[INFO] updating cached repository Rohrschacht/hashfilter
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Rohrschacht/hashfilter
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Rohrschacht/hashfilter" "work/ex/beta-1.37-6/sources/1.36.0/gh/Rohrschacht/hashfilter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Rohrschacht/hashfilter'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Rohrschacht/hashfilter" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Rohrschacht/hashfilter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Rohrschacht/hashfilter'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1b43d7832cad729746d31fc51698a25eaa1722eb
[INFO] sha for GitHub repo Rohrschacht/hashfilter: 1b43d7832cad729746d31fc51698a25eaa1722eb
[INFO] validating manifest of Rohrschacht/hashfilter 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 Rohrschacht/hashfilter 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 Rohrschacht/hashfilter
[INFO] finished frobbing Rohrschacht/hashfilter
[INFO] frobbed toml for Rohrschacht/hashfilter written to work/ex/beta-1.37-6/sources/1.36.0/gh/Rohrschacht/hashfilter/Cargo.toml
[INFO] started frobbing Rohrschacht/hashfilter
[INFO] finished frobbing Rohrschacht/hashfilter
[INFO] frobbed toml for Rohrschacht/hashfilter written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Rohrschacht/hashfilter/Cargo.toml
[INFO] crate Rohrschacht/hashfilter 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Rohrschacht/hashfilter/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 Rohrschacht/hashfilter 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-6/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/Rohrschacht/hashfilter:/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] 6ae9b6bb2265128eae19078f7793356d3f5b1cb903d66430d98f006c709ab55a
[INFO] running `"docker" "start" "-a" "6ae9b6bb2265128eae19078f7793356d3f5b1cb903d66430d98f006c709ab55a"`
[INFO] [stderr]    Compiling arkhash v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/update.rs:148:13
[INFO] [stderr]     |
[INFO] [stderr] 148 |         let mut file = OpenOptions::new().create(true).append(true).open(filepath);
[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 4.34s
[INFO] running `"docker" "inspect" "6ae9b6bb2265128eae19078f7793356d3f5b1cb903d66430d98f006c709ab55a"`
[INFO] running `"docker" "rm" "-f" "6ae9b6bb2265128eae19078f7793356d3f5b1cb903d66430d98f006c709ab55a"`
[INFO] [stdout] 6ae9b6bb2265128eae19078f7793356d3f5b1cb903d66430d98f006c709ab55a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/Rohrschacht/hashfilter:/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] ef30b5e1390b3509a8a64c81715d04ea5ddbc27760042bfe07b571de7873b0df
[INFO] running `"docker" "start" "-a" "ef30b5e1390b3509a8a64c81715d04ea5ddbc27760042bfe07b571de7873b0df"`
[INFO] [stderr]    Compiling arkhash v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/update.rs:148:13
[INFO] [stderr]     |
[INFO] [stderr] 148 |         let mut file = OpenOptions::new().create(true).append(true).open(filepath);
[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 1.08s
[INFO] running `"docker" "inspect" "ef30b5e1390b3509a8a64c81715d04ea5ddbc27760042bfe07b571de7873b0df"`
[INFO] running `"docker" "rm" "-f" "ef30b5e1390b3509a8a64c81715d04ea5ddbc27760042bfe07b571de7873b0df"`
[INFO] [stdout] ef30b5e1390b3509a8a64c81715d04ea5ddbc27760042bfe07b571de7873b0df
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/Rohrschacht/hashfilter:/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] d22d435ea30cd76262c3a8df0d4f1a24a2c7b52b25b393b779cddb9d252d257a
[INFO] running `"docker" "start" "-a" "d22d435ea30cd76262c3a8df0d4f1a24a2c7b52b25b393b779cddb9d252d257a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/arkhash-244983424ac7649a
[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" "d22d435ea30cd76262c3a8df0d4f1a24a2c7b52b25b393b779cddb9d252d257a"`
[INFO] running `"docker" "rm" "-f" "d22d435ea30cd76262c3a8df0d4f1a24a2c7b52b25b393b779cddb9d252d257a"`
[INFO] [stdout] d22d435ea30cd76262c3a8df0d4f1a24a2c7b52b25b393b779cddb9d252d257a