Aug 01 21:18:03.796 INFO checking stm32f7x6-0.2.0 against 1.27.2 for lazy_static-1
Aug 01 21:18:03.796 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:18:03.796 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:18:03.796 INFO running `"docker" "create" "-v" "/tmp/crater.UWuFfe3Obbdc:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-0/1.27.2:/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 21:18:04.030 INFO blam! b3dac9058f12497e902e849d5a55f5a9f2f27d117daca23a4929da6422ebac5e
Aug 01 21:18:04.032 INFO running `"docker" "start" "-a" "b3dac9058f12497e902e849d5a55f5a9f2f27d117daca23a4929da6422ebac5e"`
Aug 01 21:18:05.642 INFO kablam!    Compiling cortex-m v0.4.3
Aug 01 21:18:05.646 INFO kablam!     Checking vcell v0.1.0
Aug 01 21:18:05.646 INFO kablam!     Checking bare-metal v0.1.2
Aug 01 21:18:05.646 INFO kablam!     Checking aligned v0.1.2
Aug 01 21:18:05.647 INFO kablam!     Checking untagged-option v0.1.1
Aug 01 21:18:05.944 INFO kablam!     Checking volatile-register v0.2.0
Aug 01 21:18:06.124 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:18:06.124 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/untagged-option-0.1.1/src/lib.rs:5:1
Aug 01 21:18:06.124 INFO kablam!   |
Aug 01 21:18:06.124 INFO kablam! 5 | #![feature(untagged_unions, const_fn)]
Aug 01 21:18:06.124 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 21:18:06.124 INFO kablam! 
Aug 01 21:18:06.131 INFO kablam! error: aborting due to previous error
Aug 01 21:18:06.131 INFO kablam! 
Aug 01 21:18:06.131 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:18:06.141 INFO kablam! error: Could not compile `untagged-option`.
Aug 01 21:18:06.141 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 21:18:06.229 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:18:06.229 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:35
Aug 01 21:18:06.229 INFO kablam!   |
Aug 01 21:18:06.229 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 01 21:18:06.229 INFO kablam!   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 21:18:06.230 INFO kablam! 
Aug 01 21:18:06.230 INFO kablam! error: aborting due to previous error
Aug 01 21:18:06.230 INFO kablam! 
Aug 01 21:18:06.230 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:18:06.240 INFO kablam! error: Could not compile `bare-metal`.
Aug 01 21:18:06.241 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 21:18:06.330 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:18:06.330 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/aligned-0.1.2/src/lib.rs:32:35
Aug 01 21:18:06.330 INFO kablam!    |
Aug 01 21:18:06.330 INFO kablam! 32 | #![cfg_attr(feature = "const-fn", feature(const_fn))]
Aug 01 21:18:06.330 INFO kablam!    |                                   ^^^^^^^^^^^^^^^^^^
Aug 01 21:18:06.333 INFO kablam! 
Aug 01 21:18:06.335 INFO kablam! error: aborting due to previous error
Aug 01 21:18:06.335 INFO kablam! 
Aug 01 21:18:06.335 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:18:06.345 INFO kablam! error: Could not compile `aligned`.
Aug 01 21:18:06.345 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 21:18:07.157 INFO kablam! error: build failed
Aug 01 21:18:07.159 INFO kablam! su: No module specific data is present
Aug 01 21:18:08.509 INFO running `"docker" "rm" "-f" "b3dac9058f12497e902e849d5a55f5a9f2f27d117daca23a4929da6422ebac5e"`
Aug 01 21:18:08.683 INFO blam! b3dac9058f12497e902e849d5a55f5a9f2f27d117daca23a4929da6422ebac5e