[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 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] abb8113add6a9fde2d2303cac9b91c72b1fc358823b7d29dcd22890f2d6caa63
[INFO] running `"docker" "start" "-a" "abb8113add6a9fde2d2303cac9b91c72b1fc358823b7d29dcd22890f2d6caa63"`
[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 2.46s
[INFO] running `"docker" "inspect" "abb8113add6a9fde2d2303cac9b91c72b1fc358823b7d29dcd22890f2d6caa63"`
[INFO] running `"docker" "rm" "-f" "abb8113add6a9fde2d2303cac9b91c72b1fc358823b7d29dcd22890f2d6caa63"`
[INFO] [stdout] abb8113add6a9fde2d2303cac9b91c72b1fc358823b7d29dcd22890f2d6caa63
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 72dc4dc66319697484c8516eb05d161bff406c53da02554acb1f5b47a6ac33da
[INFO] running `"docker" "start" "-a" "72dc4dc66319697484c8516eb05d161bff406c53da02554acb1f5b47a6ac33da"`
[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 1.37s
[INFO] running `"docker" "inspect" "72dc4dc66319697484c8516eb05d161bff406c53da02554acb1f5b47a6ac33da"`
[INFO] running `"docker" "rm" "-f" "72dc4dc66319697484c8516eb05d161bff406c53da02554acb1f5b47a6ac33da"`
[INFO] [stdout] 72dc4dc66319697484c8516eb05d161bff406c53da02554acb1f5b47a6ac33da
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 7d14c0def145e72944ccf6953d8179adcc20915fc2878e90aae24cc1ccde1a6f
[INFO] running `"docker" "start" "-a" "7d14c0def145e72944ccf6953d8179adcc20915fc2878e90aae24cc1ccde1a6f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/towers_of_hanoi-71959a37c13aee33
[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]      Running /opt/crater/target/debug/deps/towers_of_hanoi-17487e280e6e78cf
[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] [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" "7d14c0def145e72944ccf6953d8179adcc20915fc2878e90aae24cc1ccde1a6f"`
[INFO] running `"docker" "rm" "-f" "7d14c0def145e72944ccf6953d8179adcc20915fc2878e90aae24cc1ccde1a6f"`
[INFO] [stdout] 7d14c0def145e72944ccf6953d8179adcc20915fc2878e90aae24cc1ccde1a6f