Dec 03 03:11:53.430 INFO testing lib_composite-0.6.0 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 03 03:11:53.430 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-6/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/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 03:11:53.675 INFO [stdout] 68bf27b7cee434a2612af42a51c71f2f99c152d90e628bd14eec058806b57587
Dec 03 03:11:53.682 INFO running `"docker" "start" "-a" "68bf27b7cee434a2612af42a51c71f2f99c152d90e628bd14eec058806b57587"`
Dec 03 03:11:54.267 INFO [stderr] usermod: no changes
Dec 03 03:11:54.315 INFO [stderr]    Compiling cfg-if v0.1.6
Dec 03 03:11:54.315 INFO [stderr]    Compiling const-cstr-fork v0.2.2
Dec 03 03:11:55.107 INFO [stderr]    Compiling libc-extra v0.0.15
Dec 03 03:11:58.979 INFO [stderr]    Compiling lib_composite v0.6.0 (/source)
Dec 03 03:11:59.599 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 03 03:11:59.599 INFO [stderr]  --> src/lib.rs:4:1
Dec 03 03:11:59.599 INFO [stderr]   |
Dec 03 03:11:59.599 INFO [stderr] 4 | #![feature(optin_builtin_traits)]
Dec 03 03:11:59.599 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 03:11:59.599 INFO [stderr] 
Dec 03 03:11:59.599 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 03 03:11:59.599 INFO [stderr]  --> src/lib.rs:6:1
Dec 03 03:11:59.599 INFO [stderr]   |
Dec 03 03:11:59.599 INFO [stderr] 6 | #![feature(fnbox)]
Dec 03 03:11:59.599 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^
Dec 03 03:11:59.599 INFO [stderr] 
Dec 03 03:11:59.600 INFO [stderr] error: aborting due to 2 previous errors
Dec 03 03:11:59.600 INFO [stderr] 
Dec 03 03:11:59.600 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 03:11:59.606 INFO [stderr] error: Could not compile `lib_composite`.
Dec 03 03:11:59.606 INFO [stderr] 
Dec 03 03:11:59.606 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 03:11:59.608 INFO [stderr] su: No module specific data is present
Dec 03 03:11:59.956 INFO running `"docker" "inspect" "68bf27b7cee434a2612af42a51c71f2f99c152d90e628bd14eec058806b57587"`
Dec 03 03:12:00.080 INFO running `"docker" "rm" "-f" "68bf27b7cee434a2612af42a51c71f2f99c152d90e628bd14eec058806b57587"`
Dec 03 03:12:00.180 INFO [stdout] 68bf27b7cee434a2612af42a51c71f2f99c152d90e628bd14eec058806b57587