[INFO] updating cached repository brettcannon/flatten_filenames
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/brettcannon/flatten_filenames
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/brettcannon/flatten_filenames" "work/ex/beta-1.37-6/sources/1.36.0/gh/brettcannon/flatten_filenames"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/brettcannon/flatten_filenames'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/brettcannon/flatten_filenames" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/brettcannon/flatten_filenames"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/brettcannon/flatten_filenames'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 07caf91067bc8f95b5d87403cba8d100511eb9a9
[INFO] sha for GitHub repo brettcannon/flatten_filenames: 07caf91067bc8f95b5d87403cba8d100511eb9a9
[INFO] validating manifest of brettcannon/flatten_filenames 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 brettcannon/flatten_filenames 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 brettcannon/flatten_filenames
[INFO] finished frobbing brettcannon/flatten_filenames
[INFO] frobbed toml for brettcannon/flatten_filenames written to work/ex/beta-1.37-6/sources/1.36.0/gh/brettcannon/flatten_filenames/Cargo.toml
[INFO] started frobbing brettcannon/flatten_filenames
[INFO] finished frobbing brettcannon/flatten_filenames
[INFO] frobbed toml for brettcannon/flatten_filenames written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/brettcannon/flatten_filenames/Cargo.toml
[INFO] crate brettcannon/flatten_filenames 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing brettcannon/flatten_filenames 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-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/brettcannon/flatten_filenames:/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] b30c96295c0cfc98b7000df8bdd5d4ede37dc020b9f0bdeedd390a5e6e8655f5
[INFO] running `"docker" "start" "-a" "b30c96295c0cfc98b7000df8bdd5d4ede37dc020b9f0bdeedd390a5e6e8655f5"`
[INFO] [stderr]    Compiling flatten_filenames v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "b30c96295c0cfc98b7000df8bdd5d4ede37dc020b9f0bdeedd390a5e6e8655f5"`
[INFO] running `"docker" "rm" "-f" "b30c96295c0cfc98b7000df8bdd5d4ede37dc020b9f0bdeedd390a5e6e8655f5"`
[INFO] [stdout] b30c96295c0cfc98b7000df8bdd5d4ede37dc020b9f0bdeedd390a5e6e8655f5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/brettcannon/flatten_filenames:/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] 1b50db8945ff98f1e15360843faf7bd3b1b96cd5bd3c683ff11ada08f97ee7f5
[INFO] running `"docker" "start" "-a" "1b50db8945ff98f1e15360843faf7bd3b1b96cd5bd3c683ff11ada08f97ee7f5"`
[INFO] [stderr]    Compiling libc v0.2.15
[INFO] [stderr]    Compiling rand v0.3.14
[INFO] [stderr]    Compiling tempdir v0.3.5
[INFO] [stderr]    Compiling flatten_filenames v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.30s
[INFO] running `"docker" "inspect" "1b50db8945ff98f1e15360843faf7bd3b1b96cd5bd3c683ff11ada08f97ee7f5"`
[INFO] running `"docker" "rm" "-f" "1b50db8945ff98f1e15360843faf7bd3b1b96cd5bd3c683ff11ada08f97ee7f5"`
[INFO] [stdout] 1b50db8945ff98f1e15360843faf7bd3b1b96cd5bd3c683ff11ada08f97ee7f5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/brettcannon/flatten_filenames:/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] b07a7af85e4a36201146f6b09796fa79be6d35a58039c6fe9d38ee3204ebb2b7
[INFO] running `"docker" "start" "-a" "b07a7af85e4a36201146f6b09796fa79be6d35a58039c6fe9d38ee3204ebb2b7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/flatten_filenames-fa9551e121ed84ab
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test test::should_traverse_directory ... ok
[INFO] [stdout] test test::leading_char_for_filename ... ok
[INFO] [stdout] test test::new_prefix_empty_old_prefix ... ok
[INFO] [stdout] test test::should_traverse_not_leading_dot_or_underscore ... ok
[INFO] [stdout] test test::new_prefix_leading_dash_or_plus ... ok
[INFO] [stdout] test test::new_prefix_works ... ok
[INFO] [stdout] test test::rename_works ... ok
[INFO] [stdout] test test::should_traverse_not_dir ... ok
[INFO] [stdout] test test::rename_skips_dot_files ... ok
[INFO] [stdout] test test::flatten_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "b07a7af85e4a36201146f6b09796fa79be6d35a58039c6fe9d38ee3204ebb2b7"`
[INFO] running `"docker" "rm" "-f" "b07a7af85e4a36201146f6b09796fa79be6d35a58039c6fe9d38ee3204ebb2b7"`
[INFO] [stdout] b07a7af85e4a36201146f6b09796fa79be6d35a58039c6fe9d38ee3204ebb2b7