Dec 03 02:07:20.769 INFO testing math_traits-0.2.1 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 03 02:07:20.769 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-1/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/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 02:07:20.930 INFO [stdout] 2abb005052451dd4efa16b4e15edc1fcec0545c9498ff114ec942b028f9a336e
Dec 03 02:07:20.937 INFO running `"docker" "start" "-a" "2abb005052451dd4efa16b4e15edc1fcec0545c9498ff114ec942b028f9a336e"`
Dec 03 02:07:21.376 INFO [stderr] usermod: no changes
Dec 03 02:07:21.453 INFO [stderr]    Compiling tuple v0.4.2
Dec 03 02:07:26.316 INFO [stderr]    Compiling math_traits v0.2.1 (/source)
Dec 03 02:07:27.597 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 03 02:07:27.597 INFO [stderr]  --> src/lib.rs:1:1
Dec 03 02:07:27.597 INFO [stderr]   |
Dec 03 02:07:27.597 INFO [stderr] 1 | #![feature(core_intrinsics)]
Dec 03 02:07:27.598 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 02:07:27.598 INFO [stderr] 
Dec 03 02:07:27.598 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 03 02:07:27.598 INFO [stderr]  --> src/lib.rs:2:1
Dec 03 02:07:27.598 INFO [stderr]   |
Dec 03 02:07:27.598 INFO [stderr] 2 | #![feature(const_fn)]
Dec 03 02:07:27.598 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
Dec 03 02:07:27.598 INFO [stderr] 
Dec 03 02:07:27.598 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 03 02:07:27.598 INFO [stderr]  --> src/lib.rs:3:1
Dec 03 02:07:27.598 INFO [stderr]   |
Dec 03 02:07:27.598 INFO [stderr] 3 | #![feature(concat_idents)]
Dec 03 02:07:27.598 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 02:07:27.598 INFO [stderr] 
Dec 03 02:07:27.609 INFO [stderr] error: aborting due to 3 previous errors
Dec 03 02:07:27.609 INFO [stderr] 
Dec 03 02:07:27.609 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 02:07:27.616 INFO [stderr] error: Could not compile `math_traits`.
Dec 03 02:07:27.616 INFO [stderr] 
Dec 03 02:07:27.616 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 02:07:27.617 INFO [stderr] su: No module specific data is present
Dec 03 02:07:27.868 INFO running `"docker" "inspect" "2abb005052451dd4efa16b4e15edc1fcec0545c9498ff114ec942b028f9a336e"`
Dec 03 02:07:27.986 INFO running `"docker" "rm" "-f" "2abb005052451dd4efa16b4e15edc1fcec0545c9498ff114ec942b028f9a336e"`
Dec 03 02:07:28.081 INFO [stdout] 2abb005052451dd4efa16b4e15edc1fcec0545c9498ff114ec942b028f9a336e