[INFO] updating cached repository swizzard/rust-mazes
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/swizzard/rust-mazes
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/swizzard/rust-mazes" "work/ex/beta-1.37-6/sources/1.36.0/gh/swizzard/rust-mazes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/swizzard/rust-mazes'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/swizzard/rust-mazes" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/swizzard/rust-mazes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/swizzard/rust-mazes'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 46d2f9f69c6ba91b75dab043e72d95d8953a9c8c
[INFO] sha for GitHub repo swizzard/rust-mazes: 46d2f9f69c6ba91b75dab043e72d95d8953a9c8c
[INFO] validating manifest of swizzard/rust-mazes 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 swizzard/rust-mazes 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 swizzard/rust-mazes
[INFO] finished frobbing swizzard/rust-mazes
[INFO] frobbed toml for swizzard/rust-mazes written to work/ex/beta-1.37-6/sources/1.36.0/gh/swizzard/rust-mazes/Cargo.toml
[INFO] started frobbing swizzard/rust-mazes
[INFO] finished frobbing swizzard/rust-mazes
[INFO] frobbed toml for swizzard/rust-mazes written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/swizzard/rust-mazes/Cargo.toml
[INFO] crate swizzard/rust-mazes 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 swizzard/rust-mazes 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-3/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/swizzard/rust-mazes:/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] 74dde3bf0e004fb2aa3bd2a7f806c47f5e198fec087332f973a78fd691627083
[INFO] running `"docker" "start" "-a" "74dde3bf0e004fb2aa3bd2a7f806c47f5e198fec087332f973a78fd691627083"`
[INFO] [stderr]    Compiling rand v0.3.16
[INFO] [stderr]    Compiling mazes v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.12s
[INFO] running `"docker" "inspect" "74dde3bf0e004fb2aa3bd2a7f806c47f5e198fec087332f973a78fd691627083"`
[INFO] running `"docker" "rm" "-f" "74dde3bf0e004fb2aa3bd2a7f806c47f5e198fec087332f973a78fd691627083"`
[INFO] [stdout] 74dde3bf0e004fb2aa3bd2a7f806c47f5e198fec087332f973a78fd691627083
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/swizzard/rust-mazes:/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] c7c958e6e7ac901e6c9cb96f96b39aa9bfa0ac25de0a9d9d9ea77a131caed445
[INFO] running `"docker" "start" "-a" "c7c958e6e7ac901e6c9cb96f96b39aa9bfa0ac25de0a9d9d9ea77a131caed445"`
[INFO] [stderr]    Compiling mazes v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/maze.rs:302:21
[INFO] [stderr]     |
[INFO] [stderr] 302 |             assert!(c.loc.column >= 0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_comparisons)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/maze.rs:304:21
[INFO] [stderr]     |
[INFO] [stderr] 304 |             assert!(c.loc.column >= 0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.08s
[INFO] running `"docker" "inspect" "c7c958e6e7ac901e6c9cb96f96b39aa9bfa0ac25de0a9d9d9ea77a131caed445"`
[INFO] running `"docker" "rm" "-f" "c7c958e6e7ac901e6c9cb96f96b39aa9bfa0ac25de0a9d9d9ea77a131caed445"`
[INFO] [stdout] c7c958e6e7ac901e6c9cb96f96b39aa9bfa0ac25de0a9d9d9ea77a131caed445
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/swizzard/rust-mazes:/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] c77e7f311eb90f895965ca50ab7d6af6ecba428160fca6c76b0cc18065bb7eaa
[INFO] running `"docker" "start" "-a" "c77e7f311eb90f895965ca50ab7d6af6ecba428160fca6c76b0cc18065bb7eaa"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mazes-94955350da9537ff
[INFO] [stdout] running 7 tests
[INFO] [stdout] test cell::test::calc_dir ... ok
[INFO] [stdout] test maze::test::add_neighbor ... ok
[INFO] [stdout] test maze::test::each_cell_iter ... ok
[INFO] [stdout] test maze::test::each_col_iter ... ok
[INFO] [stdout] test maze::test::each_row_iter ... ok
[INFO] [stdout] test maze::test::rand_cell_iter ... ok
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mazes-64b5d46f918f3c81
[INFO] [stdout] test cell::test::calc_dir_bad ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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] [stderr]    Doc-tests mazes
[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" "c77e7f311eb90f895965ca50ab7d6af6ecba428160fca6c76b0cc18065bb7eaa"`
[INFO] running `"docker" "rm" "-f" "c77e7f311eb90f895965ca50ab7d6af6ecba428160fca6c76b0cc18065bb7eaa"`
[INFO] [stdout] c77e7f311eb90f895965ca50ab7d6af6ecba428160fca6c76b0cc18065bb7eaa