[INFO] updating cached repository zsiegel/rustgrep
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/zsiegel/rustgrep
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/zsiegel/rustgrep" "work/ex/beta-1.38-1/sources/1.37.0/gh/zsiegel/rustgrep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/zsiegel/rustgrep'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/zsiegel/rustgrep" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zsiegel/rustgrep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zsiegel/rustgrep'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fbcc0642347c1d92a3d2b449e59ebc7d358721c4
[INFO] sha for GitHub repo zsiegel/rustgrep: fbcc0642347c1d92a3d2b449e59ebc7d358721c4
[INFO] validating manifest of zsiegel/rustgrep 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 zsiegel/rustgrep 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 zsiegel/rustgrep
[INFO] finished frobbing zsiegel/rustgrep
[INFO] frobbed toml for zsiegel/rustgrep written to work/ex/beta-1.38-1/sources/1.37.0/gh/zsiegel/rustgrep/Cargo.toml
[INFO] started frobbing zsiegel/rustgrep
[INFO] finished frobbing zsiegel/rustgrep
[INFO] frobbed toml for zsiegel/rustgrep written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zsiegel/rustgrep/Cargo.toml
[INFO] crate zsiegel/rustgrep 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 zsiegel/rustgrep 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/zsiegel/rustgrep:/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] 1c08086ddc848b60643e365640fa416020ecd0b25aa5ea108dfb232f71a408a9
[INFO] running `"docker" "start" "-a" "1c08086ddc848b60643e365640fa416020ecd0b25aa5ea108dfb232f71a408a9"`
[INFO] [stderr]    Compiling rustgrep v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:36:46
[INFO] [stderr]    |
[INFO] [stderr] 36 | pub fn run(config: Config) -> Result<(), 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: use of deprecated item 'core::str::<impl str>::trim_left': superseded by `trim_start`
[INFO] [stderr]   --> src/lib.rs:63:47
[INFO] [stderr]    |
[INFO] [stderr] 63 |                             contents: content.trim_left().to_string(),
[INFO] [stderr]    |                                               ^^^^^^^^^ help: replace the use of the deprecated item: `trim_start`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `"docker" "inspect" "1c08086ddc848b60643e365640fa416020ecd0b25aa5ea108dfb232f71a408a9"`
[INFO] running `"docker" "rm" "-f" "1c08086ddc848b60643e365640fa416020ecd0b25aa5ea108dfb232f71a408a9"`
[INFO] [stdout] 1c08086ddc848b60643e365640fa416020ecd0b25aa5ea108dfb232f71a408a9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/zsiegel/rustgrep:/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] b0b20ff4da0361de20f9d179c451e8f07e1c14410f2d500df0eacd3d7faea4b8
[INFO] running `"docker" "start" "-a" "b0b20ff4da0361de20f9d179c451e8f07e1c14410f2d500df0eacd3d7faea4b8"`
[INFO] [stderr]    Compiling rustgrep v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:36:46
[INFO] [stderr]    |
[INFO] [stderr] 36 | pub fn run(config: Config) -> Result<(), 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: use of deprecated item 'core::str::<impl str>::trim_left': superseded by `trim_start`
[INFO] [stderr]   --> src/lib.rs:63:47
[INFO] [stderr]    |
[INFO] [stderr] 63 |                             contents: content.trim_left().to_string(),
[INFO] [stderr]    |                                               ^^^^^^^^^ help: replace the use of the deprecated item: `trim_start`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/lib.rs:88:27
[INFO] [stderr]    |
[INFO] [stderr] 88 |             search(query, contents)
[INFO] [stderr]    |                           ^^^^^^^^ types differ in mutability
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&mut std::io::BufReader<std::fs::File>`
[INFO] [stderr]               found type `&str`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `rustgrep`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "b0b20ff4da0361de20f9d179c451e8f07e1c14410f2d500df0eacd3d7faea4b8"`
[INFO] running `"docker" "rm" "-f" "b0b20ff4da0361de20f9d179c451e8f07e1c14410f2d500df0eacd3d7faea4b8"`
[INFO] [stdout] b0b20ff4da0361de20f9d179c451e8f07e1c14410f2d500df0eacd3d7faea4b8