[INFO] updating cached repository remychantenay/rust-microgrep
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/remychantenay/rust-microgrep
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/remychantenay/rust-microgrep" "work/ex/beta-1.37-6/sources/1.36.0/gh/remychantenay/rust-microgrep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/remychantenay/rust-microgrep'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/remychantenay/rust-microgrep" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/remychantenay/rust-microgrep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/remychantenay/rust-microgrep'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 85abd52e7bb7023ef68c154747948495bf024fc3
[INFO] sha for GitHub repo remychantenay/rust-microgrep: 85abd52e7bb7023ef68c154747948495bf024fc3
[INFO] validating manifest of remychantenay/rust-microgrep 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 remychantenay/rust-microgrep 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 remychantenay/rust-microgrep
[INFO] finished frobbing remychantenay/rust-microgrep
[INFO] frobbed toml for remychantenay/rust-microgrep written to work/ex/beta-1.37-6/sources/1.36.0/gh/remychantenay/rust-microgrep/Cargo.toml
[INFO] started frobbing remychantenay/rust-microgrep
[INFO] finished frobbing remychantenay/rust-microgrep
[INFO] frobbed toml for remychantenay/rust-microgrep written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/remychantenay/rust-microgrep/Cargo.toml
[INFO] crate remychantenay/rust-microgrep 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing remychantenay/rust-microgrep against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/remychantenay/rust-microgrep:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] ddc39d32c95dd4463c80fc984f9cd0e4a9e3575043f3b28b56c6bd5b6484db97
[INFO] running `"docker" "start" "-a" "ddc39d32c95dd4463c80fc984f9cd0e4a9e3575043f3b28b56c6bd5b6484db97"`
[INFO] [stderr]    Compiling microgrep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/io/mod.rs:5:61
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn file_to_string(filename: &str) -> Result<String, Box<Error>> {
[INFO] [stderr]   |                                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:40:46
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub fn run(config: Config) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let mut search_results: Vec<&str>;
[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 1.84s
[INFO] running `"docker" "inspect" "ddc39d32c95dd4463c80fc984f9cd0e4a9e3575043f3b28b56c6bd5b6484db97"`
[INFO] running `"docker" "rm" "-f" "ddc39d32c95dd4463c80fc984f9cd0e4a9e3575043f3b28b56c6bd5b6484db97"`
[INFO] [stdout] ddc39d32c95dd4463c80fc984f9cd0e4a9e3575043f3b28b56c6bd5b6484db97
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/remychantenay/rust-microgrep:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] c81fcad685806b4efe65f25e15539cca94ab0403d319f7f93adb1dbfffd102ac
[INFO] running `"docker" "start" "-a" "c81fcad685806b4efe65f25e15539cca94ab0403d319f7f93adb1dbfffd102ac"`
[INFO] [stderr]    Compiling microgrep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/io/mod.rs:5:61
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn file_to_string(filename: &str) -> Result<String, Box<Error>> {
[INFO] [stderr]   |                                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:40:46
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub fn run(config: Config) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let mut search_results: Vec<&str>;
[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 2.12s
[INFO] running `"docker" "inspect" "c81fcad685806b4efe65f25e15539cca94ab0403d319f7f93adb1dbfffd102ac"`
[INFO] running `"docker" "rm" "-f" "c81fcad685806b4efe65f25e15539cca94ab0403d319f7f93adb1dbfffd102ac"`
[INFO] [stdout] c81fcad685806b4efe65f25e15539cca94ab0403d319f7f93adb1dbfffd102ac
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/remychantenay/rust-microgrep:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] c179d7576459e1ec421b1967480d5b2a5f8bfa3cf962c03e74f2768d3296544a
[INFO] running `"docker" "start" "-a" "c179d7576459e1ec421b1967480d5b2a5f8bfa3cf962c03e74f2768d3296544a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/microgrep-fd67d0a6c265513f
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test search::tests::search_one_result ... ok
[INFO] [stderr]      Running /opt/crater/target/debug/deps/microgrep-fe2494d25488f444
[INFO] [stdout] test search::tests::search_no_result ... ok
[INFO] [stdout] test search::tests::search_insensitive ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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] [stderr]    Doc-tests microgrep
[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" "c179d7576459e1ec421b1967480d5b2a5f8bfa3cf962c03e74f2768d3296544a"`
[INFO] running `"docker" "rm" "-f" "c179d7576459e1ec421b1967480d5b2a5f8bfa3cf962c03e74f2768d3296544a"`
[INFO] [stdout] c179d7576459e1ec421b1967480d5b2a5f8bfa3cf962c03e74f2768d3296544a