Sep 19 18:54:57.553 INFO checking tm4c123x-0.4.0 against master#1e21c9a297a9fe668d62887a3a6a4add8e717b17 for pr-54352
Sep 19 18:54:57.553 INFO running: cargo +1e21c9a297a9fe668d62887a3a6a4add8e717b17-alt check --frozen --all --all-targets
Sep 19 18:54:57.553 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-7/pr-54352/master#1e21c9a297a9fe668d62887a3a6a4add8e717b17:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54352/worker-7/master#1e21c9a297a9fe668d62887a3a6a4add8e717b17:/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 +1e21c9a297a9fe668d62887a3a6a4add8e717b17-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 19 18:54:57.989 INFO blam! 7da213825825a33470e1c23ccc0b49909b1da24453acd9402e1ffaefa7f53c7f
Sep 19 18:54:57.991 INFO running `"docker" "start" "-a" "7da213825825a33470e1c23ccc0b49909b1da24453acd9402e1ffaefa7f53c7f"`
Sep 19 18:54:59.797 INFO kablam! usermod: no changes
Sep 19 18:54:59.910 INFO kablam!    Compiling cortex-m v0.2.12
Sep 19 18:54:59.910 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Sep 19 18:55:01.434 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 19 18:55:01.434 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Sep 19 18:55:01.434 INFO kablam!    |
Sep 19 18:55:01.434 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Sep 19 18:55:01.434 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Sep 19 18:55:01.434 INFO kablam! 
Sep 19 18:55:01.446 INFO kablam! error: aborting due to previous error
Sep 19 18:55:01.446 INFO kablam! 
Sep 19 18:55:01.446 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 19 18:55:01.464 INFO kablam! error: Could not compile `cortex-m`.
Sep 19 18:55:01.464 INFO kablam! 
Sep 19 18:55:01.464 INFO kablam! To learn more, run the command again with --verbose.
Sep 19 18:55:01.465 INFO kablam! su: No module specific data is present
Sep 19 18:55:03.248 INFO running `"docker" "rm" "-f" "7da213825825a33470e1c23ccc0b49909b1da24453acd9402e1ffaefa7f53c7f"`
Sep 19 18:55:03.368 INFO blam! 7da213825825a33470e1c23ccc0b49909b1da24453acd9402e1ffaefa7f53c7f