Dec 02 07:33:14.380 INFO testing GGalizzi/composite against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 07:33:14.380 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 02 07:33:14.652 INFO [stdout] 7fbf23a61e40c944fd5b7f349dbef0fdce7069b3f236f66c8ab14bf7a5e192ce
Dec 02 07:33:14.656 INFO running `"docker" "start" "-a" "7fbf23a61e40c944fd5b7f349dbef0fdce7069b3f236f66c8ab14bf7a5e192ce"`
Dec 02 07:33:15.334 INFO [stderr] usermod: no changes
Dec 02 07:33:15.379 INFO [stderr]    Compiling composite v0.1.0 (/source)
Dec 02 07:33:15.887 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 07:33:15.887 INFO [stderr]  --> src/lib.rs:5:1
Dec 02 07:33:15.887 INFO [stderr]   |
Dec 02 07:33:15.887 INFO [stderr] 5 | #![feature(append,drain)]
Dec 02 07:33:15.887 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 07:33:15.887 INFO [stderr] 
Dec 02 07:33:15.887 INFO [stderr] error: aborting due to previous error
Dec 02 07:33:15.887 INFO [stderr] 
Dec 02 07:33:15.887 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 07:33:15.894 INFO [stderr] error: Could not compile `composite`.
Dec 02 07:33:15.894 INFO [stderr] 
Dec 02 07:33:15.894 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 07:33:15.895 INFO [stderr] su: No module specific data is present
Dec 02 07:33:16.381 INFO running `"docker" "inspect" "7fbf23a61e40c944fd5b7f349dbef0fdce7069b3f236f66c8ab14bf7a5e192ce"`
Dec 02 07:33:16.625 INFO running `"docker" "rm" "-f" "7fbf23a61e40c944fd5b7f349dbef0fdce7069b3f236f66c8ab14bf7a5e192ce"`
Dec 02 07:33:16.724 INFO [stdout] 7fbf23a61e40c944fd5b7f349dbef0fdce7069b3f236f66c8ab14bf7a5e192ce