Aug 02 03:32:27.089 INFO checking nix-test-0.0.1 against 1.27.2+tmplazy for lazy_static-1
Aug 02 03:32:27.089 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:32:27.089 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:32:27.089 INFO running `"docker" "create" "-v" "/tmp/crater.OBbWvmEAdMwN:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-6/1.27.2+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 03:32:27.299 INFO blam! e86f05ef454138ab51f3f457bc441d235a38aefaa9ea5f11a0dda3008c1983ea
Aug 02 03:32:27.302 INFO running `"docker" "start" "-a" "e86f05ef454138ab51f3f457bc441d235a38aefaa9ea5f11a0dda3008c1983ea"`
Aug 02 03:32:28.202 INFO kablam!    Compiling nix-test v0.0.1 (file:///source)
Aug 02 03:32:28.498 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 03:32:28.498 INFO kablam!  --> build.rs:1:1
Aug 02 03:32:28.498 INFO kablam!   |
Aug 02 03:32:28.498 INFO kablam! 1 | #![feature(env, process)]
Aug 02 03:32:28.499 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 03:32:28.499 INFO kablam! 
Aug 02 03:32:28.499 INFO kablam! error: aborting due to previous error
Aug 02 03:32:28.499 INFO kablam! 
Aug 02 03:32:28.500 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 03:32:28.507 INFO kablam! error: Could not compile `nix-test`.
Aug 02 03:32:28.507 INFO kablam! 
Aug 02 03:32:28.507 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 03:32:28.508 INFO kablam! su: No module specific data is present
Aug 02 03:32:29.254 INFO running `"docker" "rm" "-f" "e86f05ef454138ab51f3f457bc441d235a38aefaa9ea5f11a0dda3008c1983ea"`
Aug 02 03:32:29.438 INFO blam! e86f05ef454138ab51f3f457bc441d235a38aefaa9ea5f11a0dda3008c1983ea