[INFO] updating cached repository ngyihsin/grep
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ngyihsin/grep
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ngyihsin/grep" "work/ex/beta-1.38-1/sources/1.37.0/gh/ngyihsin/grep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ngyihsin/grep'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ngyihsin/grep" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ngyihsin/grep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ngyihsin/grep'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e1a5db2cfc21f73f733cfe8aa2a76c6eb6b2abec
[INFO] sha for GitHub repo ngyihsin/grep: e1a5db2cfc21f73f733cfe8aa2a76c6eb6b2abec
[INFO] validating manifest of ngyihsin/grep 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 ngyihsin/grep 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 ngyihsin/grep
[INFO] finished frobbing ngyihsin/grep
[INFO] frobbed toml for ngyihsin/grep written to work/ex/beta-1.38-1/sources/1.37.0/gh/ngyihsin/grep/Cargo.toml
[INFO] started frobbing ngyihsin/grep
[INFO] finished frobbing ngyihsin/grep
[INFO] frobbed toml for ngyihsin/grep written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ngyihsin/grep/Cargo.toml
[INFO] crate ngyihsin/grep 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 ngyihsin/grep 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/ngyihsin/grep:/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] ec3ec098feb2b7d53d4dc21e8f3a790fa028612ef5c5050d49683f93bfd5cebf
[INFO] running `"docker" "start" "-a" "ec3ec098feb2b7d53d4dc21e8f3a790fa028612ef5c5050d49683f93bfd5cebf"`
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/grep.rs:42:52
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn visit_dirs(query: &String, dir: &Path, cb: &Fn(&String, &DirEntry)) -> io::Result<()> {
[INFO] [stderr]    |                                                    ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&String, &DirEntry)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/grep.rs:25:11
[INFO] [stderr]    |
[INFO] [stderr] 25 |       let mut p = Config {file_path: file_path, query: query, result: Vec::new()};
[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 1.38s
[INFO] running `"docker" "inspect" "ec3ec098feb2b7d53d4dc21e8f3a790fa028612ef5c5050d49683f93bfd5cebf"`
[INFO] running `"docker" "rm" "-f" "ec3ec098feb2b7d53d4dc21e8f3a790fa028612ef5c5050d49683f93bfd5cebf"`
[INFO] [stdout] ec3ec098feb2b7d53d4dc21e8f3a790fa028612ef5c5050d49683f93bfd5cebf
[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/ngyihsin/grep:/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] c483eac26643d7bf921b36595fc6042aa42028be27f3ad4926f961ba7c72b730
[INFO] running `"docker" "start" "-a" "c483eac26643d7bf921b36595fc6042aa42028be27f3ad4926f961ba7c72b730"`
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/grep.rs:42:52
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn visit_dirs(query: &String, dir: &Path, cb: &Fn(&String, &DirEntry)) -> io::Result<()> {
[INFO] [stderr]    |                                                    ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&String, &DirEntry)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/grep.rs:25:11
[INFO] [stderr]    |
[INFO] [stderr] 25 |       let mut p = Config {file_path: file_path, query: query, result: Vec::new()};
[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 0.74s
[INFO] running `"docker" "inspect" "c483eac26643d7bf921b36595fc6042aa42028be27f3ad4926f961ba7c72b730"`
[INFO] running `"docker" "rm" "-f" "c483eac26643d7bf921b36595fc6042aa42028be27f3ad4926f961ba7c72b730"`
[INFO] [stdout] c483eac26643d7bf921b36595fc6042aa42028be27f3ad4926f961ba7c72b730
[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/ngyihsin/grep:/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] c86f2a5f1f8201f7bdbd9c0bce54c49fb5bc935615bc9a7b88d98911bc45df84
[INFO] running `"docker" "start" "-a" "c86f2a5f1f8201f7bdbd9c0bce54c49fb5bc935615bc9a7b88d98911bc45df84"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello-e416ede7c6fa78fa
[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" "c86f2a5f1f8201f7bdbd9c0bce54c49fb5bc935615bc9a7b88d98911bc45df84"`
[INFO] running `"docker" "rm" "-f" "c86f2a5f1f8201f7bdbd9c0bce54c49fb5bc935615bc9a7b88d98911bc45df84"`
[INFO] [stdout] c86f2a5f1f8201f7bdbd9c0bce54c49fb5bc935615bc9a7b88d98911bc45df84