[INFO] updating cached repository volks73/groom
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/volks73/groom
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/volks73/groom" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/volks73/groom"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/volks73/groom'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/volks73/groom" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/volks73/groom"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/volks73/groom'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f495906323a9804f4d37e06abb43745c3b0547d3
[INFO] sha for GitHub repo volks73/groom: f495906323a9804f4d37e06abb43745c3b0547d3
[INFO] validating manifest of volks73/groom on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of volks73/groom on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing volks73/groom
[INFO] finished frobbing volks73/groom
[INFO] frobbed toml for volks73/groom written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/volks73/groom/Cargo.toml
[INFO] started frobbing volks73/groom
[INFO] finished frobbing volks73/groom
[INFO] frobbed toml for volks73/groom written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/volks73/groom/Cargo.toml
[INFO] crate volks73/groom already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking volks73/groom against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-4/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/volks73/groom:/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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c976553c2aa080106704a18c7f689a00ce0c1988568520c3299de4b7cc50954e
[INFO] running `"docker" "start" "-a" "c976553c2aa080106704a18c7f689a00ce0c1988568520c3299de4b7cc50954e"`
[INFO] [stderr]     Checking num-traits v0.2.0
[INFO] [stderr]    Compiling Groom v0.1.1 (/opt/crater/workdir)
[INFO] [stderr]     Checking atty v0.2.6
[INFO] [stderr]     Checking mustache v0.9.0
[INFO] [stderr]     Checking loggerv v0.6.0
[INFO] [stderr]     Checking clap v2.29.4
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking serde_yaml v0.7.3
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/groom.rs:75:36
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let mut output_writer: Box<Write> = if let Some(output) = self.output {
[INFO] [stderr]    |                                    ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:147:32
[INFO] [stderr]     |
[INFO] [stderr] 147 |     fn cause(&self) -> Option<&StdError> {
[INFO] [stderr]     |                                ^^^^^^^^ help: use `dyn`: `dyn StdError`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/groom.rs:75:36
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let mut output_writer: Box<Write> = if let Some(output) = self.output {
[INFO] [stderr]    |                                    ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:147:32
[INFO] [stderr]     |
[INFO] [stderr] 147 |     fn cause(&self) -> Option<&StdError> {
[INFO] [stderr]     |                                ^^^^^^^^ help: use `dyn`: `dyn StdError`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.79s
[INFO] running `"docker" "inspect" "c976553c2aa080106704a18c7f689a00ce0c1988568520c3299de4b7cc50954e"`
[INFO] running `"docker" "rm" "-f" "c976553c2aa080106704a18c7f689a00ce0c1988568520c3299de4b7cc50954e"`
[INFO] [stdout] c976553c2aa080106704a18c7f689a00ce0c1988568520c3299de4b7cc50954e