Aug 02 02:06:56.623 INFO checking polymap-0.3.0 against 1.27.2+tmplazy for lazy_static-1
Aug 02 02:06:56.623 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 02:06:56.623 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 02:06:56.623 INFO running `"docker" "create" "-v" "/tmp/crater.bB96EClXcvde:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-2/1.27.2+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 02:06:56.891 INFO blam! 6a2969aa330b36ffd9424d28546d4c03415dca4c0bb0364fd3c77a47571f4a2a
Aug 02 02:06:56.893 INFO running `"docker" "start" "-a" "6a2969aa330b36ffd9424d28546d4c03415dca4c0bb0364fd3c77a47571f4a2a"`
Aug 02 02:06:57.915 INFO kablam!     Checking polymap v0.3.0 (file:///source)
Aug 02 02:06:59.860 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 02:06:59.860 INFO kablam!  --> benches/polymap.rs:1:1
Aug 02 02:06:59.860 INFO kablam!   |
Aug 02 02:06:59.860 INFO kablam! 1 | #![feature(test)]
Aug 02 02:06:59.860 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 02:06:59.860 INFO kablam! 
Aug 02 02:06:59.860 INFO kablam! error: aborting due to previous error
Aug 02 02:06:59.860 INFO kablam! 
Aug 02 02:06:59.860 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 02:06:59.868 INFO kablam! error: Could not compile `polymap`.
Aug 02 02:06:59.869 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 02:07:00.009 INFO kablam! error: build failed
Aug 02 02:07:00.010 INFO kablam! su: No module specific data is present
Aug 02 02:07:00.743 INFO running `"docker" "rm" "-f" "6a2969aa330b36ffd9424d28546d4c03415dca4c0bb0364fd3c77a47571f4a2a"`
Aug 02 02:07:00.890 INFO blam! 6a2969aa330b36ffd9424d28546d4c03415dca4c0bb0364fd3c77a47571f4a2a