[INFO] updating cached repository VaysseB/mazing
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/VaysseB/mazing
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/VaysseB/mazing" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/VaysseB/mazing"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/VaysseB/mazing'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/VaysseB/mazing" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/VaysseB/mazing"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/VaysseB/mazing'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 56608ee6bb6fd112de86b7885445f5d0c1e07b66
[INFO] sha for GitHub repo VaysseB/mazing: 56608ee6bb6fd112de86b7885445f5d0c1e07b66
[INFO] validating manifest of VaysseB/mazing on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of VaysseB/mazing on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing VaysseB/mazing
[INFO] finished frobbing VaysseB/mazing
[INFO] frobbed toml for VaysseB/mazing written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/VaysseB/mazing/Cargo.toml
[INFO] started frobbing VaysseB/mazing
[INFO] finished frobbing VaysseB/mazing
[INFO] frobbed toml for VaysseB/mazing written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/VaysseB/mazing/Cargo.toml
[INFO] crate VaysseB/mazing already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking VaysseB/mazing against try#58b21121d0b447ceb3f1a655155d802191acf044 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-4/try#58b21121d0b447ceb3f1a655155d802191acf044:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/VaysseB/mazing:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f5aaaff388b0fdab70e4094479f06c7cc4cd470299a373513f4fa54857c96e65
[INFO] running `"docker" "start" "-a" "f5aaaff388b0fdab70e4094479f06c7cc4cd470299a373513f4fa54857c96e65"`
[INFO] [stderr]     Checking serde v1.0.23
[INFO] [stderr]     Checking shared_library v0.1.7
[INFO] [stderr]    Compiling x11-dl v2.17.0
[INFO] [stderr]    Compiling serde_derive v1.0.23
[INFO] [stderr]     Checking image v0.17.0
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking piston2d-opengl_graphics v0.49.0
[INFO] [stderr]     Checking winit v0.8.3
[INFO] [stderr]     Checking glutin v0.10.1
[INFO] [stderr]     Checking pistoncore-input v0.20.0
[INFO] [stderr]     Checking pistoncore-window v0.30.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.35.0
[INFO] [stderr]     Checking pistoncore-glutin_window v0.42.1
[INFO] [stderr]     Checking piston v0.35.0
[INFO] [stderr]     Checking mazing v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Within` is imported redundantly
[INFO] [stderr]    --> src/maze_render.rs:200:13
[INFO] [stderr]     |
[INFO] [stderr] 9   | use super::grid::{Pos, Within};
[INFO] [stderr]     |                        ------ the item `Within` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 200 |         use grid::Within;
[INFO] [stderr]     |             ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Rng` is imported redundantly
[INFO] [stderr]    --> src/algo/carving.rs:160:17
[INFO] [stderr]     |
[INFO] [stderr] 4   | use self::rand::Rng;
[INFO] [stderr]     |     --------------- the item `Rng` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 160 |             use self::rand::Rng;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Within` is imported redundantly
[INFO] [stderr]    --> src/maze_render.rs:200:13
[INFO] [stderr]     |
[INFO] [stderr] 9   | use super::grid::{Pos, Within};
[INFO] [stderr]     |                        ------ the item `Within` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 200 |         use grid::Within;
[INFO] [stderr]     |             ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Rng` is imported redundantly
[INFO] [stderr]    --> src/algo/carving.rs:160:17
[INFO] [stderr]     |
[INFO] [stderr] 4   | use self::rand::Rng;
[INFO] [stderr]     |     --------------- the item `Rng` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 160 |             use self::rand::Rng;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.94s
[INFO] running `"docker" "inspect" "f5aaaff388b0fdab70e4094479f06c7cc4cd470299a373513f4fa54857c96e65"`
[INFO] running `"docker" "rm" "-f" "f5aaaff388b0fdab70e4094479f06c7cc4cd470299a373513f4fa54857c96e65"`
[INFO] [stdout] f5aaaff388b0fdab70e4094479f06c7cc4cd470299a373513f4fa54857c96e65