Aug 02 06:23:26.333 INFO checking itoa-0.3.4 against 1.27.2 for lazy_static-1
Aug 02 06:23:26.333 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:23:26.333 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:23:26.333 INFO running `"docker" "create" "-v" "/tmp/crater.7hEPQztZaOOY:/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 06:23:26.524 INFO blam! fd8417b288fede88947ff5f4b0e459abfff3c7eba946cbd913869cdce9c8614d
Aug 02 06:23:26.531 INFO running `"docker" "start" "-a" "fd8417b288fede88947ff5f4b0e459abfff3c7eba946cbd913869cdce9c8614d"`
Aug 02 06:23:27.353 INFO kablam!     Checking itoa v0.3.4 (file:///source)
Aug 02 06:23:28.592 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 06:23:28.592 INFO kablam!  --> benches/bench.rs:5:1
Aug 02 06:23:28.592 INFO kablam!   |
Aug 02 06:23:28.592 INFO kablam! 5 | #![feature(test)]
Aug 02 06:23:28.592 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 06:23:28.592 INFO kablam! 
Aug 02 06:23:28.593 INFO kablam! error: aborting due to previous error
Aug 02 06:23:28.593 INFO kablam! 
Aug 02 06:23:28.593 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 06:23:28.600 INFO kablam! error: Could not compile `itoa`.
Aug 02 06:23:28.600 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 06:23:28.733 INFO kablam! error: build failed
Aug 02 06:23:28.734 INFO kablam! su: No module specific data is present
Aug 02 06:23:29.422 INFO running `"docker" "rm" "-f" "fd8417b288fede88947ff5f4b0e459abfff3c7eba946cbd913869cdce9c8614d"`
Aug 02 06:23:29.556 INFO blam! fd8417b288fede88947ff5f4b0e459abfff3c7eba946cbd913869cdce9c8614d