Aug 02 06:23:23.018 INFO checking itoa-0.4.2 against 1.27.2 for lazy_static-1
Aug 02 06:23:23.018 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:23:23.018 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:23:23.018 INFO running `"docker" "create" "-v" "/tmp/crater.E7AHF68A5BhD:/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 06:23:23.173 INFO blam! 0cc4861ed95c03ad4311d024f2032996318ca7db287aaca4f168b4f9a05b1064
Aug 02 06:23:23.175 INFO running `"docker" "start" "-a" "0cc4861ed95c03ad4311d024f2032996318ca7db287aaca4f168b4f9a05b1064"`
Aug 02 06:23:24.358 INFO kablam!     Checking itoa v0.4.2 (file:///source)
Aug 02 06:23:25.602 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 06:23:25.602 INFO kablam!  --> benches/bench.rs:5:1
Aug 02 06:23:25.603 INFO kablam!   |
Aug 02 06:23:25.603 INFO kablam! 5 | #![feature(test)]
Aug 02 06:23:25.603 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 06:23:25.603 INFO kablam! 
Aug 02 06:23:25.603 INFO kablam! error: aborting due to previous error
Aug 02 06:23:25.603 INFO kablam! 
Aug 02 06:23:25.603 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 06:23:25.609 INFO kablam! error: Could not compile `itoa`.
Aug 02 06:23:25.609 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 06:23:25.773 INFO kablam! error: build failed
Aug 02 06:23:25.774 INFO kablam! su: No module specific data is present
Aug 02 06:23:26.472 INFO running `"docker" "rm" "-f" "0cc4861ed95c03ad4311d024f2032996318ca7db287aaca4f168b4f9a05b1064"`
Aug 02 06:23:26.618 INFO blam! 0cc4861ed95c03ad4311d024f2032996318ca7db287aaca4f168b4f9a05b1064