Dec 03 11:21:20.520 INFO testing futures-bufio-0.2.0 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 03 11:21:20.520 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt 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 11:21:20.827 INFO [stdout] ddbd3be69a883d850c5c611d9f1bab690fe9e156949aa2f4ce4d8832c2441eb1
Dec 03 11:21:20.835 INFO running `"docker" "start" "-a" "ddbd3be69a883d850c5c611d9f1bab690fe9e156949aa2f4ce4d8832c2441eb1"`
Dec 03 11:21:21.959 INFO [stderr] usermod: no changes
Dec 03 11:21:22.064 INFO [stderr]    Compiling futures-bufio v0.2.0 (/source)
Dec 03 11:21:22.796 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 03 11:21:22.796 INFO [stderr]   --> src/lib.rs:10:1
Dec 03 11:21:22.796 INFO [stderr]    |
Dec 03 11:21:22.796 INFO [stderr] 10 | #![feature(conservative_impl_trait)]
Dec 03 11:21:22.796 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 11:21:22.796 INFO [stderr] 
Dec 03 11:21:22.797 INFO [stderr] error: aborting due to previous error
Dec 03 11:21:22.797 INFO [stderr] 
Dec 03 11:21:22.797 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 11:21:22.805 INFO [stderr] error: Could not compile `futures-bufio`.
Dec 03 11:21:22.805 INFO [stderr] 
Dec 03 11:21:22.805 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 11:21:22.806 INFO [stderr] su: No module specific data is present
Dec 03 11:21:23.711 INFO running `"docker" "inspect" "ddbd3be69a883d850c5c611d9f1bab690fe9e156949aa2f4ce4d8832c2441eb1"`
Dec 03 11:21:24.021 INFO running `"docker" "rm" "-f" "ddbd3be69a883d850c5c611d9f1bab690fe9e156949aa2f4ce4d8832c2441eb1"`
Dec 03 11:21:24.351 INFO [stdout] ddbd3be69a883d850c5c611d9f1bab690fe9e156949aa2f4ce4d8832c2441eb1