[INFO] updating cached repository https://github.com/procedural-rust/Maze_generator
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5740be4aac6004a6c4a2f87a0e98c603aad1f90e
[INFO] checking procedural-rust/Maze_generator against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprocedural-rust%2FMaze_generator" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/procedural-rust/Maze_generator on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/procedural-rust/Maze_generator
[INFO] finished tweaking git repo https://github.com/procedural-rust/Maze_generator
[INFO] tweaked toml for git repo https://github.com/procedural-rust/Maze_generator written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/procedural-rust/Maze_generator already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c92d1ea2d4c4454641c67ab1af01a61b1f3e382072ceca0c2df677e25cd2ac1e
[INFO] running `"docker" "start" "-a" "c92d1ea2d4c4454641c67ab1af01a61b1f3e382072ceca0c2df677e25cd2ac1e"`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling rayon-core v1.6.1
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[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking color_quant v1.0.1
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[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking bitflags v0.9.1
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]     Checking clap v2.27.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking crossbeam-queue v0.2.0
[INFO] [stderr]     Checking png v0.15.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking rayon v1.2.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.16
[INFO] [stderr]     Checking tiff v0.3.1
[INFO] [stderr]     Checking image v0.22.3
[INFO] [stderr]     Checking maze_generation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/maze.rs:30:32
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/maze.rs:30:32
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/cave.rs:32:32
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/cave.rs:32:32
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `turn_clockwise`
[INFO] [stderr]   --> src/maze.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn turn_clockwise(self) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `turn_counterclockwise`
[INFO] [stderr]   --> src/maze.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |     pub fn turn_counterclockwise(self) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `init_rect_with_bitmask`
[INFO] [stderr]    --> src/maze.rs:183:5
[INFO] [stderr]     |
[INFO] [stderr] 183 |     pub fn init_rect_with_bitmask(my_rows: usize, my_columns: usize, wrap: usize, bitmask: Vec<Vec<bool>>, method: GenerationType) -> Result<Maze,MazeError> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_starting_points`
[INFO] [stderr]    --> src/maze.rs:213:4
[INFO] [stderr]     |
[INFO] [stderr] 213 | fn get_starting_points(my_rows: usize, my_columns: usize, wrap: usize, bitmask: Vec<Vec<bool>>) -> Vec<Point>{
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `turn_clockwise`
[INFO] [stderr]   --> src/maze.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn turn_clockwise(self) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `turn_counterclockwise`
[INFO] [stderr]   --> src/maze.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |     pub fn turn_counterclockwise(self) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `init_rect_with_bitmask`
[INFO] [stderr]    --> src/maze.rs:183:5
[INFO] [stderr]     |
[INFO] [stderr] 183 |     pub fn init_rect_with_bitmask(my_rows: usize, my_columns: usize, wrap: usize, bitmask: Vec<Vec<bool>>, method: GenerationType) -> Result<Maze,MazeError> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_starting_points`
[INFO] [stderr]    --> src/maze.rs:213:4
[INFO] [stderr]     |
[INFO] [stderr] 213 | fn get_starting_points(my_rows: usize, my_columns: usize, wrap: usize, bitmask: Vec<Vec<bool>>) -> Vec<Point>{
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.79s
[INFO] running `"docker" "inspect" "c92d1ea2d4c4454641c67ab1af01a61b1f3e382072ceca0c2df677e25cd2ac1e"`
[INFO] running `"docker" "rm" "-f" "c92d1ea2d4c4454641c67ab1af01a61b1f3e382072ceca0c2df677e25cd2ac1e"`
[INFO] [stdout] c92d1ea2d4c4454641c67ab1af01a61b1f3e382072ceca0c2df677e25cd2ac1e