Dec 02 21:04:42.470 INFO testing rats-0.0.1 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 21:04:42.470 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/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 02 21:04:42.912 INFO [stdout] 85fa6ab48d0bbb3111669958cc3165a46277c27e6b729035f784faa64dec9854
Dec 02 21:04:42.914 INFO running `"docker" "start" "-a" "85fa6ab48d0bbb3111669958cc3165a46277c27e6b729035f784faa64dec9854"`
Dec 02 21:04:44.894 INFO [stderr] usermod: no changes
Dec 02 21:04:44.971 INFO [stderr]    Compiling futures-core-preview v0.2.3
Dec 02 21:04:46.275 INFO [stderr]    Compiling futures-channel-preview v0.2.2
Dec 02 21:04:46.275 INFO [stderr]    Compiling futures-io-preview v0.2.2
Dec 02 21:04:47.695 INFO [stderr]    Compiling futures-sink-preview v0.2.2
Dec 02 21:04:48.704 INFO [stderr]    Compiling futures-util-preview v0.2.2
Dec 02 21:04:52.575 INFO [stderr]    Compiling futures-executor-preview v0.2.2
Dec 02 21:04:55.382 INFO [stderr]    Compiling futures-stable-preview v0.2.3
Dec 02 21:04:55.527 INFO [stderr]    Compiling futures-async-runtime-preview v0.2.3
Dec 02 21:04:55.722 INFO [stderr]    Compiling futures-preview v0.2.2
Dec 02 21:04:56.967 INFO [stderr]    Compiling rats v0.0.1 (/source)
Dec 02 21:04:58.416 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 21:04:58.416 INFO [stderr]  --> src/lib.rs:1:1
Dec 02 21:04:58.416 INFO [stderr]   |
Dec 02 21:04:58.416 INFO [stderr] 1 | #![feature(test)]
Dec 02 21:04:58.416 INFO [stderr]   | ^^^^^^^^^^^^^^^^^
Dec 02 21:04:58.416 INFO [stderr] 
Dec 02 21:04:58.417 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 21:04:58.417 INFO [stderr]  --> src/lib.rs:2:1
Dec 02 21:04:58.417 INFO [stderr]   |
Dec 02 21:04:58.417 INFO [stderr] 2 | #![feature(associated_type_defaults)]
Dec 02 21:04:58.417 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 21:04:58.419 INFO [stderr] 
Dec 02 21:04:58.419 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 21:04:58.419 INFO [stderr]  --> src/lib.rs:3:1
Dec 02 21:04:58.419 INFO [stderr]   |
Dec 02 21:04:58.419 INFO [stderr] 3 | #![feature(specialization)]
Dec 02 21:04:58.419 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 21:04:58.419 INFO [stderr] 
Dec 02 21:04:58.419 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 21:04:58.419 INFO [stderr]  --> src/lib.rs:4:1
Dec 02 21:04:58.419 INFO [stderr]   |
Dec 02 21:04:58.419 INFO [stderr] 4 | #![feature(tool_attributes)]
Dec 02 21:04:58.419 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 21:04:58.419 INFO [stderr] 
Dec 02 21:04:58.419 INFO [stderr] error: aborting due to 4 previous errors
Dec 02 21:04:58.419 INFO [stderr] 
Dec 02 21:04:58.420 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 21:04:58.428 INFO [stderr] error: Could not compile `rats`.
Dec 02 21:04:58.428 INFO [stderr] 
Dec 02 21:04:58.428 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 21:04:58.430 INFO [stderr] su: No module specific data is present
Dec 02 21:04:59.154 INFO running `"docker" "inspect" "85fa6ab48d0bbb3111669958cc3165a46277c27e6b729035f784faa64dec9854"`
Dec 02 21:04:59.497 INFO running `"docker" "rm" "-f" "85fa6ab48d0bbb3111669958cc3165a46277c27e6b729035f784faa64dec9854"`
Dec 02 21:04:59.787 INFO [stdout] 85fa6ab48d0bbb3111669958cc3165a46277c27e6b729035f784faa64dec9854