Sep 05 21:52:11.174 INFO checking tm4c123x-0.4.0 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 05 21:52:11.174 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 05 21:52:11.174 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-0/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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 +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 05 21:52:11.656 INFO blam! 4267020bddc2550a5e6f34a84bc9c924e4bfbcce5f4b74031340b473586ad9aa
Sep 05 21:52:11.657 INFO running `"docker" "start" "-a" "4267020bddc2550a5e6f34a84bc9c924e4bfbcce5f4b74031340b473586ad9aa"`
Sep 05 21:52:14.002 INFO kablam! usermod: no changes
Sep 05 21:52:14.144 INFO kablam!    Compiling cortex-m v0.2.12
Sep 05 21:52:14.145 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Sep 05 21:52:15.587 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 05 21:52:15.587 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Sep 05 21:52:15.587 INFO kablam!    |
Sep 05 21:52:15.587 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Sep 05 21:52:15.587 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Sep 05 21:52:15.587 INFO kablam! 
Sep 05 21:52:15.600 INFO kablam! error: aborting due to previous error
Sep 05 21:52:15.600 INFO kablam! 
Sep 05 21:52:15.600 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 05 21:52:15.606 INFO kablam! error: Could not compile `cortex-m`.
Sep 05 21:52:15.607 INFO kablam! 
Sep 05 21:52:15.607 INFO kablam! To learn more, run the command again with --verbose.
Sep 05 21:52:15.608 INFO kablam! su: No module specific data is present
Sep 05 21:52:17.910 INFO running `"docker" "rm" "-f" "4267020bddc2550a5e6f34a84bc9c924e4bfbcce5f4b74031340b473586ad9aa"`
Sep 05 21:52:18.273 INFO blam! 4267020bddc2550a5e6f34a84bc9c924e4bfbcce5f4b74031340b473586ad9aa