Aug 02 00:29:45.883 INFO checking riscv-rt-0.1.3 against 1.27.2+tmplazy for lazy_static-1
Aug 02 00:29:45.883 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 00:29:45.883 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 00:29:45.883 INFO running `"docker" "create" "-v" "/tmp/crater.JrKOT2yc8JLw:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-0/1.27.2+tmplazy:/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 00:29:46.141 INFO blam! 6f579b22c86d55281f3906a27ca1ddae9aaecf82ef9684ef9b72ae129d9cf489
Aug 02 00:29:46.143 INFO running `"docker" "start" "-a" "6f579b22c86d55281f3906a27ca1ddae9aaecf82ef9684ef9b72ae129d9cf489"`
Aug 02 00:29:47.356 INFO kablam!    Compiling riscv-rt v0.1.3 (file:///source)
Aug 02 00:29:47.357 INFO kablam!     Checking bare-metal v0.1.2
Aug 02 00:29:47.359 INFO kablam!     Checking r0 v0.2.2
Aug 02 00:29:47.890 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 00:29:47.890 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:35
Aug 02 00:29:47.890 INFO kablam!   |
Aug 02 00:29:47.890 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 02 00:29:47.890 INFO kablam!   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 00:29:47.890 INFO kablam! 
Aug 02 00:29:47.891 INFO kablam! error: aborting due to previous error
Aug 02 00:29:47.892 INFO kablam! 
Aug 02 00:29:47.892 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 00:29:47.899 INFO kablam! error: Could not compile `bare-metal`.
Aug 02 00:29:47.899 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 00:29:49.013 INFO kablam! error: build failed
Aug 02 00:29:49.015 INFO kablam! su: No module specific data is present
Aug 02 00:29:49.890 INFO running `"docker" "rm" "-f" "6f579b22c86d55281f3906a27ca1ddae9aaecf82ef9684ef9b72ae129d9cf489"`
Aug 02 00:29:49.998 INFO blam! 6f579b22c86d55281f3906a27ca1ddae9aaecf82ef9684ef9b72ae129d9cf489