[INFO] updating cached repository livingsilver94/rusty_markov
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/livingsilver94/rusty_markov
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/livingsilver94/rusty_markov" "work/ex/beta-1.38-1/sources/1.37.0/gh/livingsilver94/rusty_markov"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/livingsilver94/rusty_markov'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/livingsilver94/rusty_markov" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/livingsilver94/rusty_markov"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/livingsilver94/rusty_markov'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 82bbd0a5a8b2f8ac6266f88571abcb0a915a4043
[INFO] sha for GitHub repo livingsilver94/rusty_markov: 82bbd0a5a8b2f8ac6266f88571abcb0a915a4043
[INFO] validating manifest of livingsilver94/rusty_markov 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 livingsilver94/rusty_markov 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 livingsilver94/rusty_markov
[INFO] finished frobbing livingsilver94/rusty_markov
[INFO] frobbed toml for livingsilver94/rusty_markov written to work/ex/beta-1.38-1/sources/1.37.0/gh/livingsilver94/rusty_markov/Cargo.toml
[INFO] started frobbing livingsilver94/rusty_markov
[INFO] finished frobbing livingsilver94/rusty_markov
[INFO] frobbed toml for livingsilver94/rusty_markov written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/livingsilver94/rusty_markov/Cargo.toml
[INFO] crate livingsilver94/rusty_markov 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 livingsilver94/rusty_markov 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-2/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/livingsilver94/rusty_markov:/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] 97449f1be549c9de5e9eed307fe639e008c297de465cb73fabd118c123b33d1a
[INFO] running `"docker" "start" "-a" "97449f1be549c9de5e9eed307fe639e008c297de465cb73fabd118c123b33d1a"`
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling markov_chain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.30s
[INFO] running `"docker" "inspect" "97449f1be549c9de5e9eed307fe639e008c297de465cb73fabd118c123b33d1a"`
[INFO] running `"docker" "rm" "-f" "97449f1be549c9de5e9eed307fe639e008c297de465cb73fabd118c123b33d1a"`
[INFO] [stdout] 97449f1be549c9de5e9eed307fe639e008c297de465cb73fabd118c123b33d1a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/livingsilver94/rusty_markov:/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] 8e7a52686399c188a2dfccdfb801e1144f647b06df5c1c667f2a5c58529c9202
[INFO] running `"docker" "start" "-a" "8e7a52686399c188a2dfccdfb801e1144f647b06df5c1c667f2a5c58529c9202"`
[INFO] [stderr]    Compiling markov_chain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused implementer of `std::iter::Iterator` that must be used
[INFO] [stderr]    --> src/lib.rs:206:9
[INFO] [stderr]     |
[INFO] [stderr] 206 |         map.generate_from_token(&vec![KeyPosition::Beginning; 1], 10);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: iterators are lazy and do nothing unless consumed
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.14s
[INFO] running `"docker" "inspect" "8e7a52686399c188a2dfccdfb801e1144f647b06df5c1c667f2a5c58529c9202"`
[INFO] running `"docker" "rm" "-f" "8e7a52686399c188a2dfccdfb801e1144f647b06df5c1c667f2a5c58529c9202"`
[INFO] [stdout] 8e7a52686399c188a2dfccdfb801e1144f647b06df5c1c667f2a5c58529c9202
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/livingsilver94/rusty_markov:/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] 9e728d48a5c724427bd7fc3054e0380ad434222bd9a2ceb2cec33076e478476a
[INFO] running `"docker" "start" "-a" "9e728d48a5c724427bd7fc3054e0380ad434222bd9a2ceb2cec33076e478476a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/markov_chain-97919f63b67ff744
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::train_second_order ... ok
[INFO] [stdout] test tests::chain_returns_something ... ok
[INFO] [stdout] test tests::train_first_order ... ok
[INFO] [stdout] test tests::panic_on_wrong_key_size ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/integration-bc88a80e3d90355e
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test generate_from_file ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests markov_chain
[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" "9e728d48a5c724427bd7fc3054e0380ad434222bd9a2ceb2cec33076e478476a"`
[INFO] running `"docker" "rm" "-f" "9e728d48a5c724427bd7fc3054e0380ad434222bd9a2ceb2cec33076e478476a"`
[INFO] [stdout] 9e728d48a5c724427bd7fc3054e0380ad434222bd9a2ceb2cec33076e478476a