Aug 02 11:00:40.354 INFO checking efm32gg-stk3700-0.1.0 against 1.27.2 for lazy_static-1
Aug 02 11:00:40.354 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 11:00:40.354 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 11:00:40.354 INFO running `"docker" "create" "-v" "/tmp/crater.xdJmp35YFD5B:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-7/1.27.2:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +1.27.2 check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Aug 02 11:00:40.616 INFO blam! 66721ec10cafe238316cf0334ad0dda4765d3a8df6920bd6d227eaac7ef18b52
Aug 02 11:00:40.618 INFO running `"docker" "start" "-a" "66721ec10cafe238316cf0334ad0dda4765d3a8df6920bd6d227eaac7ef18b52"`
Aug 02 11:00:41.615 INFO kablam!     Checking bare-metal v0.1.2
Aug 02 11:00:41.617 INFO kablam!    Compiling cortex-m-rt v0.5.1
Aug 02 11:00:41.619 INFO kablam!    Compiling cortex-m-semihosting v0.3.0
Aug 02 11:00:41.966 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 11:00:41.966 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:35
Aug 02 11:00:41.966 INFO kablam!   |
Aug 02 11:00:41.966 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 02 11:00:41.966 INFO kablam!   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 11:00:41.966 INFO kablam! 
Aug 02 11:00:41.966 INFO kablam! error: aborting due to previous error
Aug 02 11:00:41.966 INFO kablam! 
Aug 02 11:00:41.966 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 11:00:41.977 INFO kablam! error: Could not compile `bare-metal`.
Aug 02 11:00:41.978 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 11:00:43.613 INFO kablam! error: build failed
Aug 02 11:00:43.614 INFO kablam! su: No module specific data is present
Aug 02 11:00:44.243 INFO running `"docker" "rm" "-f" "66721ec10cafe238316cf0334ad0dda4765d3a8df6920bd6d227eaac7ef18b52"`
Aug 02 11:00:44.394 INFO blam! 66721ec10cafe238316cf0334ad0dda4765d3a8df6920bd6d227eaac7ef18b52