Aug 02 10:28:59.225 INFO checking exponential-decay-histogram-0.1.1 against 1.27.2 for lazy_static-1
Aug 02 10:28:59.225 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 10:28:59.225 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 10:28:59.226 INFO running `"docker" "create" "-v" "/tmp/crater.qME9nZFldOFc:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-2/1.27.2:/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 10:28:59.498 INFO blam! 3b45be6f702c0a49114e7690666c65f56c33e7462ef8a31ff169d5af541c45e5
Aug 02 10:28:59.500 INFO running `"docker" "start" "-a" "3b45be6f702c0a49114e7690666c65f56c33e7462ef8a31ff169d5af541c45e5"`
Aug 02 10:29:00.644 INFO kablam!     Checking exponential-decay-histogram v0.1.1 (file:///source)
Aug 02 10:29:02.104 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 10:29:02.104 INFO kablam!  --> benches/bench.rs:1:1
Aug 02 10:29:02.104 INFO kablam!   |
Aug 02 10:29:02.105 INFO kablam! 1 | #![feature(test)]
Aug 02 10:29:02.105 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 10:29:02.105 INFO kablam! 
Aug 02 10:29:02.105 INFO kablam! error: aborting due to previous error
Aug 02 10:29:02.105 INFO kablam! 
Aug 02 10:29:02.105 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 10:29:02.105 INFO kablam! error: Could not compile `exponential-decay-histogram`.
Aug 02 10:29:02.105 INFO kablam! 
Aug 02 10:29:02.105 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 10:29:02.108 INFO kablam! su: No module specific data is present
Aug 02 10:29:02.628 INFO running `"docker" "rm" "-f" "3b45be6f702c0a49114e7690666c65f56c33e7462ef8a31ff169d5af541c45e5"`
Aug 02 10:29:02.743 INFO blam! 3b45be6f702c0a49114e7690666c65f56c33e7462ef8a31ff169d5af541c45e5