[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-1.37-6/sources/1.36.0/gh/arjanvaneersel/sniffer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/arjanvaneersel/sniffer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/arjanvaneersel/sniffer" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/arjanvaneersel/sniffer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of arjanvaneersel/sniffer 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 arjanvaneersel/sniffer
[INFO] finished frobbing arjanvaneersel/sniffer
[INFO] frobbed toml for arjanvaneersel/sniffer written to work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing arjanvaneersel/sniffer against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] f06bbc74e512c09dded6db3190361446ab9710d2937c120584cd6d8fcd091579
[INFO] running `"docker" "start" "-a" "f06bbc74e512c09dded6db3190361446ab9710d2937c120584cd6d8fcd091579"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[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 1.88s
[INFO] running `"docker" "inspect" "f06bbc74e512c09dded6db3190361446ab9710d2937c120584cd6d8fcd091579"`
[INFO] running `"docker" "rm" "-f" "f06bbc74e512c09dded6db3190361446ab9710d2937c120584cd6d8fcd091579"`
[INFO] [stdout] f06bbc74e512c09dded6db3190361446ab9710d2937c120584cd6d8fcd091579
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] b046220f4309ccdd813bd7296cbce35b9a1a2af79aa005e059295ebcb41c7b0e
[INFO] running `"docker" "start" "-a" "b046220f4309ccdd813bd7296cbce35b9a1a2af79aa005e059295ebcb41c7b0e"`
[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 0.82s
[INFO] running `"docker" "inspect" "b046220f4309ccdd813bd7296cbce35b9a1a2af79aa005e059295ebcb41c7b0e"`
[INFO] running `"docker" "rm" "-f" "b046220f4309ccdd813bd7296cbce35b9a1a2af79aa005e059295ebcb41c7b0e"`
[INFO] [stdout] b046220f4309ccdd813bd7296cbce35b9a1a2af79aa005e059295ebcb41c7b0e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 08020f09943bb3d11c8a16802e15ede0aad99b889f148c2315efa72991327680
[INFO] running `"docker" "start" "-a" "08020f09943bb3d11c8a16802e15ede0aad99b889f148c2315efa72991327680"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sniffer-5d89cb26f6f50997
[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" "08020f09943bb3d11c8a16802e15ede0aad99b889f148c2315efa72991327680"`
[INFO] running `"docker" "rm" "-f" "08020f09943bb3d11c8a16802e15ede0aad99b889f148c2315efa72991327680"`
[INFO] [stdout] 08020f09943bb3d11c8a16802e15ede0aad99b889f148c2315efa72991327680