Aug 02 03:24:53.961 INFO checking nrf51-0.5.0 against 1.27.2 for lazy_static-1
Aug 02 03:24:53.961 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:24:53.961 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:24:53.962 INFO running `"docker" "create" "-v" "/tmp/crater.Bd9EJiKMWtTY:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-6/1.27.2:/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 03:24:54.271 INFO blam! 09cccc8bfcb546f13f816b47e01043d11d0757b06fea1175e4010b35c3a2dbae
Aug 02 03:24:54.273 INFO running `"docker" "start" "-a" "09cccc8bfcb546f13f816b47e01043d11d0757b06fea1175e4010b35c3a2dbae"`
Aug 02 03:24:55.186 INFO kablam!    Compiling nrf51 v0.5.0 (file:///source)
Aug 02 03:24:55.187 INFO kablam!     Checking bare-metal v0.2.0
Aug 02 03:24:55.188 INFO kablam!    Compiling cortex-m-rt v0.5.1
Aug 02 03:24:55.462 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 03:24:55.463 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.2.0/src/lib.rs:5:35
Aug 02 03:24:55.463 INFO kablam!   |
Aug 02 03:24:55.463 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 02 03:24:55.463 INFO kablam!   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 03:24:55.464 INFO kablam! 
Aug 02 03:24:55.464 INFO kablam! error: aborting due to previous error
Aug 02 03:24:55.464 INFO kablam! 
Aug 02 03:24:55.464 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 03:24:55.470 INFO kablam! error: Could not compile `bare-metal`.
Aug 02 03:24:55.470 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 03:24:56.418 INFO kablam! error: build failed
Aug 02 03:24:56.418 INFO kablam! su: No module specific data is present
Aug 02 03:24:57.296 INFO running `"docker" "rm" "-f" "09cccc8bfcb546f13f816b47e01043d11d0757b06fea1175e4010b35c3a2dbae"`
Aug 02 03:24:57.439 INFO blam! 09cccc8bfcb546f13f816b47e01043d11d0757b06fea1175e4010b35c3a2dbae