Aug 11 09:22:25.778 INFO checking lm4f120-0.10.0 against master#f6d43ed84207c7e58f363f46e5a438ff40f2b311 for libc-1
Aug 11 09:22:25.778 INFO running: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 09:22:25.778 INFO creating container for: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 09:22:25.778 INFO running `"docker" "create" "-v" "/tmp/crater.LnkrDxW5Klw5:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-1/master#f6d43ed84207c7e58f363f46e5a438ff40f2b311:/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" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 11 09:22:26.076 INFO blam! bcca25fe82f430ac69949a2b6d547ac52605837b31dd94ef44363d42690cd95e
Aug 11 09:22:26.079 INFO running `"docker" "start" "-a" "bcca25fe82f430ac69949a2b6d547ac52605837b31dd94ef44363d42690cd95e"`
Aug 11 09:22:27.613 INFO kablam!    Compiling cortex-m v0.4.3
Aug 11 09:22:27.614 INFO kablam!     Checking vcell v0.1.0
Aug 11 09:22:27.614 INFO kablam!     Checking bare-metal v0.1.2
Aug 11 09:22:27.617 INFO kablam!     Checking untagged-option v0.1.1
Aug 11 09:22:27.617 INFO kablam!     Checking aligned v0.1.2
Aug 11 09:22:27.617 INFO kablam!     Checking void v1.0.2
Aug 11 09:22:27.621 INFO kablam!     Checking spin v0.4.8
Aug 11 09:22:27.942 INFO kablam!     Checking nb v0.1.1
Aug 11 09:22:28.144 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 11 09:22:28.145 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:53
Aug 11 09:22:28.145 INFO kablam!   |
Aug 11 09:22:28.145 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 11 09:22:28.145 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Aug 11 09:22:28.145 INFO kablam! 
Aug 11 09:22:28.146 INFO kablam! error: aborting due to previous error
Aug 11 09:22:28.146 INFO kablam! 
Aug 11 09:22:28.146 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 09:22:28.152 INFO kablam! error: Could not compile `bare-metal`.
Aug 11 09:22:28.152 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 09:22:28.178 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 11 09:22:28.178 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:53
Aug 11 09:22:28.178 INFO kablam!   |
Aug 11 09:22:28.178 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 11 09:22:28.178 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Aug 11 09:22:28.178 INFO kablam! 
Aug 11 09:22:28.180 INFO kablam! error: aborting due to previous error
Aug 11 09:22:28.180 INFO kablam! 
Aug 11 09:22:28.180 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 09:22:28.187 INFO kablam! error: Could not compile `bare-metal`.
Aug 11 09:22:28.188 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 09:22:28.628 INFO kablam! error[E0635]: unknown feature `const_atomic_usize_new`
Aug 11 09:22:28.628 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.8/src/lib.rs:8:76
Aug 11 09:22:28.628 INFO kablam!   |
Aug 11 09:22:28.628 INFO kablam! 8 | #![cfg_attr(feature = "const_fn", feature(const_fn, const_unsafe_cell_new, const_atomic_usize_new))]
Aug 11 09:22:28.628 INFO kablam!   |                                                                            ^^^^^^^^^^^^^^^^^^^^^^
Aug 11 09:22:28.629 INFO kablam! 
Aug 11 09:22:28.629 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 11 09:22:28.629 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.8/src/lib.rs:8:53
Aug 11 09:22:28.629 INFO kablam!   |
Aug 11 09:22:28.629 INFO kablam! 8 | #![cfg_attr(feature = "const_fn", feature(const_fn, const_unsafe_cell_new, const_atomic_usize_new))]
Aug 11 09:22:28.629 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Aug 11 09:22:28.629 INFO kablam! 
Aug 11 09:22:28.650 INFO kablam! error[E0635]: unknown feature `const_atomic_usize_new`
Aug 11 09:22:28.650 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.8/src/lib.rs:8:76
Aug 11 09:22:28.650 INFO kablam!   |
Aug 11 09:22:28.650 INFO kablam! 8 | #![cfg_attr(feature = "const_fn", feature(const_fn, const_unsafe_cell_new, const_atomic_usize_new))]
Aug 11 09:22:28.650 INFO kablam!   |                                                                            ^^^^^^^^^^^^^^^^^^^^^^
Aug 11 09:22:28.650 INFO kablam! 
Aug 11 09:22:28.650 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 11 09:22:28.650 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.8/src/lib.rs:8:53
Aug 11 09:22:28.650 INFO kablam!   |
Aug 11 09:22:28.650 INFO kablam! 8 | #![cfg_attr(feature = "const_fn", feature(const_fn, const_unsafe_cell_new, const_atomic_usize_new))]
Aug 11 09:22:28.650 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Aug 11 09:22:28.650 INFO kablam! 
Aug 11 09:22:28.651 INFO kablam! error: aborting due to 2 previous errors
Aug 11 09:22:28.651 INFO kablam! 
Aug 11 09:22:28.651 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 09:22:28.658 INFO kablam! error: Could not compile `spin`.
Aug 11 09:22:28.658 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 09:22:28.671 INFO kablam! error: aborting due to 2 previous errors
Aug 11 09:22:28.671 INFO kablam! 
Aug 11 09:22:28.671 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 09:22:28.678 INFO kablam! error: Could not compile `spin`.
Aug 11 09:22:28.678 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 09:22:29.426 INFO kablam! error: build failed
Aug 11 09:22:29.433 INFO kablam! su: No module specific data is present
Aug 11 09:22:30.136 INFO running `"docker" "rm" "-f" "bcca25fe82f430ac69949a2b6d547ac52605837b31dd94ef44363d42690cd95e"`
Aug 11 09:22:30.354 INFO blam! bcca25fe82f430ac69949a2b6d547ac52605837b31dd94ef44363d42690cd95e