[INFO] updating cached repository mau5atron/ip_sniffer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mau5atron/ip_sniffer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mau5atron/ip_sniffer" "work/ex/beta-1.38-1/sources/1.37.0/gh/mau5atron/ip_sniffer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mau5atron/ip_sniffer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mau5atron/ip_sniffer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mau5atron/ip_sniffer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mau5atron/ip_sniffer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 47a2b8d3bcd2859f6b0f77d5a91a47171e587deb
[INFO] sha for GitHub repo mau5atron/ip_sniffer: 47a2b8d3bcd2859f6b0f77d5a91a47171e587deb
[INFO] validating manifest of mau5atron/ip_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 mau5atron/ip_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 mau5atron/ip_sniffer
[INFO] finished frobbing mau5atron/ip_sniffer
[INFO] frobbed toml for mau5atron/ip_sniffer written to work/ex/beta-1.38-1/sources/1.37.0/gh/mau5atron/ip_sniffer/Cargo.toml
[INFO] started frobbing mau5atron/ip_sniffer
[INFO] finished frobbing mau5atron/ip_sniffer
[INFO] frobbed toml for mau5atron/ip_sniffer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mau5atron/ip_sniffer/Cargo.toml
[INFO] crate mau5atron/ip_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] testing mau5atron/ip_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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mau5atron/ip_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] 6c23ce932858ee69b0f3aa94f60075f408c93fa39e6ff6d16b9c23dff485246a
[INFO] running `"docker" "start" "-a" "6c23ce932858ee69b0f3aa94f60075f408c93fa39e6ff6d16b9c23dff485246a"`
[INFO] [stderr]    Compiling ip_sniffer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `flag`
[INFO] [stderr]   --> src/main.rs:14:2
[INFO] [stderr]    |
[INFO] [stderr] 14 |     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 2.10s
[INFO] running `"docker" "inspect" "6c23ce932858ee69b0f3aa94f60075f408c93fa39e6ff6d16b9c23dff485246a"`
[INFO] running `"docker" "rm" "-f" "6c23ce932858ee69b0f3aa94f60075f408c93fa39e6ff6d16b9c23dff485246a"`
[INFO] [stdout] 6c23ce932858ee69b0f3aa94f60075f408c93fa39e6ff6d16b9c23dff485246a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mau5atron/ip_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] 49ad32b7b17ee42d0f2bf9bce625c3f48601aa7d1567d300e3393e672ff91ff1
[INFO] running `"docker" "start" "-a" "49ad32b7b17ee42d0f2bf9bce625c3f48601aa7d1567d300e3393e672ff91ff1"`
[INFO] [stderr]    Compiling ip_sniffer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `flag`
[INFO] [stderr]   --> src/main.rs:14:2
[INFO] [stderr]    |
[INFO] [stderr] 14 |     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 0.92s
[INFO] running `"docker" "inspect" "49ad32b7b17ee42d0f2bf9bce625c3f48601aa7d1567d300e3393e672ff91ff1"`
[INFO] running `"docker" "rm" "-f" "49ad32b7b17ee42d0f2bf9bce625c3f48601aa7d1567d300e3393e672ff91ff1"`
[INFO] [stdout] 49ad32b7b17ee42d0f2bf9bce625c3f48601aa7d1567d300e3393e672ff91ff1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mau5atron/ip_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] 7b2930ba1f1e299967c5e0ab8e8150b6afa32ec5182ffaf65835acaf0a81722d
[INFO] running `"docker" "start" "-a" "7b2930ba1f1e299967c5e0ab8e8150b6afa32ec5182ffaf65835acaf0a81722d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ip_sniffer-3ebe61e9c82f4cbe
[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" "7b2930ba1f1e299967c5e0ab8e8150b6afa32ec5182ffaf65835acaf0a81722d"`
[INFO] running `"docker" "rm" "-f" "7b2930ba1f1e299967c5e0ab8e8150b6afa32ec5182ffaf65835acaf0a81722d"`
[INFO] [stdout] 7b2930ba1f1e299967c5e0ab8e8150b6afa32ec5182ffaf65835acaf0a81722d