Aug 01 21:18:58.582 INFO checking stm32f411xx-0.0.1 against 1.27.2 for lazy_static-1
Aug 01 21:18:58.582 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:18:58.582 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:18:58.582 INFO running `"docker" "create" "-v" "/tmp/crater.7ogbjqaUoXDs:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-4/1.27.2:/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 01 21:18:58.750 INFO blam! 9c6368756e584b9301d2999153e792056a81390b8e0823a66ae467405392c52e
Aug 01 21:18:58.752 INFO running `"docker" "start" "-a" "9c6368756e584b9301d2999153e792056a81390b8e0823a66ae467405392c52e"`
Aug 01 21:18:59.856 INFO kablam!     Checking bare-metal v0.1.2
Aug 01 21:18:59.858 INFO kablam!     Checking aligned v0.1.2
Aug 01 21:18:59.861 INFO kablam!     Checking untagged-option v0.1.1
Aug 01 21:18:59.862 INFO kablam!    Compiling cortex-m v0.4.3
Aug 01 21:19:00.090 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:19:00.090 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/untagged-option-0.1.1/src/lib.rs:5:1
Aug 01 21:19:00.090 INFO kablam!   |
Aug 01 21:19:00.090 INFO kablam! 5 | #![feature(untagged_unions, const_fn)]
Aug 01 21:19:00.090 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 21:19:00.090 INFO kablam! 
Aug 01 21:19:00.090 INFO kablam! error: aborting due to previous error
Aug 01 21:19:00.090 INFO kablam! 
Aug 01 21:19:00.090 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:19:00.091 INFO kablam! error: Could not compile `untagged-option`.
Aug 01 21:19:00.091 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 21:19:00.106 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:19:00.106 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:35
Aug 01 21:19:00.106 INFO kablam!   |
Aug 01 21:19:00.106 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 01 21:19:00.106 INFO kablam!   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 21:19:00.106 INFO kablam! 
Aug 01 21:19:00.107 INFO kablam! error: aborting due to previous error
Aug 01 21:19:00.107 INFO kablam! 
Aug 01 21:19:00.107 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:19:00.110 INFO kablam! error: Could not compile `bare-metal`.
Aug 01 21:19:00.111 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 21:19:00.133 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:19:00.133 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/aligned-0.1.2/src/lib.rs:32:35
Aug 01 21:19:00.133 INFO kablam!    |
Aug 01 21:19:00.133 INFO kablam! 32 | #![cfg_attr(feature = "const-fn", feature(const_fn))]
Aug 01 21:19:00.133 INFO kablam!    |                                   ^^^^^^^^^^^^^^^^^^
Aug 01 21:19:00.133 INFO kablam! 
Aug 01 21:19:00.133 INFO kablam! error: aborting due to previous error
Aug 01 21:19:00.135 INFO kablam! 
Aug 01 21:19:00.135 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:19:00.139 INFO kablam! error: Could not compile `aligned`.
Aug 01 21:19:00.140 INFO kablam! 
Aug 01 21:19:00.140 INFO kablam! To learn more, run the command again with --verbose.
Aug 01 21:19:00.141 INFO kablam! su: No module specific data is present
Aug 01 21:19:00.715 INFO running `"docker" "rm" "-f" "9c6368756e584b9301d2999153e792056a81390b8e0823a66ae467405392c52e"`
Aug 01 21:19:00.887 INFO blam! 9c6368756e584b9301d2999153e792056a81390b8e0823a66ae467405392c52e