[INFO] updating cached repository mdibello/labyrinthe
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mdibello/labyrinthe
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mdibello/labyrinthe" "work/ex/beta-1.38-1/sources/1.37.0/gh/mdibello/labyrinthe"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mdibello/labyrinthe'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mdibello/labyrinthe" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mdibello/labyrinthe"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mdibello/labyrinthe'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7484e06542747049adff93484cfc6203c2dd4a10
[INFO] sha for GitHub repo mdibello/labyrinthe: 7484e06542747049adff93484cfc6203c2dd4a10
[INFO] validating manifest of mdibello/labyrinthe on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mdibello/labyrinthe on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mdibello/labyrinthe
[INFO] finished frobbing mdibello/labyrinthe
[INFO] frobbed toml for mdibello/labyrinthe written to work/ex/beta-1.38-1/sources/1.37.0/gh/mdibello/labyrinthe/Cargo.toml
[INFO] started frobbing mdibello/labyrinthe
[INFO] finished frobbing mdibello/labyrinthe
[INFO] frobbed toml for mdibello/labyrinthe written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mdibello/labyrinthe/Cargo.toml
[INFO] crate mdibello/labyrinthe already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mdibello/labyrinthe against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mdibello/labyrinthe:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 47866357bb2891042dcf137168a9e94916929d4d855b31fe53843a410b760c91
[INFO] running `"docker" "start" "-a" "47866357bb2891042dcf137168a9e94916929d4d855b31fe53843a410b760c91"`
[INFO] [stderr]    Compiling labyrinthe v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `binary_tree_maze`
[INFO] [stderr]   --> src/main.rs:98:1
[INFO] [stderr]    |
[INFO] [stderr] 98 | fn binary_tree_maze(w: usize, h: usize) -> Maze {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `"docker" "inspect" "47866357bb2891042dcf137168a9e94916929d4d855b31fe53843a410b760c91"`
[INFO] running `"docker" "rm" "-f" "47866357bb2891042dcf137168a9e94916929d4d855b31fe53843a410b760c91"`
[INFO] [stdout] 47866357bb2891042dcf137168a9e94916929d4d855b31fe53843a410b760c91
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mdibello/labyrinthe:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9a44e93fbe805ee8fc83109d293b01bd07980fdead00e9b2e90d50cdea5631ab
[INFO] running `"docker" "start" "-a" "9a44e93fbe805ee8fc83109d293b01bd07980fdead00e9b2e90d50cdea5631ab"`
[INFO] [stderr]    Compiling labyrinthe v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `binary_tree_maze`
[INFO] [stderr]   --> src/main.rs:98:1
[INFO] [stderr]    |
[INFO] [stderr] 98 | fn binary_tree_maze(w: usize, h: usize) -> Maze {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `"docker" "inspect" "9a44e93fbe805ee8fc83109d293b01bd07980fdead00e9b2e90d50cdea5631ab"`
[INFO] running `"docker" "rm" "-f" "9a44e93fbe805ee8fc83109d293b01bd07980fdead00e9b2e90d50cdea5631ab"`
[INFO] [stdout] 9a44e93fbe805ee8fc83109d293b01bd07980fdead00e9b2e90d50cdea5631ab
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mdibello/labyrinthe:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] bf81f035380d1a0a9226ee12a211c8374fd432d995cc4c1445111600c2f73465
[INFO] running `"docker" "start" "-a" "bf81f035380d1a0a9226ee12a211c8374fd432d995cc4c1445111600c2f73465"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/labyrinthe-118cfcb4c273bdd9
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "bf81f035380d1a0a9226ee12a211c8374fd432d995cc4c1445111600c2f73465"`
[INFO] running `"docker" "rm" "-f" "bf81f035380d1a0a9226ee12a211c8374fd432d995cc4c1445111600c2f73465"`
[INFO] [stdout] bf81f035380d1a0a9226ee12a211c8374fd432d995cc4c1445111600c2f73465