Dec 03 10:55:01.785 INFO testing get_env-0.1.0 against 1.30.1 for beta-1.31-5
Dec 03 10:55:01.785 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-3/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 10:55:01.995 INFO [stdout] f639ffa4e30e39f44f337de885e4cdf5677dd1378d8167d33d9774f049b196f3
Dec 03 10:55:01.997 INFO running `"docker" "start" "-a" "f639ffa4e30e39f44f337de885e4cdf5677dd1378d8167d33d9774f049b196f3"`
Dec 03 10:55:02.522 INFO [stderr] usermod: no changes
Dec 03 10:55:02.577 INFO [stderr]    Compiling get_env v0.1.0 (/source)
Dec 03 10:55:03.207 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 10:55:03.207 INFO [stderr]   --> src/lib.rs:35:2
Dec 03 10:55:03.207 INFO [stderr]    |
Dec 03 10:55:03.207 INFO [stderr] 35 |       feature(used)
Dec 03 10:55:03.207 INFO [stderr]    |  _____^
Dec 03 10:55:03.207 INFO [stderr] 36 | | )]
Dec 03 10:55:03.207 INFO [stderr]    | |_^
Dec 03 10:55:03.207 INFO [stderr] 
Dec 03 10:55:03.207 INFO [stderr] error: aborting due to previous error
Dec 03 10:55:03.207 INFO [stderr] 
Dec 03 10:55:03.207 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 10:55:03.207 INFO [stderr] error: Could not compile `get_env`.
Dec 03 10:55:03.207 INFO [stderr] 
Dec 03 10:55:03.207 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 10:55:03.211 INFO [stderr] su: No module specific data is present
Dec 03 10:55:03.479 INFO running `"docker" "inspect" "f639ffa4e30e39f44f337de885e4cdf5677dd1378d8167d33d9774f049b196f3"`
Dec 03 10:55:03.561 INFO running `"docker" "rm" "-f" "f639ffa4e30e39f44f337de885e4cdf5677dd1378d8167d33d9774f049b196f3"`
Dec 03 10:55:03.679 INFO [stdout] f639ffa4e30e39f44f337de885e4cdf5677dd1378d8167d33d9774f049b196f3