[INFO] cloning repository https://github.com/basile-henry/dither
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/basile-henry/dither" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbasile-henry%2Fdither", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbasile-henry%2Fdither'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 165ef0ba67db837b3926a7f8ebb6ef017f4297a3
[INFO] testing basile-henry/dither against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbasile-henry%2Fdither" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/basile-henry/dither on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/basile-henry/dither
[INFO] finished tweaking git repo https://github.com/basile-henry/dither
[INFO] tweaked toml for git repo https://github.com/basile-henry/dither written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/basile-henry/dither already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 93660d92c20bf588cd6d36f49ff22974a461f7745e2d7fdc8c199854d2ea1ae2
[INFO] running `Command { std: "docker" "start" "-a" "93660d92c20bf588cd6d36f49ff22974a461f7745e2d7fdc8c199854d2ea1ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "93660d92c20bf588cd6d36f49ff22974a461f7745e2d7fdc8c199854d2ea1ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93660d92c20bf588cd6d36f49ff22974a461f7745e2d7fdc8c199854d2ea1ae2", kill_on_drop: false }`
[INFO] [stdout] 93660d92c20bf588cd6d36f49ff22974a461f7745e2d7fdc8c199854d2ea1ae2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31b52ddd8679aa8dc30e082de8b1913bb357681dcb895e682df5dcf233f20383
[INFO] running `Command { std: "docker" "start" "-a" "31b52ddd8679aa8dc30e082de8b1913bb357681dcb895e682df5dcf233f20383", kill_on_drop: false }`
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]    Compiling adler32 v1.0.3
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]    Compiling deflate v0.7.19
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling png v0.14.0
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[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/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `*to` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/main.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let [rt, gt, bt] = &to.data;
[INFO] [stdout]    |                        -------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 42 |     to.clone_from(&Rgb([add_err(rt, re), add_err(gt, ge), add_err(bt, be)]));
[INFO] [stdout]    |     ^^                          -- immutable borrow later used here
[INFO] [stdout]    |     |
[INFO] [stdout]    |     mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.75s
[INFO] running `Command { std: "docker" "inspect" "31b52ddd8679aa8dc30e082de8b1913bb357681dcb895e682df5dcf233f20383", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31b52ddd8679aa8dc30e082de8b1913bb357681dcb895e682df5dcf233f20383", kill_on_drop: false }`
[INFO] [stdout] 31b52ddd8679aa8dc30e082de8b1913bb357681dcb895e682df5dcf233f20383
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8efbcf82d67258a73e819616321326f85effb3f88d6699ad1e843673501a706c
[INFO] running `Command { std: "docker" "start" "-a" "8efbcf82d67258a73e819616321326f85effb3f88d6699ad1e843673501a706c", kill_on_drop: false }`
[INFO] [stderr]    Compiling dither v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `*to` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/main.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let [rt, gt, bt] = &to.data;
[INFO] [stdout]    |                        -------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 42 |     to.clone_from(&Rgb([add_err(rt, re), add_err(gt, ge), add_err(bt, be)]));
[INFO] [stdout]    |     ^^                          -- immutable borrow later used here
[INFO] [stdout]    |     |
[INFO] [stdout]    |     mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `Command { std: "docker" "inspect" "8efbcf82d67258a73e819616321326f85effb3f88d6699ad1e843673501a706c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8efbcf82d67258a73e819616321326f85effb3f88d6699ad1e843673501a706c", kill_on_drop: false }`
[INFO] [stdout] 8efbcf82d67258a73e819616321326f85effb3f88d6699ad1e843673501a706c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6454d875d3a10cc520954ae24638224fc23aa1985f7d0f1dffd6c60f46ce7e2f
[INFO] running `Command { std: "docker" "start" "-a" "6454d875d3a10cc520954ae24638224fc23aa1985f7d0f1dffd6c60f46ce7e2f", kill_on_drop: false }`
[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] warning: `dither` (bin "dither" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/dither-c16580760e66b4ca)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6454d875d3a10cc520954ae24638224fc23aa1985f7d0f1dffd6c60f46ce7e2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6454d875d3a10cc520954ae24638224fc23aa1985f7d0f1dffd6c60f46ce7e2f", kill_on_drop: false }`
[INFO] [stdout] 6454d875d3a10cc520954ae24638224fc23aa1985f7d0f1dffd6c60f46ce7e2f