Dec 03 00:15:38.951 INFO testing nrf52840-0.2.0 against 1.30.1 for beta-1.31-5
Dec 03 00:15:38.952 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-4/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/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 00:15:39.491 INFO [stdout] 3123e1f8840f6e05d37cfa67f025c6d4afbac5d18f14cc3379452d082e438854
Dec 03 00:15:39.495 INFO running `"docker" "start" "-a" "3123e1f8840f6e05d37cfa67f025c6d4afbac5d18f14cc3379452d082e438854"`
Dec 03 00:15:41.127 INFO [stderr] usermod: no changes
Dec 03 00:15:41.272 INFO [stderr]    Compiling nrf52840 v0.2.0 (/source)
Dec 03 00:15:47.335 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 00:15:47.335 INFO [stderr]  --> src/lib.rs:6:1
Dec 03 00:15:47.335 INFO [stderr]   |
Dec 03 00:15:47.335 INFO [stderr] 6 | #![feature(untagged_unions)]
Dec 03 00:15:47.335 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 00:15:47.335 INFO [stderr] 
Dec 03 00:15:47.851 INFO [stderr] error: aborting due to previous error
Dec 03 00:15:47.851 INFO [stderr] 
Dec 03 00:15:47.851 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 00:15:47.867 INFO [stderr] error: Could not compile `nrf52840`.
Dec 03 00:15:47.867 INFO [stderr] 
Dec 03 00:15:47.867 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 00:15:47.867 INFO [stderr] su: No module specific data is present
Dec 03 00:15:48.381 INFO running `"docker" "inspect" "3123e1f8840f6e05d37cfa67f025c6d4afbac5d18f14cc3379452d082e438854"`
Dec 03 00:15:48.470 INFO running `"docker" "rm" "-f" "3123e1f8840f6e05d37cfa67f025c6d4afbac5d18f14cc3379452d082e438854"`
Dec 03 00:15:48.588 INFO [stdout] 3123e1f8840f6e05d37cfa67f025c6d4afbac5d18f14cc3379452d082e438854