Aug 02 03:32:27.195 INFO checking nix-test-0.0.1 against 1.27.2 for lazy_static-1
Aug 02 03:32:27.195 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:32:27.196 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:32:27.196 INFO running `"docker" "create" "-v" "/tmp/crater.MtXzqm3Po9QZ:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-1/1.27.2:/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 03:32:27.463 INFO blam! 7510fbcbe26d9e7d35c76bf715e680a69eda1f454b72f713f9befac87c7e9f22
Aug 02 03:32:27.466 INFO running `"docker" "start" "-a" "7510fbcbe26d9e7d35c76bf715e680a69eda1f454b72f713f9befac87c7e9f22"`
Aug 02 03:32:29.001 INFO kablam!    Compiling nix-test v0.0.1 (file:///source)
Aug 02 03:32:29.421 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 03:32:29.421 INFO kablam!  --> build.rs:1:1
Aug 02 03:32:29.421 INFO kablam!   |
Aug 02 03:32:29.421 INFO kablam! 1 | #![feature(env, process)]
Aug 02 03:32:29.421 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 03:32:29.425 INFO kablam! 
Aug 02 03:32:29.425 INFO kablam! error: aborting due to previous error
Aug 02 03:32:29.425 INFO kablam! 
Aug 02 03:32:29.425 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 03:32:29.436 INFO kablam! error: Could not compile `nix-test`.
Aug 02 03:32:29.436 INFO kablam! 
Aug 02 03:32:29.437 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 03:32:29.438 INFO kablam! su: No module specific data is present
Aug 02 03:32:30.107 INFO running `"docker" "rm" "-f" "7510fbcbe26d9e7d35c76bf715e680a69eda1f454b72f713f9befac87c7e9f22"`
Aug 02 03:32:30.268 INFO blam! 7510fbcbe26d9e7d35c76bf715e680a69eda1f454b72f713f9befac87c7e9f22