Aug 02 03:48:11.892 INFO checking nb-sync-0.2.0 against 1.27.2 for lazy_static-1
Aug 02 03:48:11.892 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:48:11.892 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:48:11.892 INFO running `"docker" "create" "-v" "/tmp/crater.fiUWty622wk1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-5/1.27.2:/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 +1.27.2 check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Aug 02 03:48:12.125 INFO blam! 4f97029ffa57d95a21ebc64223541c636337c6c21a08fe4ea5e51fa7c799ac78
Aug 02 03:48:12.128 INFO running `"docker" "start" "-a" "4f97029ffa57d95a21ebc64223541c636337c6c21a08fe4ea5e51fa7c799ac78"`
Aug 02 03:48:12.909 INFO kablam!     Checking nb-sync v0.2.0 (file:///source)
Aug 02 03:48:13.397 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 03:48:13.397 INFO kablam!    --> src/lib.rs:134:1
Aug 02 03:48:13.398 INFO kablam!     |
Aug 02 03:48:13.398 INFO kablam! 134 | #![feature(const_fn)]
Aug 02 03:48:13.398 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^
Aug 02 03:48:13.398 INFO kablam! 
Aug 02 03:48:13.398 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 03:48:13.398 INFO kablam!    --> src/lib.rs:135:1
Aug 02 03:48:13.398 INFO kablam!     |
Aug 02 03:48:13.398 INFO kablam! 135 | #![feature(optin_builtin_traits)]
Aug 02 03:48:13.398 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 03:48:13.398 INFO kablam! 
Aug 02 03:48:13.398 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 03:48:13.398 INFO kablam!    --> src/lib.rs:136:1
Aug 02 03:48:13.398 INFO kablam!     |
Aug 02 03:48:13.398 INFO kablam! 136 | #![feature(never_type)]
Aug 02 03:48:13.398 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 03:48:13.398 INFO kablam! 
Aug 02 03:48:13.400 INFO kablam! error: aborting due to 3 previous errors
Aug 02 03:48:13.400 INFO kablam! 
Aug 02 03:48:13.400 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 03:48:13.421 INFO kablam! error: Could not compile `nb-sync`.
Aug 02 03:48:13.421 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 03:48:13.668 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 03:48:13.668 INFO kablam!    --> src/lib.rs:134:1
Aug 02 03:48:13.668 INFO kablam!     |
Aug 02 03:48:13.668 INFO kablam! 134 | #![feature(const_fn)]
Aug 02 03:48:13.668 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^
Aug 02 03:48:13.669 INFO kablam! 
Aug 02 03:48:13.669 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 03:48:13.669 INFO kablam!    --> src/lib.rs:135:1
Aug 02 03:48:13.669 INFO kablam!     |
Aug 02 03:48:13.669 INFO kablam! 135 | #![feature(optin_builtin_traits)]
Aug 02 03:48:13.669 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 03:48:13.669 INFO kablam! 
Aug 02 03:48:13.669 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 03:48:13.669 INFO kablam!    --> src/lib.rs:136:1
Aug 02 03:48:13.669 INFO kablam!     |
Aug 02 03:48:13.669 INFO kablam! 136 | #![feature(never_type)]
Aug 02 03:48:13.669 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 03:48:13.670 INFO kablam! 
Aug 02 03:48:13.671 INFO kablam! error: aborting due to 3 previous errors
Aug 02 03:48:13.671 INFO kablam! 
Aug 02 03:48:13.671 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 03:48:13.678 INFO kablam! error: Could not compile `nb-sync`.
Aug 02 03:48:13.678 INFO kablam! 
Aug 02 03:48:13.679 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 03:48:13.680 INFO kablam! su: No module specific data is present
Aug 02 03:48:14.256 INFO running `"docker" "rm" "-f" "4f97029ffa57d95a21ebc64223541c636337c6c21a08fe4ea5e51fa7c799ac78"`
Aug 02 03:48:14.407 INFO blam! 4f97029ffa57d95a21ebc64223541c636337c6c21a08fe4ea5e51fa7c799ac78