[INFO] updating cached repository garretttaco/rename
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/garretttaco/rename
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/garretttaco/rename" "work/ex/beta-1.38-1/sources/1.37.0/gh/garretttaco/rename"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/garretttaco/rename'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/garretttaco/rename" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/garretttaco/rename"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/garretttaco/rename'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] edc4917e2dade9af65b3fb96302aeac9a6f98c3c
[INFO] sha for GitHub repo garretttaco/rename: edc4917e2dade9af65b3fb96302aeac9a6f98c3c
[INFO] validating manifest of garretttaco/rename 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 garretttaco/rename 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 garretttaco/rename
[INFO] finished frobbing garretttaco/rename
[INFO] frobbed toml for garretttaco/rename written to work/ex/beta-1.38-1/sources/1.37.0/gh/garretttaco/rename/Cargo.toml
[INFO] started frobbing garretttaco/rename
[INFO] finished frobbing garretttaco/rename
[INFO] frobbed toml for garretttaco/rename written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/garretttaco/rename/Cargo.toml
[INFO] crate garretttaco/rename 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 garretttaco/rename 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/garretttaco/rename:/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] c33d71c895db63b3be1a0da5997544aa207afce6c0f90f68305850bb2402ad81
[INFO] running `"docker" "start" "-a" "c33d71c895db63b3be1a0da5997544aa207afce6c0f90f68305850bb2402ad81"`
[INFO] [stderr]    Compiling clap v2.29.0
[INFO] [stderr]    Compiling rename v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |         fs::rename(&file_name, &updated_name);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.34s
[INFO] running `"docker" "inspect" "c33d71c895db63b3be1a0da5997544aa207afce6c0f90f68305850bb2402ad81"`
[INFO] running `"docker" "rm" "-f" "c33d71c895db63b3be1a0da5997544aa207afce6c0f90f68305850bb2402ad81"`
[INFO] [stdout] c33d71c895db63b3be1a0da5997544aa207afce6c0f90f68305850bb2402ad81
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/garretttaco/rename:/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] faa0cdfe1d72d2374a7e06c192b7d87fbc3f2b143d05fd97063eb681d7e36c60
[INFO] running `"docker" "start" "-a" "faa0cdfe1d72d2374a7e06c192b7d87fbc3f2b143d05fd97063eb681d7e36c60"`
[INFO] [stderr]    Compiling rename v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |         fs::rename(&file_name, &updated_name);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `"docker" "inspect" "faa0cdfe1d72d2374a7e06c192b7d87fbc3f2b143d05fd97063eb681d7e36c60"`
[INFO] running `"docker" "rm" "-f" "faa0cdfe1d72d2374a7e06c192b7d87fbc3f2b143d05fd97063eb681d7e36c60"`
[INFO] [stdout] faa0cdfe1d72d2374a7e06c192b7d87fbc3f2b143d05fd97063eb681d7e36c60
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/garretttaco/rename:/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] ccfe5801ec278adfab49c896602834908cf8ef2feef5ffc7642ecd665b50d9ba
[INFO] running `"docker" "start" "-a" "ccfe5801ec278adfab49c896602834908cf8ef2feef5ffc7642ecd665b50d9ba"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rename-40299d4c80fbecaa
[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" "ccfe5801ec278adfab49c896602834908cf8ef2feef5ffc7642ecd665b50d9ba"`
[INFO] running `"docker" "rm" "-f" "ccfe5801ec278adfab49c896602834908cf8ef2feef5ffc7642ecd665b50d9ba"`
[INFO] [stdout] ccfe5801ec278adfab49c896602834908cf8ef2feef5ffc7642ecd665b50d9ba