Aug 02 10:04:15.954 INFO checking fixed_circular_buffer-0.2.2 against 1.27.2+tmplazy for lazy_static-1
Aug 02 10:04:15.954 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 10:04:15.954 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 10:04:15.954 INFO running `"docker" "create" "-v" "/tmp/crater.HrgWp1WrCkiS:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-6/1.27.2+tmplazy:/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 10:04:16.271 INFO blam! fc3327b91a7d6c33928a458aff21e8ef4e48e66e840dbe989a90c556c7b63dcc
Aug 02 10:04:16.273 INFO running `"docker" "start" "-a" "fc3327b91a7d6c33928a458aff21e8ef4e48e66e840dbe989a90c556c7b63dcc"`
Aug 02 10:04:17.230 INFO kablam!     Checking fixed_circular_buffer v0.2.2 (file:///source)
Aug 02 10:04:17.537 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 10:04:17.537 INFO kablam!  --> src/lib.rs:1:1
Aug 02 10:04:17.537 INFO kablam!   |
Aug 02 10:04:17.537 INFO kablam! 1 | #![feature(core)]
Aug 02 10:04:17.537 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 10:04:17.537 INFO kablam! 
Aug 02 10:04:17.537 INFO kablam! error: aborting due to previous error
Aug 02 10:04:17.537 INFO kablam! 
Aug 02 10:04:17.537 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 10:04:17.544 INFO kablam! error: Could not compile `fixed_circular_buffer`.
Aug 02 10:04:17.545 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 10:04:17.624 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 10:04:17.624 INFO kablam!  --> src/lib.rs:1:1
Aug 02 10:04:17.624 INFO kablam!   |
Aug 02 10:04:17.624 INFO kablam! 1 | #![feature(core)]
Aug 02 10:04:17.624 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 10:04:17.624 INFO kablam! 
Aug 02 10:04:17.627 INFO kablam! error: aborting due to previous error
Aug 02 10:04:17.627 INFO kablam! 
Aug 02 10:04:17.627 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 10:04:17.633 INFO kablam! error: Could not compile `fixed_circular_buffer`.
Aug 02 10:04:17.633 INFO kablam! 
Aug 02 10:04:17.633 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 10:04:17.635 INFO kablam! su: No module specific data is present
Aug 02 10:04:18.143 INFO running `"docker" "rm" "-f" "fc3327b91a7d6c33928a458aff21e8ef4e48e66e840dbe989a90c556c7b63dcc"`
Aug 02 10:04:18.273 INFO blam! fc3327b91a7d6c33928a458aff21e8ef4e48e66e840dbe989a90c556c7b63dcc