Aug 02 14:32:53.849 INFO checking atsam4lc8c-0.1.1 against 1.27.2 for lazy_static-1
Aug 02 14:32:53.849 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 14:32:53.849 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 14:32:53.849 INFO running `"docker" "create" "-v" "/tmp/crater.maqCJTMkIw8k:/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 14:32:54.102 INFO blam! ca988f0e622cc3325b733eb0b932ff6ef036ce22cee3ff7030705814e93f1eb6
Aug 02 14:32:54.104 INFO running `"docker" "start" "-a" "ca988f0e622cc3325b733eb0b932ff6ef036ce22cee3ff7030705814e93f1eb6"`
Aug 02 14:32:55.496 INFO kablam!    Compiling atsam4lc8c v0.1.1 (file:///source)
Aug 02 14:32:55.496 INFO kablam!     Checking panic-semihosting v0.2.0
Aug 02 14:32:55.498 INFO kablam!     Checking cortex-m-log v0.2.0
Aug 02 14:32:55.781 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 14:32:55.781 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/panic-semihosting-0.2.0/src/lib.rs:56:1
Aug 02 14:32:55.781 INFO kablam!    |
Aug 02 14:32:55.781 INFO kablam! 56 | #![feature(lang_items)]
Aug 02 14:32:55.781 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 14:32:55.781 INFO kablam! 
Aug 02 14:32:55.782 INFO kablam! error: aborting due to previous error
Aug 02 14:32:55.782 INFO kablam! 
Aug 02 14:32:55.782 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 14:32:55.788 INFO kablam! error: Could not compile `panic-semihosting`.
Aug 02 14:32:55.788 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 14:32:56.664 INFO kablam! error: build failed
Aug 02 14:32:56.670 INFO kablam! su: No module specific data is present
Aug 02 14:32:57.446 INFO running `"docker" "rm" "-f" "ca988f0e622cc3325b733eb0b932ff6ef036ce22cee3ff7030705814e93f1eb6"`
Aug 02 14:32:57.607 INFO blam! ca988f0e622cc3325b733eb0b932ff6ef036ce22cee3ff7030705814e93f1eb6