[INFO] updating cached repository zoewithabang/rust-markov-chain
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/zoewithabang/rust-markov-chain
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/zoewithabang/rust-markov-chain" "work/ex/beta-1.38-1/sources/1.37.0/gh/zoewithabang/rust-markov-chain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/zoewithabang/rust-markov-chain'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/zoewithabang/rust-markov-chain" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zoewithabang/rust-markov-chain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zoewithabang/rust-markov-chain'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bf3658652f55d8bfc018ff0b598741a6c2892429
[INFO] sha for GitHub repo zoewithabang/rust-markov-chain: bf3658652f55d8bfc018ff0b598741a6c2892429
[INFO] validating manifest of zoewithabang/rust-markov-chain 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 zoewithabang/rust-markov-chain 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 zoewithabang/rust-markov-chain
[INFO] finished frobbing zoewithabang/rust-markov-chain
[INFO] frobbed toml for zoewithabang/rust-markov-chain written to work/ex/beta-1.38-1/sources/1.37.0/gh/zoewithabang/rust-markov-chain/Cargo.toml
[INFO] started frobbing zoewithabang/rust-markov-chain
[INFO] finished frobbing zoewithabang/rust-markov-chain
[INFO] frobbed toml for zoewithabang/rust-markov-chain written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zoewithabang/rust-markov-chain/Cargo.toml
[INFO] crate zoewithabang/rust-markov-chain 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 zoewithabang/rust-markov-chain 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/zoewithabang/rust-markov-chain:/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] 1540edb6b72bb109de810beb5f880cbc1fecc47a438fd0e5a66bafd707d53b71
[INFO] running `"docker" "start" "-a" "1540edb6b72bb109de810beb5f880cbc1fecc47a438fd0e5a66bafd707d53b71"`
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling syn v0.15.32
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling serde v1.0.90
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling static_assertions v0.2.5
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling opaque-debug v0.2.2
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling mysql v16.0.0
[INFO] [stderr]    Compiling sha1 v0.6.0
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling block-padding v0.1.3
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling nix v0.13.0
[INFO] [stderr]    Compiling stackvector v1.0.2
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling lexical-core v0.4.0
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]    Compiling flate2 v1.0.7
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling twox-hash v1.2.0
[INFO] [stderr]    Compiling lexical v2.1.0
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling dotenv v0.13.0
[INFO] [stderr]    Compiling mysql_common v0.17.0
[INFO] [stderr]    Compiling markov v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `prefix_size`
[INFO] [stderr]   --> src/markov.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     prefix_size: &u32,
[INFO] [stderr]    |     ^^^^^^^^^^^ help: consider prefixing with an underscore: `_prefix_size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 17s
[INFO] running `"docker" "inspect" "1540edb6b72bb109de810beb5f880cbc1fecc47a438fd0e5a66bafd707d53b71"`
[INFO] running `"docker" "rm" "-f" "1540edb6b72bb109de810beb5f880cbc1fecc47a438fd0e5a66bafd707d53b71"`
[INFO] [stdout] 1540edb6b72bb109de810beb5f880cbc1fecc47a438fd0e5a66bafd707d53b71
[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/zoewithabang/rust-markov-chain:/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] 359c95e4eb67a8e19de7d8b9fed1382b91e0654cc66c73cd43d738386b9a4c48
[INFO] running `"docker" "start" "-a" "359c95e4eb67a8e19de7d8b9fed1382b91e0654cc66c73cd43d738386b9a4c48"`
[INFO] [stderr]    Compiling markov v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `prefix_size`
[INFO] [stderr]   --> src/markov.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     prefix_size: &u32,
[INFO] [stderr]    |     ^^^^^^^^^^^ help: consider prefixing with an underscore: `_prefix_size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]   --> src/markov_table.rs:93:13
[INFO] [stderr]    |
[INFO] [stderr] 93 |         let output = build_markov_table(source_messages, prefix_size);
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_output`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.10s
[INFO] running `"docker" "inspect" "359c95e4eb67a8e19de7d8b9fed1382b91e0654cc66c73cd43d738386b9a4c48"`
[INFO] running `"docker" "rm" "-f" "359c95e4eb67a8e19de7d8b9fed1382b91e0654cc66c73cd43d738386b9a4c48"`
[INFO] [stdout] 359c95e4eb67a8e19de7d8b9fed1382b91e0654cc66c73cd43d738386b9a4c48
[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/zoewithabang/rust-markov-chain:/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] 3b891b79873d3cae74e8d371c2f8a17d26ad5814f2541e7477e69ac10defd682
[INFO] running `"docker" "start" "-a" "3b891b79873d3cae74e8d371c2f8a17d26ad5814f2541e7477e69ac10defd682"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/markov-cf0dabd67c232252
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test markov::markov_tests::get_initial_prefix_test ... ok
[INFO] [stdout] test markov_table::markov_table_tests::build_markov_table_initial_test ... ok
[INFO] [stdout] test markov_table::markov_table_tests::time_for_large_message_pool ... test markov_table::markov_table_tests::time_for_large_message_pool has been running for over 60 seconds
[INFO] [stdout] test markov_table::markov_table_tests::time_for_large_message_pool ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "3b891b79873d3cae74e8d371c2f8a17d26ad5814f2541e7477e69ac10defd682"`
[INFO] running `"docker" "rm" "-f" "3b891b79873d3cae74e8d371c2f8a17d26ad5814f2541e7477e69ac10defd682"`
[INFO] [stdout] 3b891b79873d3cae74e8d371c2f8a17d26ad5814f2541e7477e69ac10defd682