Dec 03 20:14:20.052 INFO testing acon-0.5.1 against 1.30.1 for beta-1.31-5
Dec 03 20:14:20.052 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-4/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/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 20:14:20.381 INFO [stdout] 38cc13dced473d53a62f8881b0c96a628ef2c4e4e8eece78e845fed7fd91237b
Dec 03 20:14:20.383 INFO running `"docker" "start" "-a" "38cc13dced473d53a62f8881b0c96a628ef2c4e4e8eece78e845fed7fd91237b"`
Dec 03 20:14:21.005 INFO [stderr] usermod: no changes
Dec 03 20:14:21.039 INFO [stderr]    Compiling acon v0.5.1 (/source)
Dec 03 20:14:21.863 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 20:14:21.863 INFO [stderr]    --> src/lib.rs:110:1
Dec 03 20:14:21.863 INFO [stderr]     |
Dec 03 20:14:21.863 INFO [stderr] 110 | #![feature(test)]
Dec 03 20:14:21.863 INFO [stderr]     | ^^^^^^^^^^^^^^^^^
Dec 03 20:14:21.863 INFO [stderr] 
Dec 03 20:14:21.863 INFO [stderr] error: aborting due to previous error
Dec 03 20:14:21.863 INFO [stderr] 
Dec 03 20:14:21.863 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 20:14:21.865 INFO [stderr] error: Could not compile `acon`.
Dec 03 20:14:21.865 INFO [stderr] 
Dec 03 20:14:21.865 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 20:14:21.866 INFO [stderr] su: No module specific data is present
Dec 03 20:14:22.267 INFO running `"docker" "inspect" "38cc13dced473d53a62f8881b0c96a628ef2c4e4e8eece78e845fed7fd91237b"`
Dec 03 20:14:22.372 INFO running `"docker" "rm" "-f" "38cc13dced473d53a62f8881b0c96a628ef2c4e4e8eece78e845fed7fd91237b"`
Dec 03 20:14:22.493 INFO [stdout] 38cc13dced473d53a62f8881b0c96a628ef2c4e4e8eece78e845fed7fd91237b