[INFO] updating cached repository tengwar/file-dedup
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tengwar/file-dedup
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tengwar/file-dedup" "work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/tengwar/file-dedup"`
[INFO] [stderr] Cloning into 'work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/tengwar/file-dedup'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tengwar/file-dedup" "work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/tengwar/file-dedup"`
[INFO] [stderr] Cloning into 'work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/tengwar/file-dedup'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e0090ab52e14d029e009cae52bfde07bb3074874
[INFO] sha for GitHub repo tengwar/file-dedup: e0090ab52e14d029e009cae52bfde07bb3074874
[INFO] validating manifest of tengwar/file-dedup on toolchain master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tengwar/file-dedup on toolchain try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+af22dfc7f56a5057c6b6120a65c74e7b6c1530af-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tengwar/file-dedup
[INFO] finished frobbing tengwar/file-dedup
[INFO] frobbed toml for tengwar/file-dedup written to work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/tengwar/file-dedup/Cargo.toml
[INFO] started frobbing tengwar/file-dedup
[INFO] finished frobbing tengwar/file-dedup
[INFO] frobbed toml for tengwar/file-dedup written to work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/tengwar/file-dedup/Cargo.toml
[INFO] crate tengwar/file-dedup already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+af22dfc7f56a5057c6b6120a65c74e7b6c1530af-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking tengwar/file-dedup against try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af for pr-61753
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61753/worker-3/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/tengwar/file-dedup:/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" "+af22dfc7f56a5057c6b6120a65c74e7b6c1530af-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2785c732c1672a65e24b662250c171669280da2afe1baa0d6a454408d75472e3
[INFO] running `"docker" "start" "-a" "2785c732c1672a65e24b662250c171669280da2afe1baa0d6a454408d75472e3"`
[INFO] [stderr]    Compiling gcc v0.3.50
[INFO] [stderr]     Checking multimap v0.3.0
[INFO] [stderr]     Checking term_size v0.3.0
[INFO] [stderr]     Checking clap v2.24.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.11
[INFO] [stderr]     Checking backtrace v0.3.2
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking image-dedup v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/helper.rs:8:45
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn visit_dirs(dir: &Path, command: &mut FnMut(&DirEntry) -> Result<()>) -> Result<()> {
[INFO] [stderr]   |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&DirEntry) -> Result<()>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/helper.rs:8:45
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn visit_dirs(dir: &Path, command: &mut FnMut(&DirEntry) -> Result<()>) -> Result<()> {
[INFO] [stderr]   |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&DirEntry) -> Result<()>`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:93:8
[INFO] [stderr]    |
[INFO] [stderr] 93 |             let mut some_dupes = &mut helper::find_duplicates(paths) // TODO: use human-readable sizes below.
[INFO] [stderr]    |                 ----^^^^^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:93:8
[INFO] [stderr]    |
[INFO] [stderr] 93 |             let mut some_dupes = &mut helper::find_duplicates(paths) // TODO: use human-readable sizes below.
[INFO] [stderr]    |                 ----^^^^^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.56s
[INFO] running `"docker" "inspect" "2785c732c1672a65e24b662250c171669280da2afe1baa0d6a454408d75472e3"`
[INFO] running `"docker" "rm" "-f" "2785c732c1672a65e24b662250c171669280da2afe1baa0d6a454408d75472e3"`
[INFO] [stdout] 2785c732c1672a65e24b662250c171669280da2afe1baa0d6a454408d75472e3