Dec 02 10:51:31.971 INFO testing wpilib-0.2.3 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 10:51:31.971 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 10:51:32.475 INFO [stdout] e2866d257f52ea8406be06f3d3cdbf00ffdbc6596478afef5e2952d520d2cec6
Dec 02 10:51:32.479 INFO running `"docker" "start" "-a" "e2866d257f52ea8406be06f3d3cdbf00ffdbc6596478afef5e2952d520d2cec6"`
Dec 02 10:51:33.611 INFO [stderr] usermod: no changes
Dec 02 10:51:33.779 INFO [stderr]    Compiling bindgen v0.37.4
Dec 02 10:51:33.779 INFO [stderr]    Compiling clang-sys v0.23.0
Dec 02 10:51:33.787 INFO [stderr]    Compiling which v1.0.5
Dec 02 10:51:33.787 INFO [stderr]    Compiling nom v3.2.1
Dec 02 10:51:41.347 INFO [stderr]    Compiling cexpr v0.2.3
Dec 02 10:52:25.170 INFO [stderr]    Compiling wpilib-sys v0.2.3
Dec 02 10:52:34.851 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 10:52:34.851 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/wpilib-sys-0.2.3/src/lib.rs:8:1
Dec 02 10:52:34.851 INFO [stderr]   |
Dec 02 10:52:34.851 INFO [stderr] 8 | #![feature(concat_idents)]
Dec 02 10:52:34.851 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 10:52:34.851 INFO [stderr] 
Dec 02 10:52:34.855 INFO [stderr] error: aborting due to previous error
Dec 02 10:52:34.855 INFO [stderr] 
Dec 02 10:52:34.855 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 10:52:34.865 INFO [stderr] error: Could not compile `wpilib-sys`.
Dec 02 10:52:34.865 INFO [stderr] 
Dec 02 10:52:34.865 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 10:52:34.867 INFO [stderr] su: No module specific data is present
Dec 02 10:52:36.154 INFO running `"docker" "inspect" "e2866d257f52ea8406be06f3d3cdbf00ffdbc6596478afef5e2952d520d2cec6"`
Dec 02 10:52:36.507 INFO running `"docker" "rm" "-f" "e2866d257f52ea8406be06f3d3cdbf00ffdbc6596478afef5e2952d520d2cec6"`
Dec 02 10:52:36.839 INFO [stdout] e2866d257f52ea8406be06f3d3cdbf00ffdbc6596478afef5e2952d520d2cec6