[INFO] updating cached repository nicrgren/rsplacer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nicrgren/rsplacer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nicrgren/rsplacer" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/nicrgren/rsplacer"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/nicrgren/rsplacer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nicrgren/rsplacer" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/nicrgren/rsplacer"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/nicrgren/rsplacer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b05baf5cdba6d29175523f5fe43951aa7c812a93
[INFO] sha for GitHub repo nicrgren/rsplacer: b05baf5cdba6d29175523f5fe43951aa7c812a93
[INFO] validating manifest of nicrgren/rsplacer on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nicrgren/rsplacer on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nicrgren/rsplacer
[INFO] finished frobbing nicrgren/rsplacer
[INFO] frobbed toml for nicrgren/rsplacer written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/nicrgren/rsplacer/Cargo.toml
[INFO] started frobbing nicrgren/rsplacer
[INFO] finished frobbing nicrgren/rsplacer
[INFO] frobbed toml for nicrgren/rsplacer written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/nicrgren/rsplacer/Cargo.toml
[INFO] crate nicrgren/rsplacer already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking nicrgren/rsplacer against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-7/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/nicrgren/rsplacer:/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=forbid" "-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" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d478795a85b95aafe6719de39c53e8f1818dfba4b9fabc1e950d7bd58cc6efe4
[INFO] running `"docker" "start" "-a" "d478795a85b95aafe6719de39c53e8f1818dfba4b9fabc1e950d7bd58cc6efe4"`
[INFO] [stderr]     Checking regex v0.2.3
[INFO] [stderr]     Checking structopt v0.1.6
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking rsplacer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variant is never constructed: `ToFile`
[INFO] [stderr]  --> src/output.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     ToFile(fs::File),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_file`
[INFO] [stderr]   --> src/output.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | /     pub fn to_file<T: AsRef<str>>(file_path: T)
[INFO] [stderr] 19 | |                                   -> Result<Output, Error> {
[INFO] [stderr] 20 | |         let file = fs::File::open(file_path.as_ref())?;
[INFO] [stderr] 21 | |
[INFO] [stderr] 22 | |         Ok(Output::ToFile(file))
[INFO] [stderr] 23 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_replacer_from_arg_str`
[INFO] [stderr]    --> src/replacer.rs:212:5
[INFO] [stderr]     |
[INFO] [stderr] 212 |     fn test_replacer_from_arg_str() {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ToFile`
[INFO] [stderr]  --> src/output.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     ToFile(fs::File),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_file`
[INFO] [stderr]   --> src/output.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | /     pub fn to_file<T: AsRef<str>>(file_path: T)
[INFO] [stderr] 19 | |                                   -> Result<Output, Error> {
[INFO] [stderr] 20 | |         let file = fs::File::open(file_path.as_ref())?;
[INFO] [stderr] 21 | |
[INFO] [stderr] 22 | |         Ok(Output::ToFile(file))
[INFO] [stderr] 23 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.47s
[INFO] running `"docker" "inspect" "d478795a85b95aafe6719de39c53e8f1818dfba4b9fabc1e950d7bd58cc6efe4"`
[INFO] running `"docker" "rm" "-f" "d478795a85b95aafe6719de39c53e8f1818dfba4b9fabc1e950d7bd58cc6efe4"`
[INFO] [stdout] d478795a85b95aafe6719de39c53e8f1818dfba4b9fabc1e950d7bd58cc6efe4