Aug 17 17:50:10.174 INFO checking lm4f120-0.9.1 against master#142bb27373126edf8367f526358b6c72ecf1d8df for pr-53426
Aug 17 17:50:10.174 INFO running: cargo +142bb27373126edf8367f526358b6c72ecf1d8df-alt check --frozen --all --all-targets
Aug 17 17:50:10.174 INFO creating container for: cargo +142bb27373126edf8367f526358b6c72ecf1d8df-alt check --frozen --all --all-targets
Aug 17 17:50:10.174 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-53426/master#142bb27373126edf8367f526358b6c72ecf1d8df:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53426/worker-6/master#142bb27373126edf8367f526358b6c72ecf1d8df:/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 +142bb27373126edf8367f526358b6c72ecf1d8df-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 17 17:50:10.414 INFO blam! 61cf381843fbaff9b900913ddab318f7568ca26a8b9a4752867872ac7038e1e7
Aug 17 17:50:10.417 INFO running `"docker" "start" "-a" "61cf381843fbaff9b900913ddab318f7568ca26a8b9a4752867872ac7038e1e7"`
Aug 17 17:50:11.341 INFO kablam!    Compiling cortex-m v0.4.3
Aug 17 17:50:11.344 INFO kablam!     Checking vcell v0.1.0
Aug 17 17:50:11.378 INFO kablam!     Checking nb v0.1.1
Aug 17 17:50:11.386 INFO kablam!     Checking bare-metal v0.1.2
Aug 17 17:50:11.393 INFO kablam!     Checking aligned v0.1.2
Aug 17 17:50:11.396 INFO kablam!     Checking untagged-option v0.1.1
Aug 17 17:50:11.413 INFO kablam!     Checking void v1.0.2
Aug 17 17:50:12.437 INFO kablam!     Checking spin v0.4.9
Aug 17 17:50:12.532 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 17 17:50:12.533 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:53
Aug 17 17:50:12.533 INFO kablam!   |
Aug 17 17:50:12.533 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 17 17:50:12.533 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Aug 17 17:50:12.578 INFO kablam! 
Aug 17 17:50:12.582 INFO kablam! error: aborting due to previous error
Aug 17 17:50:12.608 INFO kablam!     Checking volatile-register v0.2.0
Aug 17 17:50:12.608 INFO kablam! 
Aug 17 17:50:12.609 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 17 17:50:12.691 INFO kablam! error: Could not compile `bare-metal`.
Aug 17 17:50:12.691 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 17 17:50:12.760 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 17 17:50:12.760 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:53
Aug 17 17:50:12.760 INFO kablam!   |
Aug 17 17:50:12.760 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 17 17:50:12.760 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Aug 17 17:50:12.760 INFO kablam! 
Aug 17 17:50:12.766 INFO kablam! error: aborting due to previous error
Aug 17 17:50:12.766 INFO kablam! 
Aug 17 17:50:12.766 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 17 17:50:12.899 INFO kablam! error: Could not compile `bare-metal`.
Aug 17 17:50:12.899 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 17 17:50:15.545 INFO kablam! error: build failed
Aug 17 17:50:15.550 INFO kablam! su: No module specific data is present
Aug 17 17:50:16.119 INFO running `"docker" "rm" "-f" "61cf381843fbaff9b900913ddab318f7568ca26a8b9a4752867872ac7038e1e7"`
Aug 17 17:50:16.310 INFO blam! 61cf381843fbaff9b900913ddab318f7568ca26a8b9a4752867872ac7038e1e7