[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-1.38-1/sources/1.37.0/gh/serprex/earleyplay"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/serprex/earleyplay'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/serprex/earleyplay" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/serprex/earleyplay"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of serprex/earleyplay 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 serprex/earleyplay
[INFO] finished frobbing serprex/earleyplay
[INFO] frobbed toml for serprex/earleyplay written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "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 serprex/earleyplay 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-5/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/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 05e04746f09ccb55ca9a070c58edc3841ec063dd69928da86b61ef7f093e2e87
[INFO] running `"docker" "start" "-a" "05e04746f09ccb55ca9a070c58edc3841ec063dd69928da86b61ef7f093e2e87"`
[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 0.61s
[INFO] running `"docker" "inspect" "05e04746f09ccb55ca9a070c58edc3841ec063dd69928da86b61ef7f093e2e87"`
[INFO] running `"docker" "rm" "-f" "05e04746f09ccb55ca9a070c58edc3841ec063dd69928da86b61ef7f093e2e87"`
[INFO] [stdout] 05e04746f09ccb55ca9a070c58edc3841ec063dd69928da86b61ef7f093e2e87
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 70e677f41d0b0fa9da33dad442b9a44e3eec6ff2f84fd8219e3171aead4c9f86
[INFO] running `"docker" "start" "-a" "70e677f41d0b0fa9da33dad442b9a44e3eec6ff2f84fd8219e3171aead4c9f86"`
[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 1.06s
[INFO] running `"docker" "inspect" "70e677f41d0b0fa9da33dad442b9a44e3eec6ff2f84fd8219e3171aead4c9f86"`
[INFO] running `"docker" "rm" "-f" "70e677f41d0b0fa9da33dad442b9a44e3eec6ff2f84fd8219e3171aead4c9f86"`
[INFO] [stdout] 70e677f41d0b0fa9da33dad442b9a44e3eec6ff2f84fd8219e3171aead4c9f86
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 530c1f267224d19e0baa702ed101972ff96ec800c38fc299a368948056356e5a
[INFO] running `"docker" "start" "-a" "530c1f267224d19e0baa702ed101972ff96ec800c38fc299a368948056356e5a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/earleyplay-f770d124f3801c76
[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] [stderr]    Doc-tests earleyplay
[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" "530c1f267224d19e0baa702ed101972ff96ec800c38fc299a368948056356e5a"`
[INFO] running `"docker" "rm" "-f" "530c1f267224d19e0baa702ed101972ff96ec800c38fc299a368948056356e5a"`
[INFO] [stdout] 530c1f267224d19e0baa702ed101972ff96ec800c38fc299a368948056356e5a