Aug 30 00:51:24.813 INFO checking tm4c123x-0.4.0 against try#2d477f9981361618ac78253c28051a66b6cea125 for pr-53707
Aug 30 00:51:24.813 INFO running: cargo +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets
Aug 30 00:51:24.813 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53707/try#2d477f9981361618ac78253c28051a66b6cea125:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-2/try#2d477f9981361618ac78253c28051a66b6cea125:/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=500" "-e" "CMD=cargo +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 00:51:25.030 INFO blam! 3b48c8b80b512edef8fbc79acb3a8da015b8787bf0a465b998f9fc7b2ffb53df
Aug 30 00:51:25.032 INFO running `"docker" "start" "-a" "3b48c8b80b512edef8fbc79acb3a8da015b8787bf0a465b998f9fc7b2ffb53df"`
Aug 30 00:51:25.668 INFO kablam!    Compiling cortex-m v0.2.12
Aug 30 00:51:25.668 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Aug 30 00:51:26.740 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 30 00:51:26.740 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Aug 30 00:51:26.740 INFO kablam!    |
Aug 30 00:51:26.741 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Aug 30 00:51:26.741 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Aug 30 00:51:26.741 INFO kablam! 
Aug 30 00:51:26.755 INFO kablam! error: aborting due to previous error
Aug 30 00:51:26.755 INFO kablam! 
Aug 30 00:51:26.755 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 30 00:51:26.761 INFO kablam! error: Could not compile `cortex-m`.
Aug 30 00:51:26.761 INFO kablam! 
Aug 30 00:51:26.761 INFO kablam! To learn more, run the command again with --verbose.
Aug 30 00:51:26.762 INFO kablam! su: No module specific data is present
Aug 30 00:51:27.165 INFO running `"docker" "rm" "-f" "3b48c8b80b512edef8fbc79acb3a8da015b8787bf0a465b998f9fc7b2ffb53df"`
Aug 30 00:51:27.292 INFO blam! 3b48c8b80b512edef8fbc79acb3a8da015b8787bf0a465b998f9fc7b2ffb53df