Sep 14 07:37:09.514 INFO checking tm4c123x-0.4.0 against master#90d36fb5905bbe5004f5b465ea14b53d10dae260 for pr-53578-1
Sep 14 07:37:09.514 INFO running: cargo +90d36fb5905bbe5004f5b465ea14b53d10dae260-alt check --frozen --all --all-targets
Sep 14 07:37:09.514 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53578-1/master#90d36fb5905bbe5004f5b465ea14b53d10dae260:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578-1/worker-1/master#90d36fb5905bbe5004f5b465ea14b53d10dae260:/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 +90d36fb5905bbe5004f5b465ea14b53d10dae260-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 14 07:37:09.912 INFO blam! c064d7f381e0db9ce6fc3bf563d2f87357caead8ff039adbb37462ed09bc4f49
Sep 14 07:37:09.913 INFO running `"docker" "start" "-a" "c064d7f381e0db9ce6fc3bf563d2f87357caead8ff039adbb37462ed09bc4f49"`
Sep 14 07:37:12.766 INFO kablam! usermod: no changes
Sep 14 07:37:12.839 INFO kablam!    Compiling cortex-m v0.2.12
Sep 14 07:37:12.851 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Sep 14 07:37:14.300 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 14 07:37:14.300 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Sep 14 07:37:14.300 INFO kablam!    |
Sep 14 07:37:14.300 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Sep 14 07:37:14.300 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Sep 14 07:37:14.300 INFO kablam! 
Sep 14 07:37:14.315 INFO kablam! error: aborting due to previous error
Sep 14 07:37:14.315 INFO kablam! 
Sep 14 07:37:14.316 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 14 07:37:14.323 INFO kablam! error: Could not compile `cortex-m`.
Sep 14 07:37:14.324 INFO kablam! 
Sep 14 07:37:14.324 INFO kablam! To learn more, run the command again with --verbose.
Sep 14 07:37:14.326 INFO kablam! su: No module specific data is present
Sep 14 07:37:15.870 INFO running `"docker" "rm" "-f" "c064d7f381e0db9ce6fc3bf563d2f87357caead8ff039adbb37462ed09bc4f49"`
Sep 14 07:37:16.164 INFO blam! c064d7f381e0db9ce6fc3bf563d2f87357caead8ff039adbb37462ed09bc4f49