Aug 11 01:10:25.881 INFO checking ssd1351-0.1.0 against master#f6d43ed84207c7e58f363f46e5a438ff40f2b311 for libc-1
Aug 11 01:10:25.881 INFO running: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 01:10:25.881 INFO creating container for: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 01:10:25.881 INFO running `"docker" "create" "-v" "/tmp/crater.mIicVf1hAHXd:/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 01:10:26.110 INFO blam! 5f5e27e1eb2dba11e3466f8d64cd3fd4b19c1a8db6d89f11d9ba994d8067c3cd
Aug 11 01:10:26.113 INFO running `"docker" "start" "-a" "5f5e27e1eb2dba11e3466f8d64cd3fd4b19c1a8db6d89f11d9ba994d8067c3cd"`
Aug 11 01:10:26.993 INFO kablam!    Compiling cc v1.0.18
Aug 11 01:10:26.993 INFO kablam!    Compiling typenum v1.10.0
Aug 11 01:10:26.993 INFO kablam!     Checking bare-metal v0.2.1
Aug 11 01:10:26.993 INFO kablam!    Compiling stm32l4 v0.2.2
Aug 11 01:10:26.993 INFO kablam!     Checking aligned v0.2.0
Aug 11 01:10:26.996 INFO kablam!     Checking void v1.0.2
Aug 11 01:10:26.996 INFO kablam!     Checking nb v0.1.1
Aug 11 01:10:26.996 INFO kablam!     Checking byteorder v1.2.4
Aug 11 01:10:27.786 INFO kablam!     Checking cast v0.2.2
Aug 11 01:10:27.854 INFO kablam!     Checking embedded-graphics v0.3.0
Aug 11 01:10:28.070 INFO kablam!     Checking volatile-register v0.2.0
Aug 11 01:10:28.356 INFO kablam!     Checking embedded-hal v0.2.1
Aug 11 01:10:31.946 INFO kablam!     Checking hash32 v0.1.0
Aug 11 01:10:32.435 INFO kablam!     Checking ssd1351 v0.1.0 (file:///source)
Aug 11 01:10:39.357 INFO kablam!     Checking generic-array v0.11.1
Aug 11 01:10:41.224 INFO kablam!     Checking heapless v0.3.6
Aug 11 01:10:43.092 INFO kablam!    Compiling cortex-m-rt v0.5.1
Aug 11 01:10:43.094 INFO kablam!    Compiling cortex-m v0.5.3
Aug 11 01:10:43.096 INFO kablam!    Compiling cortex-m-semihosting v0.3.0
Aug 11 01:10:44.467 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Aug 11 01:10:44.467 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/heapless-0.3.6/src/__core.rs:43:9
Aug 11 01:10:44.467 INFO kablam!    |
Aug 11 01:10:44.467 INFO kablam! 43 |         U { none: () }.some
Aug 11 01:10:44.467 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^
Aug 11 01:10:44.467 INFO kablam!    |
Aug 11 01:10:44.467 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Aug 11 01:10:44.467 INFO kablam! 
Aug 11 01:10:44.484 INFO kablam! error: aborting due to previous error
Aug 11 01:10:44.484 INFO kablam! 
Aug 11 01:10:44.484 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 11 01:10:44.505 INFO kablam! error: Could not compile `heapless`.
Aug 11 01:10:44.506 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 01:10:45.063 INFO kablam! error: build failed
Aug 11 01:10:45.063 INFO kablam! su: No module specific data is present
Aug 11 01:10:45.553 INFO running `"docker" "rm" "-f" "5f5e27e1eb2dba11e3466f8d64cd3fd4b19c1a8db6d89f11d9ba994d8067c3cd"`
Aug 11 01:10:45.692 INFO blam! 5f5e27e1eb2dba11e3466f8d64cd3fd4b19c1a8db6d89f11d9ba994d8067c3cd