[INFO] updating cached repository serprex/earleyplay
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/serprex/earleyplay
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/serprex/earleyplay" "work/ex/beta-1.37-6/sources/1.36.0/gh/serprex/earleyplay"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/serprex/earleyplay'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/serprex/earleyplay" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/serprex/earleyplay"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/serprex/earleyplay'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bb1aec9cd00f1378a02768d8b2ba3575ba5b4bfa
[INFO] sha for GitHub repo serprex/earleyplay: bb1aec9cd00f1378a02768d8b2ba3575ba5b4bfa
[INFO] validating manifest of serprex/earleyplay 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 serprex/earleyplay 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 serprex/earleyplay
[INFO] finished frobbing serprex/earleyplay
[INFO] frobbed toml for serprex/earleyplay written to work/ex/beta-1.37-6/sources/1.36.0/gh/serprex/earleyplay/Cargo.toml
[INFO] started frobbing serprex/earleyplay
[INFO] finished frobbing serprex/earleyplay
[INFO] frobbed toml for serprex/earleyplay written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/serprex/earleyplay/Cargo.toml
[INFO] crate serprex/earleyplay 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] testing serprex/earleyplay 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-7/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/serprex/earleyplay:/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] 4e6457340999a34c8de2181f6d33841ad8a74a84c2dc7474e913dbc6beda2907
[INFO] running `"docker" "start" "-a" "4e6457340999a34c8de2181f6d33841ad8a74a84c2dc7474e913dbc6beda2907"`
[INFO] [stderr]    Compiling earleyplay v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:195:29
[INFO] [stderr]     |
[INFO] [stderr] 195 |                         let mut stateset = &mut statesets[i];
[INFO] [stderr]     |                             ----^^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "4e6457340999a34c8de2181f6d33841ad8a74a84c2dc7474e913dbc6beda2907"`
[INFO] running `"docker" "rm" "-f" "4e6457340999a34c8de2181f6d33841ad8a74a84c2dc7474e913dbc6beda2907"`
[INFO] [stdout] 4e6457340999a34c8de2181f6d33841ad8a74a84c2dc7474e913dbc6beda2907
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/serprex/earleyplay:/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] 7f940fa0166159f1331990bc0647604a39c5a2d04dd56533b5be018d5b9a2014
[INFO] running `"docker" "start" "-a" "7f940fa0166159f1331990bc0647604a39c5a2d04dd56533b5be018d5b9a2014"`
[INFO] [stderr]    Compiling earleyplay v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:195:29
[INFO] [stderr]     |
[INFO] [stderr] 195 |                         let mut stateset = &mut statesets[i];
[INFO] [stderr]     |                             ----^^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `"docker" "inspect" "7f940fa0166159f1331990bc0647604a39c5a2d04dd56533b5be018d5b9a2014"`
[INFO] running `"docker" "rm" "-f" "7f940fa0166159f1331990bc0647604a39c5a2d04dd56533b5be018d5b9a2014"`
[INFO] [stdout] 7f940fa0166159f1331990bc0647604a39c5a2d04dd56533b5be018d5b9a2014
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/serprex/earleyplay:/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] 19fa711fb5c6170bac35123c57dfd8bb48fb32b36e55cda5902d983bd52f983e
[INFO] running `"docker" "start" "-a" "19fa711fb5c6170bac35123c57dfd8bb48fb32b36e55cda5902d983bd52f983e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/earleyplay-170800e1f39a7d02
[INFO] [stderr]    Doc-tests earleyplay
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 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" "19fa711fb5c6170bac35123c57dfd8bb48fb32b36e55cda5902d983bd52f983e"`
[INFO] running `"docker" "rm" "-f" "19fa711fb5c6170bac35123c57dfd8bb48fb32b36e55cda5902d983bd52f983e"`
[INFO] [stdout] 19fa711fb5c6170bac35123c57dfd8bb48fb32b36e55cda5902d983bd52f983e