[INFO] updating cached repository davidabernado/based-minigrep
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/davidabernado/based-minigrep
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/davidabernado/based-minigrep" "work/ex/beta-1.38-1/sources/1.37.0/gh/davidabernado/based-minigrep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/davidabernado/based-minigrep'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/davidabernado/based-minigrep" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidabernado/based-minigrep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidabernado/based-minigrep'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7b4e7c0b5be8afcb5c8e03b85bf48dec27bc2411
[INFO] sha for GitHub repo davidabernado/based-minigrep: 7b4e7c0b5be8afcb5c8e03b85bf48dec27bc2411
[INFO] validating manifest of davidabernado/based-minigrep 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 davidabernado/based-minigrep 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 davidabernado/based-minigrep
[INFO] finished frobbing davidabernado/based-minigrep
[INFO] frobbed toml for davidabernado/based-minigrep written to work/ex/beta-1.38-1/sources/1.37.0/gh/davidabernado/based-minigrep/Cargo.toml
[INFO] started frobbing davidabernado/based-minigrep
[INFO] finished frobbing davidabernado/based-minigrep
[INFO] frobbed toml for davidabernado/based-minigrep written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidabernado/based-minigrep/Cargo.toml
[INFO] crate davidabernado/based-minigrep 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 davidabernado/based-minigrep against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidabernado/based-minigrep:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 29c24cac042d598c30f8633f92d935c6e9e16da6fbbe4f4a346c5b3a1e51c56d
[INFO] running `"docker" "start" "-a" "29c24cac042d598c30f8633f92d935c6e9e16da6fbbe4f4a346c5b3a1e51c56d"`
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling based_minigrep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:26:60
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn read_file(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]     Finished dev [unoptimized + debuginfo] target(s) in 8.82s
[INFO] running `"docker" "inspect" "29c24cac042d598c30f8633f92d935c6e9e16da6fbbe4f4a346c5b3a1e51c56d"`
[INFO] running `"docker" "rm" "-f" "29c24cac042d598c30f8633f92d935c6e9e16da6fbbe4f4a346c5b3a1e51c56d"`
[INFO] [stdout] 29c24cac042d598c30f8633f92d935c6e9e16da6fbbe4f4a346c5b3a1e51c56d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidabernado/based-minigrep:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 00d3a18ad0f4745fe912f0427810387c3dcd24d92ca6d621465360caf4f985fb
[INFO] running `"docker" "start" "-a" "00d3a18ad0f4745fe912f0427810387c3dcd24d92ca6d621465360caf4f985fb"`
[INFO] [stderr]    Compiling based_minigrep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:26:60
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn read_file(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] error[E0308]: mismatched types
[INFO] [stderr]   --> tests/test_grep.rs:14:39
[INFO] [stderr]    |
[INFO] [stderr] 14 |             search(&query, &contents, &flag)
[INFO] [stderr]    |                                       ^^^^^ expected enum `based_minigrep::grep::Flag`, found struct `std::string::String`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&based_minigrep::grep::Flag`
[INFO] [stderr]               found type `&std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> tests/test_grep.rs:26:39
[INFO] [stderr]    |
[INFO] [stderr] 26 |             search(&query, &contents, &flag),
[INFO] [stderr]    |                                       ^^^^^ expected enum `based_minigrep::grep::Flag`, found struct `std::string::String`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&based_minigrep::grep::Flag`
[INFO] [stderr]               found type `&std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `based_minigrep`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "00d3a18ad0f4745fe912f0427810387c3dcd24d92ca6d621465360caf4f985fb"`
[INFO] running `"docker" "rm" "-f" "00d3a18ad0f4745fe912f0427810387c3dcd24d92ca6d621465360caf4f985fb"`
[INFO] [stdout] 00d3a18ad0f4745fe912f0427810387c3dcd24d92ca6d621465360caf4f985fb