[INFO] updating cached repository arjanvaneersel/sniffer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/arjanvaneersel/sniffer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/arjanvaneersel/sniffer" "work/ex/beta-1.38-1/sources/1.37.0/gh/arjanvaneersel/sniffer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/arjanvaneersel/sniffer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/arjanvaneersel/sniffer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/arjanvaneersel/sniffer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/arjanvaneersel/sniffer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] dcaa2e260ed61ee7e7dd9a224b57593972c47b00
[INFO] sha for GitHub repo arjanvaneersel/sniffer: dcaa2e260ed61ee7e7dd9a224b57593972c47b00
[INFO] validating manifest of arjanvaneersel/sniffer 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 arjanvaneersel/sniffer 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 arjanvaneersel/sniffer
[INFO] finished frobbing arjanvaneersel/sniffer
[INFO] frobbed toml for arjanvaneersel/sniffer written to work/ex/beta-1.38-1/sources/1.37.0/gh/arjanvaneersel/sniffer/Cargo.toml
[INFO] started frobbing arjanvaneersel/sniffer
[INFO] finished frobbing arjanvaneersel/sniffer
[INFO] frobbed toml for arjanvaneersel/sniffer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/arjanvaneersel/sniffer/Cargo.toml
[INFO] crate arjanvaneersel/sniffer 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing arjanvaneersel/sniffer 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/arjanvaneersel/sniffer:/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] 8a1d5fe4fe01e857bccd30acf33576f8bb3726bc75998b88e0ff3de85251dd0b
[INFO] running `"docker" "start" "-a" "8a1d5fe4fe01e857bccd30acf33576f8bb3726bc75998b88e0ff3de85251dd0b"`
[INFO] [stderr]    Compiling sniffer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `flag`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     flag: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `"docker" "inspect" "8a1d5fe4fe01e857bccd30acf33576f8bb3726bc75998b88e0ff3de85251dd0b"`
[INFO] running `"docker" "rm" "-f" "8a1d5fe4fe01e857bccd30acf33576f8bb3726bc75998b88e0ff3de85251dd0b"`
[INFO] [stdout] 8a1d5fe4fe01e857bccd30acf33576f8bb3726bc75998b88e0ff3de85251dd0b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/arjanvaneersel/sniffer:/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] 474f513a14d4ee23ababd4bac042b35b270ab9320f7a96be4484c299961cd838
[INFO] running `"docker" "start" "-a" "474f513a14d4ee23ababd4bac042b35b270ab9320f7a96be4484c299961cd838"`
[INFO] [stderr]    Compiling sniffer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `flag`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     flag: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "474f513a14d4ee23ababd4bac042b35b270ab9320f7a96be4484c299961cd838"`
[INFO] running `"docker" "rm" "-f" "474f513a14d4ee23ababd4bac042b35b270ab9320f7a96be4484c299961cd838"`
[INFO] [stdout] 474f513a14d4ee23ababd4bac042b35b270ab9320f7a96be4484c299961cd838
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/arjanvaneersel/sniffer:/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] 3cd5d6ff0a08f8074718e2ddfe9b1b13969aecedf9509599195cc60d56742e0e
[INFO] running `"docker" "start" "-a" "3cd5d6ff0a08f8074718e2ddfe9b1b13969aecedf9509599195cc60d56742e0e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sniffer-a51df3fa00b3c0d8
[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" "3cd5d6ff0a08f8074718e2ddfe9b1b13969aecedf9509599195cc60d56742e0e"`
[INFO] running `"docker" "rm" "-f" "3cd5d6ff0a08f8074718e2ddfe9b1b13969aecedf9509599195cc60d56742e0e"`
[INFO] [stdout] 3cd5d6ff0a08f8074718e2ddfe9b1b13969aecedf9509599195cc60d56742e0e