tree.rs:41:8
Nov 30 12:23:44.228 INFO [stderr]    |
Nov 30 12:23:44.228 INFO [stderr] 41 |             let mut cur = &mut *next.take().unwrap();
Nov 30 12:23:44.229 INFO [stderr]    |                 ----^^^
Nov 30 12:23:44.229 INFO [stderr]    |                 |
Nov 30 12:23:44.229 INFO [stderr]    |                 help: remove this `mut`
Nov 30 12:23:44.230 INFO [stderr]    |
Nov 30 12:23:44.230 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 30 12:23:44.230 INFO [stderr] 
Nov 30 12:23:44.297 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 12:23:44.297 INFO [stderr]   --> src/main.rs:20:2
Nov 30 12:23:44.298 INFO [stderr]    |
Nov 30 12:23:44.298 INFO [stderr] 20 |     imagefmt::write("out.bmp", maze.width, maze.height, ColFmt::RGB, &pixels, ColType::Auto);
Nov 30 12:23:44.298 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 12:23:44.298 INFO [stderr]    |
Nov 30 12:23:44.298 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 30 12:23:44.298 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 12:23:44.298 INFO [stderr] 
Nov 30 12:23:44.313 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.67s
Nov 30 12:23:44.316 INFO [stderr] su: No module specific data is present
Nov 30 12:23:44.835 INFO running `"docker" "inspect" "b4753f3c024965810adca83a5047c565e30e4fe010597d6c5f8cbd89c6c4384b"`
Nov 30 12:23:45.156 INFO running `"docker" "rm" "-f" "b4753f3c024965810adca83a5047c565e30e4fe010597d6c5f8cbd89c6c4384b"`
Nov 30 12:23:45.505 INFO [stdout] b4753f3c024965810adca83a5047c565e30e4fe010597d6c5f8cbd89c6c4384b