[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-1.38-1/sources/1.37.0/gh/Rohrschacht/hashfilter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Rohrschacht/hashfilter'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Rohrschacht/hashfilter" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Rohrschacht/hashfilter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Rohrschacht/hashfilter 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 Rohrschacht/hashfilter
[INFO] finished frobbing Rohrschacht/hashfilter
[INFO] frobbed toml for Rohrschacht/hashfilter written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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[INFO] the lockfile is outdated, regenerating it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" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 Rohrschacht/hashfilter 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 2e3c019deb0ffb285c5ec4e4e2a480374146258adf36148161d9a84a0969135a
[INFO] running `"docker" "start" "-a" "2e3c019deb0ffb285c5ec4e4e2a480374146258adf36148161d9a84a0969135a"`
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling termios v0.3.1
[INFO] [stderr]    Compiling chrono v0.4.7
[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 11.85s
[INFO] running `"docker" "inspect" "2e3c019deb0ffb285c5ec4e4e2a480374146258adf36148161d9a84a0969135a"`
[INFO] running `"docker" "rm" "-f" "2e3c019deb0ffb285c5ec4e4e2a480374146258adf36148161d9a84a0969135a"`
[INFO] [stdout] 2e3c019deb0ffb285c5ec4e4e2a480374146258adf36148161d9a84a0969135a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] f1e7f80e1e73f98b136424107d78bcb5b8f5cb3d501f3462b9094c8f4d97cb5a
[INFO] running `"docker" "start" "-a" "f1e7f80e1e73f98b136424107d78bcb5b8f5cb3d501f3462b9094c8f4d97cb5a"`
[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 0.85s
[INFO] running `"docker" "inspect" "f1e7f80e1e73f98b136424107d78bcb5b8f5cb3d501f3462b9094c8f4d97cb5a"`
[INFO] running `"docker" "rm" "-f" "f1e7f80e1e73f98b136424107d78bcb5b8f5cb3d501f3462b9094c8f4d97cb5a"`
[INFO] [stdout] f1e7f80e1e73f98b136424107d78bcb5b8f5cb3d501f3462b9094c8f4d97cb5a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] c8268fe06048da3dee8bfff1a1978f03f076f923fb38f69beab37f8b3cbd7e00
[INFO] running `"docker" "start" "-a" "c8268fe06048da3dee8bfff1a1978f03f076f923fb38f69beab37f8b3cbd7e00"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/arkhash-08b4d2c0e1522ab2
[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" "c8268fe06048da3dee8bfff1a1978f03f076f923fb38f69beab37f8b3cbd7e00"`
[INFO] running `"docker" "rm" "-f" "c8268fe06048da3dee8bfff1a1978f03f076f923fb38f69beab37f8b3cbd7e00"`
[INFO] [stdout] c8268fe06048da3dee8bfff1a1978f03f076f923fb38f69beab37f8b3cbd7e00