Aug 02 01:10:31.778 INFO checking recaman-0.1.0 against 1.27.2+tmplazy for lazy_static-1
Aug 02 01:10:31.778 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 01:10:31.778 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 01:10:31.778 INFO running `"docker" "create" "-v" "/tmp/crater.eLAzf5BkAwEp:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-7/1.27.2+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 01:10:31.976 INFO blam! b948958ed8fe019fee86dea7b3b1bc127a3049c41739c6c5978b630ef66f3b2b
Aug 02 01:10:31.978 INFO running `"docker" "start" "-a" "b948958ed8fe019fee86dea7b3b1bc127a3049c41739c6c5978b630ef66f3b2b"`
Aug 02 01:10:33.251 INFO kablam!     Checking recaman v0.1.0 (file:///source)
Aug 02 01:10:34.372 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 01:10:34.372 INFO kablam!  --> benches/recaman.rs:1:1
Aug 02 01:10:34.372 INFO kablam!   |
Aug 02 01:10:34.372 INFO kablam! 1 | #![feature(test)]
Aug 02 01:10:34.372 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 01:10:34.373 INFO kablam! 
Aug 02 01:10:34.373 INFO kablam! error: aborting due to previous error
Aug 02 01:10:34.373 INFO kablam! 
Aug 02 01:10:34.373 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 01:10:34.380 INFO kablam! error: Could not compile `recaman`.
Aug 02 01:10:34.380 INFO kablam! 
Aug 02 01:10:34.380 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 01:10:34.382 INFO kablam! su: No module specific data is present
Aug 02 01:10:34.890 INFO running `"docker" "rm" "-f" "b948958ed8fe019fee86dea7b3b1bc127a3049c41739c6c5978b630ef66f3b2b"`
Aug 02 01:10:35.054 INFO blam! b948958ed8fe019fee86dea7b3b1bc127a3049c41739c6c5978b630ef66f3b2b