[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-1.37-6/sources/1.36.0/gh/binocvlar/Rustlang-Towers-of-Hanoi"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/gh/binocvlar/Rustlang-Towers-of-Hanoi"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of binocvlar/Rustlang-Towers-of-Hanoi 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 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-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing binocvlar/Rustlang-Towers-of-Hanoi 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-4/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/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] cda04e672424f1f542acee7d5a39cc03bc4a75158371b7d18b73ea8abef44f3b
[INFO] running `"docker" "start" "-a" "cda04e672424f1f542acee7d5a39cc03bc4a75158371b7d18b73ea8abef44f3b"`
[INFO] [stderr]    Compiling termion v1.5.1
[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 4.06s
[INFO] running `"docker" "inspect" "cda04e672424f1f542acee7d5a39cc03bc4a75158371b7d18b73ea8abef44f3b"`
[INFO] running `"docker" "rm" "-f" "cda04e672424f1f542acee7d5a39cc03bc4a75158371b7d18b73ea8abef44f3b"`
[INFO] [stdout] cda04e672424f1f542acee7d5a39cc03bc4a75158371b7d18b73ea8abef44f3b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] e823affd362c5b149031cf74d63b30ba90ab39862c65009ac0fc7950ac3ea716
[INFO] running `"docker" "start" "-a" "e823affd362c5b149031cf74d63b30ba90ab39862c65009ac0fc7950ac3ea716"`
[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 1.28s
[INFO] running `"docker" "inspect" "e823affd362c5b149031cf74d63b30ba90ab39862c65009ac0fc7950ac3ea716"`
[INFO] running `"docker" "rm" "-f" "e823affd362c5b149031cf74d63b30ba90ab39862c65009ac0fc7950ac3ea716"`
[INFO] [stdout] e823affd362c5b149031cf74d63b30ba90ab39862c65009ac0fc7950ac3ea716
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 30c84de417243b9afbdb167996f286c13f39110db6051ead9d75be512cb5d52f
[INFO] running `"docker" "start" "-a" "30c84de417243b9afbdb167996f286c13f39110db6051ead9d75be512cb5d52f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/towers_of_hanoi-c90c75316d552b53
[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-700cf5d1352edaa0
[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" "30c84de417243b9afbdb167996f286c13f39110db6051ead9d75be512cb5d52f"`
[INFO] running `"docker" "rm" "-f" "30c84de417243b9afbdb167996f286c13f39110db6051ead9d75be512cb5d52f"`
[INFO] [stdout] 30c84de417243b9afbdb167996f286c13f39110db6051ead9d75be512cb5d52f