[INFO] updating cached repository dbasedow/imgdiff
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dbasedow/imgdiff
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dbasedow/imgdiff" "work/ex/pr-59527/sources/master#003382e4150984cb476047b3925edf8d75df2d59/gh/dbasedow/imgdiff"`
[INFO] [stderr] Cloning into 'work/ex/pr-59527/sources/master#003382e4150984cb476047b3925edf8d75df2d59/gh/dbasedow/imgdiff'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dbasedow/imgdiff" "work/ex/pr-59527/sources/try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00/gh/dbasedow/imgdiff"`
[INFO] [stderr] Cloning into 'work/ex/pr-59527/sources/try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00/gh/dbasedow/imgdiff'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5b4b6181c00bee72fd6d6451beb764ffa181f703
[INFO] sha for GitHub repo dbasedow/imgdiff: 5b4b6181c00bee72fd6d6451beb764ffa181f703
[INFO] validating manifest of dbasedow/imgdiff on toolchain master#003382e4150984cb476047b3925edf8d75df2d59
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+003382e4150984cb476047b3925edf8d75df2d59-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dbasedow/imgdiff on toolchain try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+47f4f94676fbdd494dd2c2dc9ac377a13fc78e00-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dbasedow/imgdiff
[INFO] finished frobbing dbasedow/imgdiff
[INFO] frobbed toml for dbasedow/imgdiff written to work/ex/pr-59527/sources/master#003382e4150984cb476047b3925edf8d75df2d59/gh/dbasedow/imgdiff/Cargo.toml
[INFO] started frobbing dbasedow/imgdiff
[INFO] finished frobbing dbasedow/imgdiff
[INFO] frobbed toml for dbasedow/imgdiff written to work/ex/pr-59527/sources/try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00/gh/dbasedow/imgdiff/Cargo.toml
[INFO] crate dbasedow/imgdiff already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+003382e4150984cb476047b3925edf8d75df2d59-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+47f4f94676fbdd494dd2c2dc9ac377a13fc78e00-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking dbasedow/imgdiff against try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00 for pr-59527
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59527/worker-4/try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59527/sources/try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00/gh/dbasedow/imgdiff:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+47f4f94676fbdd494dd2c2dc9ac377a13fc78e00-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cdb51a25b5da0cc48b6fd92728438dd715b37fae68461d90d4cce6f07a2698a8
[INFO] running `"docker" "start" "-a" "cdb51a25b5da0cc48b6fd92728438dd715b37fae68461d90d4cce6f07a2698a8"`
[INFO] [stderr]     Checking imgdiff v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `left`
[INFO] [stderr]   --> src/main.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn diff_bw(left: &[u8], right: &[u8]) -> u8 {
[INFO] [stderr]    |            ^^^^ help: consider prefixing with an underscore: `_left`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right`
[INFO] [stderr]   --> src/main.rs:20:25
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn diff_bw(left: &[u8], right: &[u8]) -> u8 {
[INFO] [stderr]    |                         ^^^^^ help: consider prefixing with an underscore: `_right`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `diff_bw`
[INFO] [stderr]   --> src/main.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn diff_bw(left: &[u8], right: &[u8]) -> u8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left`
[INFO] [stderr]   --> src/main.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn diff_bw(left: &[u8], right: &[u8]) -> u8 {
[INFO] [stderr]    |            ^^^^ help: consider prefixing with an underscore: `_left`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right`
[INFO] [stderr]   --> src/main.rs:20:25
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn diff_bw(left: &[u8], right: &[u8]) -> u8 {
[INFO] [stderr]    |                         ^^^^^ help: consider prefixing with an underscore: `_right`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `diff_bw`
[INFO] [stderr]   --> src/main.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn diff_bw(left: &[u8], right: &[u8]) -> u8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `"docker" "inspect" "cdb51a25b5da0cc48b6fd92728438dd715b37fae68461d90d4cce6f07a2698a8"`
[INFO] running `"docker" "rm" "-f" "cdb51a25b5da0cc48b6fd92728438dd715b37fae68461d90d4cce6f07a2698a8"`
[INFO] [stdout] cdb51a25b5da0cc48b6fd92728438dd715b37fae68461d90d4cce6f07a2698a8