[INFO] updating cached repository RobertWHurst/Delta
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/RobertWHurst/Delta
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/RobertWHurst/Delta" "work/ex/beta-1.38-1/sources/1.37.0/gh/RobertWHurst/Delta"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/RobertWHurst/Delta'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/RobertWHurst/Delta" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/RobertWHurst/Delta"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/RobertWHurst/Delta'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b64c3d559c8ba6aa43cd4e9573c009304624c530
[INFO] sha for GitHub repo RobertWHurst/Delta: b64c3d559c8ba6aa43cd4e9573c009304624c530
[INFO] validating manifest of RobertWHurst/Delta 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 RobertWHurst/Delta 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 RobertWHurst/Delta
[INFO] finished frobbing RobertWHurst/Delta
[INFO] frobbed toml for RobertWHurst/Delta written to work/ex/beta-1.38-1/sources/1.37.0/gh/RobertWHurst/Delta/Cargo.toml
[INFO] started frobbing RobertWHurst/Delta
[INFO] finished frobbing RobertWHurst/Delta
[INFO] frobbed toml for RobertWHurst/Delta written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/RobertWHurst/Delta/Cargo.toml
[INFO] crate RobertWHurst/Delta 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing RobertWHurst/Delta 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/RobertWHurst/Delta:/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] e210e7c3f3d863357f7121589d3963442062694d4e4d1b16be0073be4147cfe1
[INFO] running `"docker" "start" "-a" "e210e7c3f3d863357f7121589d3963442062694d4e4d1b16be0073be4147cfe1"`
[INFO] [stderr]    Compiling libc v0.2.28
[INFO] [stderr]    Compiling deflate v0.7.14
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling num_cpus v1.6.2
[INFO] [stderr]    Compiling fs2 v0.2.5
[INFO] [stderr]    Compiling x11-dl v2.14.0
[INFO] [stderr]    Compiling shared_library v0.1.7
[INFO] [stderr]    Compiling time v0.1.38
[INFO] [stderr]    Compiling memmap v0.4.0
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling png v0.8.0
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]    Compiling tempfile v2.1.6
[INFO] [stderr]    Compiling rayon-core v1.2.1
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]    Compiling target_build_utils v0.3.1
[INFO] [stderr]    Compiling rayon v0.8.2
[INFO] [stderr]    Compiling jpeg-decoder v0.1.13
[INFO] [stderr]    Compiling image v0.14.0
[INFO] [stderr]    Compiling libloading v0.3.4
[INFO] [stderr]    Compiling dlib v0.3.1
[INFO] [stderr]    Compiling wayland-sys v0.9.9
[INFO] [stderr]    Compiling wayland-client v0.9.9
[INFO] [stderr]    Compiling wayland-window v0.6.1
[INFO] [stderr]    Compiling wayland-kbd v0.9.1
[INFO] [stderr]    Compiling winit v0.7.5
[INFO] [stderr]    Compiling glutin v0.9.2
[INFO] [stderr]    Compiling delta v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(associated_type_defaults)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(box_syntax)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/element.rs:21:21
[INFO] [stderr]    |
[INFO] [stderr] 21 |     controller: Box<Controller + Send>,
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Controller + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/element.rs:43:46
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn controller(&mut self) -> &mut Box<Controller + Send> {
[INFO] [stderr]    |                                              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Controller + Send`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `delta`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e210e7c3f3d863357f7121589d3963442062694d4e4d1b16be0073be4147cfe1"`
[INFO] running `"docker" "rm" "-f" "e210e7c3f3d863357f7121589d3963442062694d4e4d1b16be0073be4147cfe1"`
[INFO] [stdout] e210e7c3f3d863357f7121589d3963442062694d4e4d1b16be0073be4147cfe1