[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/beta-1.37-6/sources/1.36.0/gh/dbasedow/imgdiff"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/dbasedow/imgdiff'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dbasedow/imgdiff" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dbasedow/imgdiff"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dbasedow/imgdiff on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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/beta-1.37-6/sources/1.36.0/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/beta-1.37-6/sources/beta-2019-07-23/gh/dbasedow/imgdiff/Cargo.toml
[INFO] crate dbasedow/imgdiff already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing dbasedow/imgdiff against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dbasedow/imgdiff:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 1c1037665db83ae7a79dca14942fb746ceaec5ac68a7b9304e4926cf68087b0b
[INFO] running `"docker" "start" "-a" "1c1037665db83ae7a79dca14942fb746ceaec5ac68a7b9304e4926cf68087b0b"`
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling jpeg-decoder v0.1.14
[INFO] [stderr]    Compiling image v0.18.0
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 23.97s
[INFO] running `"docker" "inspect" "1c1037665db83ae7a79dca14942fb746ceaec5ac68a7b9304e4926cf68087b0b"`
[INFO] running `"docker" "rm" "-f" "1c1037665db83ae7a79dca14942fb746ceaec5ac68a7b9304e4926cf68087b0b"`
[INFO] [stdout] 1c1037665db83ae7a79dca14942fb746ceaec5ac68a7b9304e4926cf68087b0b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dbasedow/imgdiff:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1bafc5ea2fdc37e8e0acc1698e2328b843f238301fcfa9f1c61be11596df116f
[INFO] running `"docker" "start" "-a" "1bafc5ea2fdc37e8e0acc1698e2328b843f238301fcfa9f1c61be11596df116f"`
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `"docker" "inspect" "1bafc5ea2fdc37e8e0acc1698e2328b843f238301fcfa9f1c61be11596df116f"`
[INFO] running `"docker" "rm" "-f" "1bafc5ea2fdc37e8e0acc1698e2328b843f238301fcfa9f1c61be11596df116f"`
[INFO] [stdout] 1bafc5ea2fdc37e8e0acc1698e2328b843f238301fcfa9f1c61be11596df116f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dbasedow/imgdiff:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 9a794499e99a3e0a6e5c3c3c6f21e0738b9f77922b6627cc36905ef7b4dd8aeb
[INFO] running `"docker" "start" "-a" "9a794499e99a3e0a6e5c3c3c6f21e0738b9f77922b6627cc36905ef7b4dd8aeb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/imgdiff-de4bc200d88a39c8
[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" "9a794499e99a3e0a6e5c3c3c6f21e0738b9f77922b6627cc36905ef7b4dd8aeb"`
[INFO] running `"docker" "rm" "-f" "9a794499e99a3e0a6e5c3c3c6f21e0738b9f77922b6627cc36905ef7b4dd8aeb"`
[INFO] [stdout] 9a794499e99a3e0a6e5c3c3c6f21e0738b9f77922b6627cc36905ef7b4dd8aeb