[INFO] updating cached repository fzzzy/rust-grep
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fzzzy/rust-grep
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fzzzy/rust-grep" "work/ex/beta-1.38-1/sources/1.37.0/gh/fzzzy/rust-grep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/fzzzy/rust-grep'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fzzzy/rust-grep" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fzzzy/rust-grep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fzzzy/rust-grep'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e9a4693739beccd8c865f57fe58ad146267fb76c
[INFO] sha for GitHub repo fzzzy/rust-grep: e9a4693739beccd8c865f57fe58ad146267fb76c
[INFO] validating manifest of fzzzy/rust-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 fzzzy/rust-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 fzzzy/rust-grep
[INFO] finished frobbing fzzzy/rust-grep
[INFO] frobbed toml for fzzzy/rust-grep written to work/ex/beta-1.38-1/sources/1.37.0/gh/fzzzy/rust-grep/Cargo.toml
[INFO] started frobbing fzzzy/rust-grep
[INFO] finished frobbing fzzzy/rust-grep
[INFO] frobbed toml for fzzzy/rust-grep written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fzzzy/rust-grep/Cargo.toml
[INFO] crate fzzzy/rust-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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing fzzzy/rust-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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fzzzy/rust-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] 1f310d0c82f5cb8522a07463fb4a97eae44d04bcc5afdaed8726c0524c534cbd
[INFO] running `"docker" "start" "-a" "1f310d0c82f5cb8522a07463fb4a97eae44d04bcc5afdaed8726c0524c534cbd"`
[INFO] [stderr]    Compiling rust-grep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:23:34
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn grep_main() -> 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]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `"docker" "inspect" "1f310d0c82f5cb8522a07463fb4a97eae44d04bcc5afdaed8726c0524c534cbd"`
[INFO] running `"docker" "rm" "-f" "1f310d0c82f5cb8522a07463fb4a97eae44d04bcc5afdaed8726c0524c534cbd"`
[INFO] [stdout] 1f310d0c82f5cb8522a07463fb4a97eae44d04bcc5afdaed8726c0524c534cbd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fzzzy/rust-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] 815ebbdd8736491accb2bd7fc73db33a55184b7cd6e364b75552a6e51e25677f
[INFO] running `"docker" "start" "-a" "815ebbdd8736491accb2bd7fc73db33a55184b7cd6e364b75552a6e51e25677f"`
[INFO] [stderr]    Compiling rust-grep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:23:34
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn grep_main() -> 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]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `"docker" "inspect" "815ebbdd8736491accb2bd7fc73db33a55184b7cd6e364b75552a6e51e25677f"`
[INFO] running `"docker" "rm" "-f" "815ebbdd8736491accb2bd7fc73db33a55184b7cd6e364b75552a6e51e25677f"`
[INFO] [stdout] 815ebbdd8736491accb2bd7fc73db33a55184b7cd6e364b75552a6e51e25677f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fzzzy/rust-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] 1ae7223a64f758c8d887caecc99a677473932ab0e97081617d133269e8a0357e
[INFO] running `"docker" "start" "-a" "1ae7223a64f758c8d887caecc99a677473932ab0e97081617d133269e8a0357e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_grep-24a6205bd315b989
[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" "1ae7223a64f758c8d887caecc99a677473932ab0e97081617d133269e8a0357e"`
[INFO] running `"docker" "rm" "-f" "1ae7223a64f758c8d887caecc99a677473932ab0e97081617d133269e8a0357e"`
[INFO] [stdout] 1ae7223a64f758c8d887caecc99a677473932ab0e97081617d133269e8a0357e