Aug 02 12:22:16.161 INFO checking cortex-m-rtfm-macros-0.3.1 against 1.27.2 for lazy_static-1
Aug 02 12:22:16.161 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:22:16.161 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:22:16.161 INFO running `"docker" "create" "-v" "/tmp/crater.E9ooUpemZzmN:/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 12:22:16.425 INFO blam! 9d3aabaf9a8f8a7fd8123762c71d7ba079d16d663e60da2d78f5f65f31025a7d
Aug 02 12:22:16.426 INFO running `"docker" "start" "-a" "9d3aabaf9a8f8a7fd8123762c71d7ba079d16d663e60da2d78f5f65f31025a7d"`
Aug 02 12:22:17.749 INFO kablam!     Checking proc-macro2 v0.3.8
Aug 02 12:22:19.334 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 12:22:19.334 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.3.8/src/lib.rs:47:34
Aug 02 12:22:19.334 INFO kablam!    |
Aug 02 12:22:19.334 INFO kablam! 47 | #![cfg_attr(feature = "nightly", feature(proc_macro))]
Aug 02 12:22:19.334 INFO kablam!    |                                  ^^^^^^^^^^^^^^^^^^^^
Aug 02 12:22:19.334 INFO kablam! 
Aug 02 12:22:19.345 INFO kablam! error: aborting due to previous error
Aug 02 12:22:19.345 INFO kablam! 
Aug 02 12:22:19.345 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 12:22:19.359 INFO kablam! error: Could not compile `proc-macro2`.
Aug 02 12:22:19.359 INFO kablam! 
Aug 02 12:22:19.359 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 12:22:19.361 INFO kablam! su: No module specific data is present
Aug 02 12:22:20.042 INFO running `"docker" "rm" "-f" "9d3aabaf9a8f8a7fd8123762c71d7ba079d16d663e60da2d78f5f65f31025a7d"`
Aug 02 12:22:20.199 INFO blam! 9d3aabaf9a8f8a7fd8123762c71d7ba079d16d663e60da2d78f5f65f31025a7d