[INFO] updating cached repository slavam2605/cnn
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/slavam2605/cnn
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/slavam2605/cnn" "work/ex/beta-1.37-6/sources/1.36.0/gh/slavam2605/cnn"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/slavam2605/cnn'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/slavam2605/cnn" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/slavam2605/cnn"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/slavam2605/cnn'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8496c7182ebd52c1c763aee0475dcc01df866de7
[INFO] sha for GitHub repo slavam2605/cnn: 8496c7182ebd52c1c763aee0475dcc01df866de7
[INFO] validating manifest of slavam2605/cnn 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 slavam2605/cnn 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 slavam2605/cnn
[INFO] finished frobbing slavam2605/cnn
[INFO] frobbed toml for slavam2605/cnn written to work/ex/beta-1.37-6/sources/1.36.0/gh/slavam2605/cnn/Cargo.toml
[INFO] started frobbing slavam2605/cnn
[INFO] finished frobbing slavam2605/cnn
[INFO] frobbed toml for slavam2605/cnn written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/slavam2605/cnn/Cargo.toml
[INFO] crate slavam2605/cnn 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 slavam2605/cnn 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-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/slavam2605/cnn:/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] 66cf044772afd1f8dae497bfc85ed2a6b75635a6952e96b9c9e317f56aeb2b2e
[INFO] running `"docker" "start" "-a" "66cf044772afd1f8dae497bfc85ed2a6b75635a6952e96b9c9e317f56aeb2b2e"`
[INFO] [stderr]    Compiling cnn v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.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/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(box_syntax)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `cnn`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "66cf044772afd1f8dae497bfc85ed2a6b75635a6952e96b9c9e317f56aeb2b2e"`
[INFO] running `"docker" "rm" "-f" "66cf044772afd1f8dae497bfc85ed2a6b75635a6952e96b9c9e317f56aeb2b2e"`
[INFO] [stdout] 66cf044772afd1f8dae497bfc85ed2a6b75635a6952e96b9c9e317f56aeb2b2e