Dec 03 20:14:19.067 INFO testing acon-0.5.1 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 03 20:14:19.067 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-0/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/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 20:14:19.268 INFO [stdout] cc540b1b8f9e03d57acc189415272ff5c387ca4aac6b78e7f59cef741ef8184e
Dec 03 20:14:19.270 INFO running `"docker" "start" "-a" "cc540b1b8f9e03d57acc189415272ff5c387ca4aac6b78e7f59cef741ef8184e"`
Dec 03 20:14:19.699 INFO [stderr] usermod: no changes
Dec 03 20:14:19.730 INFO [stderr]    Compiling acon v0.5.1 (/source)
Dec 03 20:14:20.449 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 03 20:14:20.449 INFO [stderr]    --> src/lib.rs:110:1
Dec 03 20:14:20.449 INFO [stderr]     |
Dec 03 20:14:20.449 INFO [stderr] 110 | #![feature(test)]
Dec 03 20:14:20.449 INFO [stderr]     | ^^^^^^^^^^^^^^^^^
Dec 03 20:14:20.449 INFO [stderr] 
Dec 03 20:14:20.449 INFO [stderr] error: aborting due to previous error
Dec 03 20:14:20.449 INFO [stderr] 
Dec 03 20:14:20.449 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 20:14:20.455 INFO [stderr] error: Could not compile `acon`.
Dec 03 20:14:20.455 INFO [stderr] 
Dec 03 20:14:20.455 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 20:14:20.457 INFO [stderr] su: No module specific data is present
Dec 03 20:14:20.889 INFO running `"docker" "inspect" "cc540b1b8f9e03d57acc189415272ff5c387ca4aac6b78e7f59cef741ef8184e"`
Dec 03 20:14:20.993 INFO running `"docker" "rm" "-f" "cc540b1b8f9e03d57acc189415272ff5c387ca4aac6b78e7f59cef741ef8184e"`
Dec 03 20:14:21.136 INFO [stdout] cc540b1b8f9e03d57acc189415272ff5c387ca4aac6b78e7f59cef741ef8184e