Sep 19 16:52:36.622 INFO checking tm4c123x-0.4.0 against master#ff6422d7a392acfc8af28994d65af2bbaecea4f6 for pr-54346
Sep 19 16:52:36.622 INFO running: cargo +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets
Sep 19 16:52:36.622 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-54346/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54346/worker-1/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/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 +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 19 16:52:37.084 INFO blam! 4d4cf2c5286afccdb3fe2029f8c65d1cd214919734a7e8679010aa6443babdd0
Sep 19 16:52:37.086 INFO running `"docker" "start" "-a" "4d4cf2c5286afccdb3fe2029f8c65d1cd214919734a7e8679010aa6443babdd0"`
Sep 19 16:52:39.471 INFO kablam! usermod: no changes
Sep 19 16:52:39.547 INFO kablam!    Compiling cortex-m v0.2.12
Sep 19 16:52:39.559 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Sep 19 16:52:41.346 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 19 16:52:41.346 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Sep 19 16:52:41.347 INFO kablam!    |
Sep 19 16:52:41.347 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Sep 19 16:52:41.348 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Sep 19 16:52:41.348 INFO kablam! 
Sep 19 16:52:41.364 INFO kablam! error: aborting due to previous error
Sep 19 16:52:41.364 INFO kablam! 
Sep 19 16:52:41.365 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 19 16:52:41.373 INFO kablam! error: Could not compile `cortex-m`.
Sep 19 16:52:41.374 INFO kablam! 
Sep 19 16:52:41.374 INFO kablam! To learn more, run the command again with --verbose.
Sep 19 16:52:41.376 INFO kablam! su: No module specific data is present
Sep 19 16:52:42.608 INFO running `"docker" "rm" "-f" "4d4cf2c5286afccdb3fe2029f8c65d1cd214919734a7e8679010aa6443babdd0"`
Sep 19 16:52:42.951 INFO blam! 4d4cf2c5286afccdb3fe2029f8c65d1cd214919734a7e8679010aa6443babdd0