Aug 02 12:27:07.465 INFO checking constant_time_eq-0.1.3 against 1.27.2 for lazy_static-1
Aug 02 12:27:07.465 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:27:07.465 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:27:07.465 INFO running `"docker" "create" "-v" "/tmp/crater.3cigDebDNMGT:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-7/1.27.2:/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 12:27:07.765 INFO blam! d3e1916bc08c9f83b0a53e4c5e546a241217b5054b019c3a8b2964a5cc603a8e
Aug 02 12:27:07.770 INFO running `"docker" "start" "-a" "d3e1916bc08c9f83b0a53e4c5e546a241217b5054b019c3a8b2964a5cc603a8e"`
Aug 02 12:27:09.074 INFO kablam!     Checking constant_time_eq v0.1.3 (file:///source)
Aug 02 12:27:10.620 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 12:27:10.620 INFO kablam!  --> benches/bench.rs:1:1
Aug 02 12:27:10.620 INFO kablam!   |
Aug 02 12:27:10.620 INFO kablam! 1 | #![feature(test)]
Aug 02 12:27:10.620 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 12:27:10.620 INFO kablam! 
Aug 02 12:27:10.620 INFO kablam! error: aborting due to previous error
Aug 02 12:27:10.620 INFO kablam! 
Aug 02 12:27:10.621 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 12:27:10.628 INFO kablam! error: Could not compile `constant_time_eq`.
Aug 02 12:27:10.628 INFO kablam! 
Aug 02 12:27:10.628 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 12:27:10.629 INFO kablam! su: No module specific data is present
Aug 02 12:27:11.521 INFO running `"docker" "rm" "-f" "d3e1916bc08c9f83b0a53e4c5e546a241217b5054b019c3a8b2964a5cc603a8e"`
Aug 02 12:27:11.671 INFO blam! d3e1916bc08c9f83b0a53e4c5e546a241217b5054b019c3a8b2964a5cc603a8e