[INFO] updating cached repository binocvlar/Rustlang-Towers-of-Hanoi
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/binocvlar/Rustlang-Towers-of-Hanoi
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/binocvlar/Rustlang-Towers-of-Hanoi" "work/ex/beta-1.38-1/sources/1.37.0/gh/binocvlar/Rustlang-Towers-of-Hanoi"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/binocvlar/Rustlang-Towers-of-Hanoi'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/binocvlar/Rustlang-Towers-of-Hanoi" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/binocvlar/Rustlang-Towers-of-Hanoi"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/binocvlar/Rustlang-Towers-of-Hanoi'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5ed5d69b360dbd9c32d7e2c0b2d8df075d32f06d
[INFO] sha for GitHub repo binocvlar/Rustlang-Towers-of-Hanoi: 5ed5d69b360dbd9c32d7e2c0b2d8df075d32f06d
[INFO] validating manifest of binocvlar/Rustlang-Towers-of-Hanoi 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 binocvlar/Rustlang-Towers-of-Hanoi 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 binocvlar/Rustlang-Towers-of-Hanoi
[INFO] finished frobbing binocvlar/Rustlang-Towers-of-Hanoi
[INFO] frobbed toml for binocvlar/Rustlang-Towers-of-Hanoi written to work/ex/beta-1.38-1/sources/1.37.0/gh/binocvlar/Rustlang-Towers-of-Hanoi/Cargo.toml
[INFO] started frobbing binocvlar/Rustlang-Towers-of-Hanoi
[INFO] finished frobbing binocvlar/Rustlang-Towers-of-Hanoi
[INFO] frobbed toml for binocvlar/Rustlang-Towers-of-Hanoi written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/binocvlar/Rustlang-Towers-of-Hanoi/Cargo.toml
[INFO] crate binocvlar/Rustlang-Towers-of-Hanoi 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 binocvlar/Rustlang-Towers-of-Hanoi 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-4/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/binocvlar/Rustlang-Towers-of-Hanoi:/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] 773560ad4fae0b1c1df747400025097bba19cfd48200291f3dd3db9abcca0ce6
[INFO] running `"docker" "start" "-a" "773560ad4fae0b1c1df747400025097bba19cfd48200291f3dd3db9abcca0ce6"`
[INFO] [stderr]    Compiling towers_of_hanoi v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `game_size`
[INFO] [stderr]   --> src/lib.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     game_size: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.72s
[INFO] running `"docker" "inspect" "773560ad4fae0b1c1df747400025097bba19cfd48200291f3dd3db9abcca0ce6"`
[INFO] running `"docker" "rm" "-f" "773560ad4fae0b1c1df747400025097bba19cfd48200291f3dd3db9abcca0ce6"`
[INFO] [stdout] 773560ad4fae0b1c1df747400025097bba19cfd48200291f3dd3db9abcca0ce6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/binocvlar/Rustlang-Towers-of-Hanoi:/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] 850ea4031fea29191543eac2e44bea407bc3a1e5f4ce58cb2192ff3ae05eae8d
[INFO] running `"docker" "start" "-a" "850ea4031fea29191543eac2e44bea407bc3a1e5f4ce58cb2192ff3ae05eae8d"`
[INFO] [stderr]    Compiling towers_of_hanoi v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `game_size`
[INFO] [stderr]   --> src/lib.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     game_size: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "850ea4031fea29191543eac2e44bea407bc3a1e5f4ce58cb2192ff3ae05eae8d"`
[INFO] running `"docker" "rm" "-f" "850ea4031fea29191543eac2e44bea407bc3a1e5f4ce58cb2192ff3ae05eae8d"`
[INFO] [stdout] 850ea4031fea29191543eac2e44bea407bc3a1e5f4ce58cb2192ff3ae05eae8d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/binocvlar/Rustlang-Towers-of-Hanoi:/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] 1d4dfa08282e2ab26790b36b1335b7cee521eac68342d928636f85f229862f45
[INFO] running `"docker" "start" "-a" "1d4dfa08282e2ab26790b36b1335b7cee521eac68342d928636f85f229862f45"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/towers_of_hanoi-44ad7ea6a8e833f8
[INFO] [stderr]      Running /opt/crater/target/debug/deps/towers_of_hanoi-fa99b80047fdd736
[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] [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 towers_of_hanoi
[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" "1d4dfa08282e2ab26790b36b1335b7cee521eac68342d928636f85f229862f45"`
[INFO] running `"docker" "rm" "-f" "1d4dfa08282e2ab26790b36b1335b7cee521eac68342d928636f85f229862f45"`
[INFO] [stdout] 1d4dfa08282e2ab26790b36b1335b7cee521eac68342d928636f85f229862f45