Aug 31 12:35:33.186 INFO checking stm32f0xx-0.3.0 against master#d0d81b7fc1421859ba0218e8a437af29ae3b0967 for pr-53578
Aug 31 12:35:33.186 INFO running: cargo +d0d81b7fc1421859ba0218e8a437af29ae3b0967-alt check --frozen --all --all-targets
Aug 31 12:35:33.186 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53578/master#d0d81b7fc1421859ba0218e8a437af29ae3b0967:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578/worker-0/master#d0d81b7fc1421859ba0218e8a437af29ae3b0967:/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 +d0d81b7fc1421859ba0218e8a437af29ae3b0967-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 31 12:35:33.416 INFO blam! 6fd25aef045183765dc92bac4eb33f05d0585ecc29909393a6a8cfc6ad37bda3
Aug 31 12:35:33.417 INFO running `"docker" "start" "-a" "6fd25aef045183765dc92bac4eb33f05d0585ecc29909393a6a8cfc6ad37bda3"`
Aug 31 12:35:34.134 INFO kablam!    Compiling cortex-m v0.2.12
Aug 31 12:35:34.135 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Aug 31 12:35:35.741 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 31 12:35:35.741 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Aug 31 12:35:35.741 INFO kablam!    |
Aug 31 12:35:35.741 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Aug 31 12:35:35.742 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Aug 31 12:35:35.742 INFO kablam! 
Aug 31 12:35:35.762 INFO kablam! error: aborting due to previous error
Aug 31 12:35:35.763 INFO kablam! 
Aug 31 12:35:35.763 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 31 12:35:35.769 INFO kablam! error: Could not compile `cortex-m`.
Aug 31 12:35:35.769 INFO kablam! 
Aug 31 12:35:35.769 INFO kablam! To learn more, run the command again with --verbose.
Aug 31 12:35:35.771 INFO kablam! su: No module specific data is present
Aug 31 12:35:36.150 INFO running `"docker" "rm" "-f" "6fd25aef045183765dc92bac4eb33f05d0585ecc29909393a6a8cfc6ad37bda3"`
Aug 31 12:35:36.301 INFO blam! 6fd25aef045183765dc92bac4eb33f05d0585ecc29909393a6a8cfc6ad37bda3