Aug 02 14:32:51.788 INFO checking atsamd21-hal-0.1.0 against 1.27.2 for lazy_static-1
Aug 02 14:32:51.788 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 14:32:51.788 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 14:32:51.788 INFO running `"docker" "create" "-v" "/tmp/crater.jHmEZ5Z43GmF:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-1/1.27.2:/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 14:32:51.966 INFO blam! a143972cf4520a42b2d311f0d3f6592bd8d007413a98df7538dc59f076f015be
Aug 02 14:32:51.969 INFO running `"docker" "start" "-a" "a143972cf4520a42b2d311f0d3f6592bd8d007413a98df7538dc59f076f015be"`
Aug 02 14:32:53.495 INFO kablam!     Checking aligned v0.1.2
Aug 02 14:32:53.495 INFO kablam!     Checking untagged-option v0.1.1
Aug 02 14:32:53.495 INFO kablam!     Checking bare-metal v0.1.2
Aug 02 14:32:53.651 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 14:32:53.651 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/untagged-option-0.1.1/src/lib.rs:5:1
Aug 02 14:32:53.651 INFO kablam!   |
Aug 02 14:32:53.651 INFO kablam! 5 | #![feature(untagged_unions, const_fn)]
Aug 02 14:32:53.651 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 14:32:53.651 INFO kablam! 
Aug 02 14:32:53.651 INFO kablam! error: aborting due to previous error
Aug 02 14:32:53.651 INFO kablam! 
Aug 02 14:32:53.651 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 14:32:53.656 INFO kablam! error: Could not compile `untagged-option`.
Aug 02 14:32:53.656 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 14:32:53.708 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 14:32:53.708 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:35
Aug 02 14:32:53.708 INFO kablam!   |
Aug 02 14:32:53.708 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 02 14:32:53.708 INFO kablam!   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 14:32:53.708 INFO kablam! 
Aug 02 14:32:53.708 INFO kablam! error: aborting due to previous error
Aug 02 14:32:53.708 INFO kablam! 
Aug 02 14:32:53.708 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 14:32:53.712 INFO kablam! error: Could not compile `bare-metal`.
Aug 02 14:32:53.712 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 14:32:53.755 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 14:32:53.755 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/aligned-0.1.2/src/lib.rs:32:35
Aug 02 14:32:53.755 INFO kablam!    |
Aug 02 14:32:53.755 INFO kablam! 32 | #![cfg_attr(feature = "const-fn", feature(const_fn))]
Aug 02 14:32:53.755 INFO kablam!    |                                   ^^^^^^^^^^^^^^^^^^
Aug 02 14:32:53.755 INFO kablam! 
Aug 02 14:32:53.757 INFO kablam! error: aborting due to previous error
Aug 02 14:32:53.757 INFO kablam! 
Aug 02 14:32:53.757 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 14:32:53.765 INFO kablam! error: Could not compile `aligned`.
Aug 02 14:32:53.765 INFO kablam! 
Aug 02 14:32:53.765 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 14:32:53.766 INFO kablam! su: No module specific data is present
Aug 02 14:32:54.367 INFO running `"docker" "rm" "-f" "a143972cf4520a42b2d311f0d3f6592bd8d007413a98df7538dc59f076f015be"`
Aug 02 14:32:54.558 INFO blam! a143972cf4520a42b2d311f0d3f6592bd8d007413a98df7538dc59f076f015be