Dec 03 20:14:40.097 INFO testing acgmath-0.1.1 against 1.30.1 for beta-1.31-5
Dec 03 20:14:40.097 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/beta-1.31-5/1.30.1:/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 +1.30.1 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 20:14:40.255 INFO [stdout] b2c896b0ac2f6c15ee87a10bbad087c06f8acb20e9abb1c3bcbcc10f532967d3
Dec 03 20:14:40.260 INFO running `"docker" "start" "-a" "b2c896b0ac2f6c15ee87a10bbad087c06f8acb20e9abb1c3bcbcc10f532967d3"`
Dec 03 20:14:40.755 INFO [stderr] usermod: no changes
Dec 03 20:14:40.883 INFO [stderr]    Compiling simd v0.2.3
Dec 03 20:14:43.495 INFO [stderr]    Compiling acgmath v0.1.1 (/source)
Dec 03 20:14:45.331 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 20:14:45.331 INFO [stderr]   --> src/lib.rs:52:35
Dec 03 20:14:45.331 INFO [stderr]    |
Dec 03 20:14:45.331 INFO [stderr] 52 | #![cfg_attr(feature = "use_simd", feature(specialization))]
Dec 03 20:14:45.331 INFO [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 20:14:45.331 INFO [stderr] 
Dec 03 20:14:45.387 INFO [stderr] error: aborting due to previous error
Dec 03 20:14:45.387 INFO [stderr] 
Dec 03 20:14:45.387 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 20:14:45.395 INFO [stderr] error: Could not compile `acgmath`.
Dec 03 20:14:45.396 INFO [stderr] 
Dec 03 20:14:45.396 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 20:14:45.396 INFO [stderr] su: No module specific data is present
Dec 03 20:14:45.864 INFO running `"docker" "inspect" "b2c896b0ac2f6c15ee87a10bbad087c06f8acb20e9abb1c3bcbcc10f532967d3"`
Dec 03 20:14:45.957 INFO running `"docker" "rm" "-f" "b2c896b0ac2f6c15ee87a10bbad087c06f8acb20e9abb1c3bcbcc10f532967d3"`
Dec 03 20:14:46.063 INFO [stdout] b2c896b0ac2f6c15ee87a10bbad087c06f8acb20e9abb1c3bcbcc10f532967d3