Dec 03 17:40:40.615 INFO testing buffering-0.2.0 against 1.30.1 for beta-1.31-5
Dec 03 17:40:40.615 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-6/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/beta-1.31-5/1.30.1:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 03 17:40:40.940 INFO [stdout] 8fc2e32f650a28759be984accefd91cef2f1861c74fb44ea7897ab7adb85e9fe
Dec 03 17:40:40.942 INFO running `"docker" "start" "-a" "8fc2e32f650a28759be984accefd91cef2f1861c74fb44ea7897ab7adb85e9fe"`
Dec 03 17:40:41.328 INFO [stderr] usermod: no changes
Dec 03 17:40:41.361 INFO [stderr]    Compiling buffering_nocopy_macro v0.1.0
Dec 03 17:40:45.582 INFO [stderr]    Compiling buffering v0.2.0 (/source)
Dec 03 17:40:46.267 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 17:40:46.267 INFO [stderr]  --> src/lib.rs:1:1
Dec 03 17:40:46.268 INFO [stderr]   |
Dec 03 17:40:46.268 INFO [stderr] 1 | #![feature(custom_attribute)]
Dec 03 17:40:46.268 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 17:40:46.268 INFO [stderr] 
Dec 03 17:40:46.268 INFO [stderr] error: aborting due to previous error
Dec 03 17:40:46.268 INFO [stderr] 
Dec 03 17:40:46.268 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 17:40:46.274 INFO [stderr] error: Could not compile `buffering`.
Dec 03 17:40:46.274 INFO [stderr] 
Dec 03 17:40:46.274 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 17:40:46.275 INFO [stderr] su: No module specific data is present
Dec 03 17:40:46.870 INFO running `"docker" "inspect" "8fc2e32f650a28759be984accefd91cef2f1861c74fb44ea7897ab7adb85e9fe"`
Dec 03 17:40:47.036 INFO running `"docker" "rm" "-f" "8fc2e32f650a28759be984accefd91cef2f1861c74fb44ea7897ab7adb85e9fe"`
Dec 03 17:40:47.291 INFO [stdout] 8fc2e32f650a28759be984accefd91cef2f1861c74fb44ea7897ab7adb85e9fe