[INFO] updating cached repository terakun/spanning_tree_maze
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/terakun/spanning_tree_maze
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/terakun/spanning_tree_maze" "work/ex/beta-1.38-1/sources/1.37.0/gh/terakun/spanning_tree_maze"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/terakun/spanning_tree_maze'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/terakun/spanning_tree_maze" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/terakun/spanning_tree_maze"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/terakun/spanning_tree_maze'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7d76ea3667cf2b8d531d7634fb620d8387038961
[INFO] sha for GitHub repo terakun/spanning_tree_maze: 7d76ea3667cf2b8d531d7634fb620d8387038961
[INFO] validating manifest of terakun/spanning_tree_maze 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 terakun/spanning_tree_maze 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 terakun/spanning_tree_maze
[INFO] finished frobbing terakun/spanning_tree_maze
[INFO] frobbed toml for terakun/spanning_tree_maze written to work/ex/beta-1.38-1/sources/1.37.0/gh/terakun/spanning_tree_maze/Cargo.toml
[INFO] started frobbing terakun/spanning_tree_maze
[INFO] finished frobbing terakun/spanning_tree_maze
[INFO] frobbed toml for terakun/spanning_tree_maze written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/terakun/spanning_tree_maze/Cargo.toml
[INFO] crate terakun/spanning_tree_maze 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 terakun/spanning_tree_maze 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-3/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/terakun/spanning_tree_maze:/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] e94c0af32aab6aa541ebde0a92280556c4f631a6405648c8cf159746e3d1f192
[INFO] running `"docker" "start" "-a" "e94c0af32aab6aa541ebde0a92280556c4f631a6405648c8cf159746e3d1f192"`
[INFO] [stderr]    Compiling spanning_tree_maze v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "e94c0af32aab6aa541ebde0a92280556c4f631a6405648c8cf159746e3d1f192"`
[INFO] running `"docker" "rm" "-f" "e94c0af32aab6aa541ebde0a92280556c4f631a6405648c8cf159746e3d1f192"`
[INFO] [stdout] e94c0af32aab6aa541ebde0a92280556c4f631a6405648c8cf159746e3d1f192
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/terakun/spanning_tree_maze:/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] c37195661ae829e3829f9147cd0cb76b10229b881b5d751f4a1aa6956a782b0f
[INFO] running `"docker" "start" "-a" "c37195661ae829e3829f9147cd0cb76b10229b881b5d751f4a1aa6956a782b0f"`
[INFO] [stderr]    Compiling spanning_tree_maze v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `"docker" "inspect" "c37195661ae829e3829f9147cd0cb76b10229b881b5d751f4a1aa6956a782b0f"`
[INFO] running `"docker" "rm" "-f" "c37195661ae829e3829f9147cd0cb76b10229b881b5d751f4a1aa6956a782b0f"`
[INFO] [stdout] c37195661ae829e3829f9147cd0cb76b10229b881b5d751f4a1aa6956a782b0f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/terakun/spanning_tree_maze:/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] 492f989f7622a29309bddc5db2b04cfbfd423619ed99f08c5bc362ff6745a20b
[INFO] running `"docker" "start" "-a" "492f989f7622a29309bddc5db2b04cfbfd423619ed99f08c5bc362ff6745a20b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/spanning_tree_maze-92b38241ca14393e
[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" "492f989f7622a29309bddc5db2b04cfbfd423619ed99f08c5bc362ff6745a20b"`
[INFO] running `"docker" "rm" "-f" "492f989f7622a29309bddc5db2b04cfbfd423619ed99f08c5bc362ff6745a20b"`
[INFO] [stdout] 492f989f7622a29309bddc5db2b04cfbfd423619ed99f08c5bc362ff6745a20b