Sep 10 07:43:57.512 INFO checking tm4c123x-0.4.0 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 07:43:57.512 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 07:43:57.512 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-5/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 07:43:57.752 INFO blam! ffc6289f71397f56718c597c79a79be9c04e814c47fd0c5d097493ba05522421
Sep 10 07:43:57.752 INFO running `"docker" "start" "-a" "ffc6289f71397f56718c597c79a79be9c04e814c47fd0c5d097493ba05522421"`
Sep 10 07:43:58.873 INFO kablam! usermod: no changes
Sep 10 07:43:58.958 INFO kablam!    Compiling cortex-m v0.2.12
Sep 10 07:43:58.966 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Sep 10 07:44:00.232 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 10 07:44:00.232 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Sep 10 07:44:00.232 INFO kablam!    |
Sep 10 07:44:00.232 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Sep 10 07:44:00.232 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Sep 10 07:44:00.232 INFO kablam! 
Sep 10 07:44:00.243 INFO kablam! error: aborting due to previous error
Sep 10 07:44:00.243 INFO kablam! 
Sep 10 07:44:00.243 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 10 07:44:00.249 INFO kablam! error: Could not compile `cortex-m`.
Sep 10 07:44:00.249 INFO kablam! 
Sep 10 07:44:00.249 INFO kablam! To learn more, run the command again with --verbose.
Sep 10 07:44:00.252 INFO kablam! su: No module specific data is present
Sep 10 07:44:01.496 INFO running `"docker" "rm" "-f" "ffc6289f71397f56718c597c79a79be9c04e814c47fd0c5d097493ba05522421"`
Sep 10 07:44:01.599 INFO blam! ffc6289f71397f56718c597c79a79be9c04e814c47fd0c5d097493ba05522421