[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-1.37-6/sources/1.36.0/gh/mdibello/labyrinthe"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/mdibello/labyrinthe'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mdibello/labyrinthe" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mdibello/labyrinthe"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mdibello/labyrinthe on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mdibello/labyrinthe against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 610ac7c0fe12ac0ba2c56a745234568e2f7ad8e9ee10300aec7597e78bf95eca
[INFO] running `"docker" "start" "-a" "610ac7c0fe12ac0ba2c56a745234568e2f7ad8e9ee10300aec7597e78bf95eca"`
[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 0.94s
[INFO] running `"docker" "inspect" "610ac7c0fe12ac0ba2c56a745234568e2f7ad8e9ee10300aec7597e78bf95eca"`
[INFO] running `"docker" "rm" "-f" "610ac7c0fe12ac0ba2c56a745234568e2f7ad8e9ee10300aec7597e78bf95eca"`
[INFO] [stdout] 610ac7c0fe12ac0ba2c56a745234568e2f7ad8e9ee10300aec7597e78bf95eca
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3ad50ae359ffc32b0d38508f54f63f3716b0f7a3d633247338a3d2287deb6a66
[INFO] running `"docker" "start" "-a" "3ad50ae359ffc32b0d38508f54f63f3716b0f7a3d633247338a3d2287deb6a66"`
[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 0.70s
[INFO] running `"docker" "inspect" "3ad50ae359ffc32b0d38508f54f63f3716b0f7a3d633247338a3d2287deb6a66"`
[INFO] running `"docker" "rm" "-f" "3ad50ae359ffc32b0d38508f54f63f3716b0f7a3d633247338a3d2287deb6a66"`
[INFO] [stdout] 3ad50ae359ffc32b0d38508f54f63f3716b0f7a3d633247338a3d2287deb6a66
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] d7b104a3e62d472b1b1abab822c7904ff1ae1bfe111de21bc13c2a59384e1c8e
[INFO] running `"docker" "start" "-a" "d7b104a3e62d472b1b1abab822c7904ff1ae1bfe111de21bc13c2a59384e1c8e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/labyrinthe-1e8e698caf3a6b84
[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" "d7b104a3e62d472b1b1abab822c7904ff1ae1bfe111de21bc13c2a59384e1c8e"`
[INFO] running `"docker" "rm" "-f" "d7b104a3e62d472b1b1abab822c7904ff1ae1bfe111de21bc13c2a59384e1c8e"`
[INFO] [stdout] d7b104a3e62d472b1b1abab822c7904ff1ae1bfe111de21bc13c2a59384e1c8e