[INFO] updating cached repository basile-henry/dither
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/basile-henry/dither
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/basile-henry/dither" "work/ex/beta-1.37-6/sources/1.36.0/gh/basile-henry/dither"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/basile-henry/dither'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/basile-henry/dither" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/basile-henry/dither"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/basile-henry/dither'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 165ef0ba67db837b3926a7f8ebb6ef017f4297a3
[INFO] sha for GitHub repo basile-henry/dither: 165ef0ba67db837b3926a7f8ebb6ef017f4297a3
[INFO] validating manifest of basile-henry/dither 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 basile-henry/dither 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 basile-henry/dither
[INFO] finished frobbing basile-henry/dither
[INFO] frobbed toml for basile-henry/dither written to work/ex/beta-1.37-6/sources/1.36.0/gh/basile-henry/dither/Cargo.toml
[INFO] started frobbing basile-henry/dither
[INFO] finished frobbing basile-henry/dither
[INFO] frobbed toml for basile-henry/dither written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/basile-henry/dither/Cargo.toml
[INFO] crate basile-henry/dither 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 basile-henry/dither against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/basile-henry/dither:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] bc87bd387716608e9489ccc740ed216cb3d898e833b23571c034e7c946e8e05c
[INFO] running `"docker" "start" "-a" "bc87bd387716608e9489ccc740ed216cb3d898e833b23571c034e7c946e8e05c"`
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]    Compiling num-derive v0.2.4
[INFO] [stderr]    Compiling tiff v0.2.2
[INFO] [stderr]    Compiling image v0.21.0
[INFO] [stderr]    Compiling dither v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: cannot borrow `*to` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/main.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let [rt, gt, bt] = &to.data;
[INFO] [stderr]    |                        -------- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 42 |     to.clone_from(&Rgb([add_err(rt, re), add_err(gt, ge), add_err(bt, be)]));
[INFO] [stderr]    |     ^^                          -- immutable borrow later used here
[INFO] [stderr]    |     |
[INFO] [stderr]    |     mutable borrow occurs here
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(mutable_borrow_reservation_conflict)] on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.23s
[INFO] running `"docker" "inspect" "bc87bd387716608e9489ccc740ed216cb3d898e833b23571c034e7c946e8e05c"`
[INFO] running `"docker" "rm" "-f" "bc87bd387716608e9489ccc740ed216cb3d898e833b23571c034e7c946e8e05c"`
[INFO] [stdout] bc87bd387716608e9489ccc740ed216cb3d898e833b23571c034e7c946e8e05c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/basile-henry/dither:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 150e63793b1b96e81b6c36e6465bdc5d11f9fbad50daa911ec45701dde4948df
[INFO] running `"docker" "start" "-a" "150e63793b1b96e81b6c36e6465bdc5d11f9fbad50daa911ec45701dde4948df"`
[INFO] [stderr]    Compiling dither v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: cannot borrow `*to` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/main.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let [rt, gt, bt] = &to.data;
[INFO] [stderr]    |                        -------- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 42 |     to.clone_from(&Rgb([add_err(rt, re), add_err(gt, ge), add_err(bt, be)]));
[INFO] [stderr]    |     ^^                          -- immutable borrow later used here
[INFO] [stderr]    |     |
[INFO] [stderr]    |     mutable borrow occurs here
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(mutable_borrow_reservation_conflict)] on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `"docker" "inspect" "150e63793b1b96e81b6c36e6465bdc5d11f9fbad50daa911ec45701dde4948df"`
[INFO] running `"docker" "rm" "-f" "150e63793b1b96e81b6c36e6465bdc5d11f9fbad50daa911ec45701dde4948df"`
[INFO] [stdout] 150e63793b1b96e81b6c36e6465bdc5d11f9fbad50daa911ec45701dde4948df
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/basile-henry/dither:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 0aa4c316bb6baeaada7086eb52b2d34152ced7934265ed81c4f846bd00ce04f8
[INFO] running `"docker" "start" "-a" "0aa4c316bb6baeaada7086eb52b2d34152ced7934265ed81c4f846bd00ce04f8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/dither-74397ac8b25dab43
[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" "0aa4c316bb6baeaada7086eb52b2d34152ced7934265ed81c4f846bd00ce04f8"`
[INFO] running `"docker" "rm" "-f" "0aa4c316bb6baeaada7086eb52b2d34152ced7934265ed81c4f846bd00ce04f8"`
[INFO] [stdout] 0aa4c316bb6baeaada7086eb52b2d34152ced7934265ed81c4f846bd00ce04f8