[INFO] cloning repository tlrobrn/one_d
[INFO] running `"git" "clone" "--bare" "git://github.com/tlrobrn/one_d.git" "work/cache/sources/gh/tlrobrn/one_d"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/tlrobrn/one_d'...
[INFO] running `"git" "clone" "work/cache/sources/gh/tlrobrn/one_d" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/tlrobrn/one_d"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/tlrobrn/one_d'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tlrobrn/one_d" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/tlrobrn/one_d"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/tlrobrn/one_d'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 87b8d21bd676042fa69258019a4ab2018f54a6f4
[INFO] sha for GitHub repo tlrobrn/one_d: 87b8d21bd676042fa69258019a4ab2018f54a6f4
[INFO] validating manifest of tlrobrn/one_d on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tlrobrn/one_d on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tlrobrn/one_d
[INFO] finished frobbing tlrobrn/one_d
[INFO] frobbed toml for tlrobrn/one_d written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/tlrobrn/one_d/Cargo.toml
[INFO] started frobbing tlrobrn/one_d
[INFO] finished frobbing tlrobrn/one_d
[INFO] frobbed toml for tlrobrn/one_d written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/tlrobrn/one_d/Cargo.toml
[INFO] crate tlrobrn/one_d already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded glutin v0.7.2
[INFO] [stderr]   Downloaded winit v0.5.8
[INFO] [stderr]   Downloaded piston2d-opengl_graphics v0.37.0
[INFO] [stderr]   Downloaded deflate v0.7.2
[INFO] [stderr]   Downloaded serde v0.8.22
[INFO] [stderr]   Downloaded gleam v0.2.31
[INFO] [stderr]   Downloaded siphasher v0.2.0
[INFO] [stderr]   Downloaded image v0.12.1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking tlrobrn/one_d against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-2/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/tlrobrn/one_d:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cd75e06c38d16f0609cc24ca41d0d7925f3b22e88c0fdcbb7f090394057dc536
[INFO] running `"docker" "start" "-a" "cd75e06c38d16f0609cc24ca41d0d7925f3b22e88c0fdcbb7f090394057dc536"`
[INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other binary targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a binary target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/src/main.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobins = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr] warning: path `/opt/crater/workdir/src/main.rs` was erroneously implicitly accepted for binary `oned`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]    Compiling siphasher v0.2.0
[INFO] [stderr]    Compiling serde v0.8.22
[INFO] [stderr]     Checking piston-shaders_graphics2d v0.1.0
[INFO] [stderr]     Checking deflate v0.7.2
[INFO] [stderr]     Checking num-bigint v0.1.35
[INFO] [stderr]     Checking x11-dl v2.12.0
[INFO] [stderr]    Compiling glutin v0.7.2
[INFO] [stderr]     Checking pistoncore-event_loop v0.27.0
[INFO] [stderr]     Checking docopt v0.7.0
[INFO] [stderr]     Checking piston v0.27.0
[INFO] [stderr]     Checking png v0.6.2
[INFO] [stderr]    Compiling phf_shared v0.7.21
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]    Compiling phf v0.7.21
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]     Checking num-rational v0.1.35
[INFO] [stderr]    Compiling target_build_utils v0.1.2
[INFO] [stderr]     Checking image v0.12.1
[INFO] [stderr]    Compiling serde_json v0.8.6
[INFO] [stderr]     Checking piston2d-opengl_graphics v0.37.0
[INFO] [stderr]    Compiling libloading v0.3.1
[INFO] [stderr]     Checking dlib v0.3.1
[INFO] [stderr]     Checking wayland-sys v0.7.6
[INFO] [stderr]     Checking wayland-client v0.7.6
[INFO] [stderr]     Checking wayland-window v0.4.3
[INFO] [stderr]     Checking wayland-kbd v0.6.2
[INFO] [stderr]     Checking winit v0.5.8
[INFO] [stderr]     Checking pistoncore-glutin_window v0.33.0
[INFO] [stderr]     Checking one_d v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/maze.rs:191:28
[INFO] [stderr]     |
[INFO] [stderr] 191 |     fn try_wall(&mut self, mut dsets: &mut DisjointSets, index: usize, is_east: bool) {
[INFO] [stderr]     |                            ----^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/maze.rs:191:28
[INFO] [stderr]     |
[INFO] [stderr] 191 |     fn try_wall(&mut self, mut dsets: &mut DisjointSets, index: usize, is_east: bool) {
[INFO] [stderr]     |                            ----^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Key` is imported redundantly
[INFO] [stderr]    --> src/main.rs:132:13
[INFO] [stderr]     |
[INFO] [stderr] 13  | use piston::input::*;
[INFO] [stderr]     |     ---------------- the item `Key` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 132 |         use piston::input::keyboard::Key;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Key` is imported redundantly
[INFO] [stderr]    --> src/main.rs:132:13
[INFO] [stderr]     |
[INFO] [stderr] 13  | use piston::input::*;
[INFO] [stderr]     |     ---------------- the item `Key` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 132 |         use piston::input::keyboard::Key;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 48.75s
[INFO] running `"docker" "inspect" "cd75e06c38d16f0609cc24ca41d0d7925f3b22e88c0fdcbb7f090394057dc536"`
[INFO] running `"docker" "rm" "-f" "cd75e06c38d16f0609cc24ca41d0d7925f3b22e88c0fdcbb7f090394057dc536"`
[INFO] [stdout] cd75e06c38d16f0609cc24ca41d0d7925f3b22e88c0fdcbb7f090394057dc536