[INFO] updating cached repository aleyan/langtonsant
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/aleyan/langtonsant
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/aleyan/langtonsant" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/aleyan/langtonsant"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/aleyan/langtonsant'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/aleyan/langtonsant" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/aleyan/langtonsant"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/aleyan/langtonsant'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f805a70044475492ef5af3a3b9dfefc0f804373f
[INFO] sha for GitHub repo aleyan/langtonsant: f805a70044475492ef5af3a3b9dfefc0f804373f
[INFO] validating manifest of aleyan/langtonsant 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 aleyan/langtonsant 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 aleyan/langtonsant
[INFO] finished frobbing aleyan/langtonsant
[INFO] frobbed toml for aleyan/langtonsant written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/aleyan/langtonsant/Cargo.toml
[INFO] started frobbing aleyan/langtonsant
[INFO] finished frobbing aleyan/langtonsant
[INFO] frobbed toml for aleyan/langtonsant written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/aleyan/langtonsant/Cargo.toml
[INFO] crate aleyan/langtonsant 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 aleyan/langtonsant against master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-2/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/aleyan/langtonsant:/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" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6debe393956837ea2b55bda1e19a69defb2aa03482e12a4fe6066f153bf66041
[INFO] running `"docker" "start" "-a" "6debe393956837ea2b55bda1e19a69defb2aa03482e12a4fe6066f153bf66041"`
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling palette v0.4.1
[INFO] [stderr]     Checking nalgebra v0.16.8
[INFO] [stderr]    Compiling palette_derive v0.4.1
[INFO] [stderr] warning[E0502]: cannot borrow `*self` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.16.8/src/base/cg.rs:291:44
[INFO] [stderr]     |
[INFO] [stderr] 291 |                 self[(j, i)] += shift[j] * self[(D::dim() - 1, i)];
[INFO] [stderr]     |                 ---------------------------^^^^-------------------
[INFO] [stderr]     |                 |                          |
[INFO] [stderr]     |                 |                          immutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]     Checking langtonsant v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/canvas.rs:174:9
[INFO] [stderr]     |
[INFO] [stderr] 174 | /         write!(
[INFO] [stderr] 175 | |             out,
[INFO] [stderr] 176 | |             "{}{}{}",
[INFO] [stderr] 177 | |             cursor::Goto(1, (self.rows + 1) as u16),
[INFO] [stderr] 178 | |             style::Reset,
[INFO] [stderr] 179 | |             cursor::Show
[INFO] [stderr] 180 | |         );
[INFO] [stderr]     | |__________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/canvas.rs:174:9
[INFO] [stderr]     |
[INFO] [stderr] 174 | /         write!(
[INFO] [stderr] 175 | |             out,
[INFO] [stderr] 176 | |             "{}{}{}",
[INFO] [stderr] 177 | |             cursor::Goto(1, (self.rows + 1) as u16),
[INFO] [stderr] 178 | |             style::Reset,
[INFO] [stderr] 179 | |             cursor::Show
[INFO] [stderr] 180 | |         );
[INFO] [stderr]     | |__________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.76s
[INFO] running `"docker" "inspect" "6debe393956837ea2b55bda1e19a69defb2aa03482e12a4fe6066f153bf66041"`
[INFO] running `"docker" "rm" "-f" "6debe393956837ea2b55bda1e19a69defb2aa03482e12a4fe6066f153bf66041"`
[INFO] [stdout] 6debe393956837ea2b55bda1e19a69defb2aa03482e12a4fe6066f153bf66041