Dec 02 15:21:22.719 INFO testing stm32f407g-disc-0.1.2 against 1.30.1 for beta-1.31-5
Dec 02 15:21:22.719 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/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 02 15:21:23.229 INFO [stdout] 6a8ee2f675b29dd52f23108f5f503fde202d1dfa8b86596cfcae8525e5431aa6
Dec 02 15:21:23.231 INFO running `"docker" "start" "-a" "6a8ee2f675b29dd52f23108f5f503fde202d1dfa8b86596cfcae8525e5431aa6"`
Dec 02 15:21:24.182 INFO [stderr] usermod: no changes
Dec 02 15:21:24.271 INFO [stderr]    Compiling rand_core v0.3.0
Dec 02 15:21:24.271 INFO [stderr]    Compiling cortex-m-rt v0.6.5
Dec 02 15:21:24.271 INFO [stderr]    Compiling stm32f4 v0.4.0
Dec 02 15:21:24.271 INFO [stderr]    Compiling embedded-hal v0.2.2
Dec 02 15:21:24.271 INFO [stderr]    Compiling bare-metal v0.2.4
Dec 02 15:21:24.271 INFO [stderr]    Compiling syn v0.15.22
Dec 02 15:21:25.113 INFO [stderr]    Compiling rand_core v0.2.2
Dec 02 15:21:25.345 INFO [stderr]    Compiling rand v0.5.5
Dec 02 15:21:26.860 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 15:21:26.861 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.2.4/src/lib.rs:7:5
Dec 02 15:21:26.861 INFO [stderr]   |
Dec 02 15:21:26.861 INFO [stderr] 7 | /     feature(const_fn)
Dec 02 15:21:26.861 INFO [stderr] 8 | | )]
Dec 02 15:21:26.861 INFO [stderr]   | |_^
Dec 02 15:21:26.861 INFO [stderr] 
Dec 02 15:21:26.861 INFO [stderr] error: aborting due to previous error
Dec 02 15:21:26.861 INFO [stderr] 
Dec 02 15:21:26.861 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 15:21:26.864 INFO [stderr] error: Could not compile `bare-metal`.
Dec 02 15:21:26.864 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 02 15:21:40.728 INFO [stderr] error: build failed
Dec 02 15:21:40.730 INFO [stderr] su: No module specific data is present
Dec 02 15:21:40.988 INFO running `"docker" "inspect" "6a8ee2f675b29dd52f23108f5f503fde202d1dfa8b86596cfcae8525e5431aa6"`
Dec 02 15:21:41.100 INFO running `"docker" "rm" "-f" "6a8ee2f675b29dd52f23108f5f503fde202d1dfa8b86596cfcae8525e5431aa6"`
Dec 02 15:21:41.195 INFO [stdout] 6a8ee2f675b29dd52f23108f5f503fde202d1dfa8b86596cfcae8525e5431aa6