[INFO] updating cached repository lynncyrin/galaxy-gen
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lynncyrin/galaxy-gen
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lynncyrin/galaxy-gen" "work/ex/beta-1.38-1/sources/1.37.0/gh/lynncyrin/galaxy-gen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lynncyrin/galaxy-gen'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lynncyrin/galaxy-gen" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lynncyrin/galaxy-gen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lynncyrin/galaxy-gen'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 090ac8929653767d1f79021d6503bbe85f0bcfd2
[INFO] sha for GitHub repo lynncyrin/galaxy-gen: 090ac8929653767d1f79021d6503bbe85f0bcfd2
[INFO] validating manifest of lynncyrin/galaxy-gen 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 lynncyrin/galaxy-gen 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 lynncyrin/galaxy-gen
[INFO] finished frobbing lynncyrin/galaxy-gen
[INFO] frobbed toml for lynncyrin/galaxy-gen written to work/ex/beta-1.38-1/sources/1.37.0/gh/lynncyrin/galaxy-gen/Cargo.toml
[INFO] started frobbing lynncyrin/galaxy-gen
[INFO] finished frobbing lynncyrin/galaxy-gen
[INFO] frobbed toml for lynncyrin/galaxy-gen written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lynncyrin/galaxy-gen/Cargo.toml
[INFO] crate lynncyrin/galaxy-gen 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 lynncyrin/galaxy-gen 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/lynncyrin/galaxy-gen:/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] 91dba6e4f4d21e5d728b77074d9decdb064c54c05429d072a99353fa7a4af2c6
[INFO] running `"docker" "start" "-a" "91dba6e4f4d21e5d728b77074d9decdb064c54c05429d072a99353fa7a4af2c6"`
[INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`?
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.21
[INFO] [stderr]    Compiling wasm-bindgen v0.2.21
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling shred-derive v0.5.0
[INFO] [stderr]    Compiling syn v0.15.4
[INFO] [stderr]    Compiling shrev v1.0.1
[INFO] [stderr]    Compiling specs-derive v0.2.0
[INFO] [stderr]    Compiling hibitset v0.5.2
[INFO] [stderr]    Compiling shred v0.7.0
[INFO] [stderr]    Compiling specs v0.12.2
[INFO] [stderr]    Compiling serde_derive v1.0.78
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.21
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.21
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.21
[INFO] [stderr]    Compiling galaxy_gen_backend v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/rust/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_prelude, custom_attribute)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Builder`, `DispatcherBuilder`, `RunNow`, `World`
[INFO] [stderr]   --> src/rust/galaxyecs.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 | use specs::{Builder, DispatcherBuilder, RunNow, World};
[INFO] [stderr]    |             ^^^^^^^  ^^^^^^^^^^^^^^^^^  ^^^^^^  ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `galaxy_gen_backend`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "91dba6e4f4d21e5d728b77074d9decdb064c54c05429d072a99353fa7a4af2c6"`
[INFO] running `"docker" "rm" "-f" "91dba6e4f4d21e5d728b77074d9decdb064c54c05429d072a99353fa7a4af2c6"`
[INFO] [stdout] 91dba6e4f4d21e5d728b77074d9decdb064c54c05429d072a99353fa7a4af2c6