[INFO] updating cached repository tlrobrn/r-maze
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tlrobrn/r-maze
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tlrobrn/r-maze" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/tlrobrn/r-maze"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/tlrobrn/r-maze'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tlrobrn/r-maze" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/tlrobrn/r-maze"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/tlrobrn/r-maze'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cff6682df762a4a2143edf0db19359674579793a
[INFO] sha for GitHub repo tlrobrn/r-maze: cff6682df762a4a2143edf0db19359674579793a
[INFO] validating manifest of tlrobrn/r-maze 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 tlrobrn/r-maze 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 tlrobrn/r-maze
[INFO] finished frobbing tlrobrn/r-maze
[INFO] frobbed toml for tlrobrn/r-maze written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/tlrobrn/r-maze/Cargo.toml
[INFO] started frobbing tlrobrn/r-maze
[INFO] finished frobbing tlrobrn/r-maze
[INFO] frobbed toml for tlrobrn/r-maze written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/tlrobrn/r-maze/Cargo.toml
[INFO] crate tlrobrn/r-maze 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] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/tlrobrn/r-maze/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/tlrobrn/r-dsets`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/tlrobrn/r-dsets`
[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 tlrobrn/r-maze against try#58b21121d0b447ceb3f1a655155d802191acf044 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-2/try#58b21121d0b447ceb3f1a655155d802191acf044:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/tlrobrn/r-maze:/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] 9b3e06e73f89ab8311865c8e2165a3e7475725606fc3c702da8da9f7bb2b67e7
[INFO] running `"docker" "start" "-a" "9b3e06e73f89ab8311865c8e2165a3e7475725606fc3c702da8da9f7bb2b67e7"`
[INFO] [stderr] warning: dependency (rand) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: unused manifest key: dependencies.rand.rand
[INFO] [stderr]     Checking disjoint_sets v0.0.2 (https://github.com/tlrobrn/r-dsets#fd0a8512)
[INFO] [stderr]     Checking r-maze v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'maze::rand::Rng::shuffle': use SliceRandom::shuffle instead
[INFO] [stderr]   --> src/maze.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 |         rng.shuffle(&mut east);
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'maze::rand::Rng::shuffle': use SliceRandom::shuffle instead
[INFO] [stderr]   --> src/maze.rs:60:13
[INFO] [stderr]    |
[INFO] [stderr] 60 |         rng.shuffle(&mut south);
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'maze::rand::Rng::shuffle': use SliceRandom::shuffle instead
[INFO] [stderr]   --> src/maze.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 |         rng.shuffle(&mut east);
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'maze::rand::Rng::shuffle': use SliceRandom::shuffle instead
[INFO] [stderr]   --> src/maze.rs:60:13
[INFO] [stderr]    |
[INFO] [stderr] 60 |         rng.shuffle(&mut south);
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/maze.rs:65:28
[INFO] [stderr]    |
[INFO] [stderr] 65 |     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:65:28
[INFO] [stderr]    |
[INFO] [stderr] 65 |     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]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `"docker" "inspect" "9b3e06e73f89ab8311865c8e2165a3e7475725606fc3c702da8da9f7bb2b67e7"`
[INFO] running `"docker" "rm" "-f" "9b3e06e73f89ab8311865c8e2165a3e7475725606fc3c702da8da9f7bb2b67e7"`
[INFO] [stdout] 9b3e06e73f89ab8311865c8e2165a3e7475725606fc3c702da8da9f7bb2b67e7