[INFO] updating cached repository GGalizzi/composite
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/GGalizzi/composite
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/GGalizzi/composite" "work/ex/beta-1.37-6/sources/1.36.0/gh/GGalizzi/composite"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/GGalizzi/composite'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/GGalizzi/composite" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/GGalizzi/composite"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/GGalizzi/composite'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5f35f4f5fe931886f4d07a5725ad898db53947d4
[INFO] sha for GitHub repo GGalizzi/composite: 5f35f4f5fe931886f4d07a5725ad898db53947d4
[INFO] validating manifest of GGalizzi/composite on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of GGalizzi/composite on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing GGalizzi/composite
[INFO] finished frobbing GGalizzi/composite
[INFO] frobbed toml for GGalizzi/composite written to work/ex/beta-1.37-6/sources/1.36.0/gh/GGalizzi/composite/Cargo.toml
[INFO] started frobbing GGalizzi/composite
[INFO] finished frobbing GGalizzi/composite
[INFO] frobbed toml for GGalizzi/composite written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/GGalizzi/composite/Cargo.toml
[INFO] crate GGalizzi/composite already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing GGalizzi/composite against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/GGalizzi/composite:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] dfe116e1a6958b25013c82424d94677afd868576da49e62b12e265b30c4787b5
[INFO] running `"docker" "start" "-a" "dfe116e1a6958b25013c82424d94677afd868576da49e62b12e265b30c4787b5"`
[INFO] [stderr]    Compiling composite 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:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(append,drain)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ComponentData`, `EntityManager`
[INFO] [stderr]   --> src/behavior.rs:27:38
[INFO] [stderr]    |
[INFO] [stderr] 27 | use super::{Entity,EntityDataHolder, ComponentData, EntityManager};
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::family::FamilyDataHolder`
[INFO] [stderr]   --> src/behavior.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 | use super::family::FamilyDataHolder;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `EntityDataHolder`
[INFO] [stderr]   --> src/behavior.rs:27:20
[INFO] [stderr]    |
[INFO] [stderr] 27 | use super::{Entity,EntityDataHolder, ComponentData, EntityManager};
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^
[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 `composite`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "dfe116e1a6958b25013c82424d94677afd868576da49e62b12e265b30c4787b5"`
[INFO] running `"docker" "rm" "-f" "dfe116e1a6958b25013c82424d94677afd868576da49e62b12e265b30c4787b5"`
[INFO] [stdout] dfe116e1a6958b25013c82424d94677afd868576da49e62b12e265b30c4787b5