[INFO] crate image_buffer 0.2.0 is already in cache
[INFO] extracting crate image_buffer 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/image_buffer/0.2.0
[INFO] extracting crate image_buffer 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/image_buffer/0.2.0
[INFO] validating manifest of image_buffer-0.2.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of image_buffer-0.2.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing image_buffer-0.2.0
[INFO] finished frobbing image_buffer-0.2.0
[INFO] frobbed toml for image_buffer-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/image_buffer/0.2.0/Cargo.toml
[INFO] started frobbing image_buffer-0.2.0
[INFO] finished frobbing image_buffer-0.2.0
[INFO] frobbed toml for image_buffer-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/image_buffer/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing image_buffer-0.2.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/image_buffer/0.2.0:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 57799a87766fc1317f32750acfac2744d84292a3a6e5ff0f45ba8e39ad504f64
[INFO] running `"docker" "start" "-a" "57799a87766fc1317f32750acfac2744d84292a3a6e5ff0f45ba8e39ad504f64"`
[INFO] [stderr]    Compiling image_buffer v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/buffer.rs:396:14
[INFO] [stderr]     |
[INFO] [stderr] 396 |         for (mut to, from) in buffer.pixels_mut().zip(self.pixels()) {
[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 1.91s
[INFO] running `"docker" "inspect" "57799a87766fc1317f32750acfac2744d84292a3a6e5ff0f45ba8e39ad504f64"`
[INFO] running `"docker" "rm" "-f" "57799a87766fc1317f32750acfac2744d84292a3a6e5ff0f45ba8e39ad504f64"`
[INFO] [stdout] 57799a87766fc1317f32750acfac2744d84292a3a6e5ff0f45ba8e39ad504f64
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/image_buffer/0.2.0:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 29fe53978f7d591c8f49ddfe2601bceae84278b98cfc346e0b9eca4616701696
[INFO] running `"docker" "start" "-a" "29fe53978f7d591c8f49ddfe2601bceae84278b98cfc346e0b9eca4616701696"`
[INFO] [stderr]    Compiling image_buffer v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/buffer.rs:396:14
[INFO] [stderr]     |
[INFO] [stderr] 396 |         for (mut to, from) in buffer.pixels_mut().zip(self.pixels()) {
[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/buffer.rs:452:13
[INFO] [stderr]     |
[INFO] [stderr] 452 |         for mut p in a.pixels_mut() {
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.10s
[INFO] running `"docker" "inspect" "29fe53978f7d591c8f49ddfe2601bceae84278b98cfc346e0b9eca4616701696"`
[INFO] running `"docker" "rm" "-f" "29fe53978f7d591c8f49ddfe2601bceae84278b98cfc346e0b9eca4616701696"`
[INFO] [stdout] 29fe53978f7d591c8f49ddfe2601bceae84278b98cfc346e0b9eca4616701696
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/image_buffer/0.2.0:/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 4d7cdc19517e69c3f3b15b2834de94c1e1bbdd7d2cf478b9f1c7f0da16e3bf52
[INFO] running `"docker" "start" "-a" "4d7cdc19517e69c3f3b15b2834de94c1e1bbdd7d2cf478b9f1c7f0da16e3bf52"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/image_buffer-02a6268677005a30
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test buffer::test::test_mut_iter ... ok
[INFO] [stdout] test buffer::test::slice_buffer ... ok
[INFO] [stdout] test buffer::test::test_get_pixel ... ok
[INFO] [stdout] test color_model::rgb::tests::test_rgb_conversions ... ok
[INFO] [stdout] test color_model::rgb::tests::test_rescale ... ok
[INFO] [stdout] test color_model::test_add ... ok
[INFO] [stdout] test buffer::test::test_conversion ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests image_buffer
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/buffer.rs - buffer::ImageBuffer<FromColor, Container>::convert_buffer (line 386) ... ok
[INFO] [stdout] test src/lib.rs -  (line 13) ... ok
[INFO] [stdout] test src/lib.rs -  (line 22) ... ok
[INFO] [stdout] test src/buffer.rs - buffer::ImageBuffer<P, Container>::enumerate_pixels (line 196) ... ok
[INFO] [stdout] test src/lib.rs -  (line 36) ... ok
[INFO] [stdout] test src/buffer.rs - buffer::ImageBuffer<P, Container>::pixels_mut (line 235) ... ok
[INFO] [stdout] test src/buffer.rs - buffer::ImageBuffer<P, Container>::pixels (line 177) ... ok
[INFO] [stdout] test src/buffer.rs - buffer::ImageBuffer<P, Container>::enumerate_pixels_mut (line 250) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "4d7cdc19517e69c3f3b15b2834de94c1e1bbdd7d2cf478b9f1c7f0da16e3bf52"`
[INFO] running `"docker" "rm" "-f" "4d7cdc19517e69c3f3b15b2834de94c1e1bbdd7d2cf478b9f1c7f0da16e3bf52"`
[INFO] [stdout] 4d7cdc19517e69c3f3b15b2834de94c1e1bbdd7d2cf478b9f1c7f0da16e3bf52