[INFO] updating cached repository cmounce/plasma
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cmounce/plasma
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cmounce/plasma" "work/ex/beta-1.38-1/sources/1.37.0/gh/cmounce/plasma"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cmounce/plasma'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cmounce/plasma" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cmounce/plasma"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cmounce/plasma'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5fbec1f4c587507161e7f51559ec806be5f4b891
[INFO] sha for GitHub repo cmounce/plasma: 5fbec1f4c587507161e7f51559ec806be5f4b891
[INFO] validating manifest of cmounce/plasma 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 cmounce/plasma 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 cmounce/plasma
[INFO] finished frobbing cmounce/plasma
[INFO] frobbed toml for cmounce/plasma written to work/ex/beta-1.38-1/sources/1.37.0/gh/cmounce/plasma/Cargo.toml
[INFO] started frobbing cmounce/plasma
[INFO] finished frobbing cmounce/plasma
[INFO] frobbed toml for cmounce/plasma written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cmounce/plasma/Cargo.toml
[INFO] crate cmounce/plasma already has a lockfile, it will not be regenerated
[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 cmounce/plasma against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cmounce/plasma:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] bf4d1f5be7610f810f8a536a66cebaed53ba3116d24c8f79bed46bc72b52213f
[INFO] running `"docker" "start" "-a" "bf4d1f5be7610f810f8a536a66cebaed53ba3116d24c8f79bed46bc72b52213f"`
[INFO] [stderr]    Compiling sdl2-sys v0.30.0
[INFO] [stderr]    Compiling ordered-float v0.5.0
[INFO] [stderr]    Compiling cgmath v0.14.1
[INFO] [stderr]    Compiling num v0.1.37
[INFO] [stderr]    Compiling sdl2 v0.30.0
[INFO] [stderr]    Compiling plasma v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/fastmath.rs:58:1
[INFO] [stderr]    |
[INFO] [stderr] 58 | / macro_rules! assert_feq {
[INFO] [stderr] 59 | |     ($a:expr, $b:expr) => (
[INFO] [stderr] 60 | |         {
[INFO] [stderr] 61 | |             let a:f32 = $a;
[INFO] [stderr] ...  |
[INFO] [stderr] 65 | |     );
[INFO] [stderr] 66 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'clamp'
[INFO] [stderr]   --> src/color/colormapper.rs:17:28
[INFO] [stderr]    |
[INFO] [stderr] 17 |         let s = saturation.clamp(0.0, 1.0);
[INFO] [stderr]    |                            ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/44095
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'clamp'
[INFO] [stderr]   --> src/color/colormapper.rs:18:27
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let l = lightness.clamp(0.0, 1.0);
[INFO] [stderr]    |                           ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/44095
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'clamp'
[INFO] [stderr]   --> src/color/colormapper.rs:55:42
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let x = (-1.0).lerp(1.0, color_x.clamp(0.0, 1.0));
[INFO] [stderr]    |                                          ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/44095
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'clamp'
[INFO] [stderr]   --> src/color/colormapper.rs:56:42
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let y = (-1.0).lerp(1.0, color_y.clamp(0.0, 1.0));
[INFO] [stderr]    |                                          ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/44095
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `plasma`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "bf4d1f5be7610f810f8a536a66cebaed53ba3116d24c8f79bed46bc72b52213f"`
[INFO] running `"docker" "rm" "-f" "bf4d1f5be7610f810f8a536a66cebaed53ba3116d24c8f79bed46bc72b52213f"`
[INFO] [stdout] bf4d1f5be7610f810f8a536a66cebaed53ba3116d24c8f79bed46bc72b52213f