Aug 02 09:46:55.863 INFO checking fragment-0.3.1 against 1.27.2 for lazy_static-1
Aug 02 09:46:55.864 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 09:46:55.864 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 09:46:55.864 INFO running `"docker" "create" "-v" "/tmp/crater.ugaJzQdKYq76:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-0/1.27.2:/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 09:46:56.038 INFO blam! 69cc69ced332a6db93201af2b92aba6d53f44e7a83f746ef8d9b48f7ec2e1899
Aug 02 09:46:56.040 INFO running `"docker" "start" "-a" "69cc69ced332a6db93201af2b92aba6d53f44e7a83f746ef8d9b48f7ec2e1899"`
Aug 02 09:46:57.918 INFO kablam!     Checking fragment v0.3.1 (file:///source)
Aug 02 09:46:58.740 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 09:46:58.740 INFO kablam!  --> benches/matching.rs:1:1
Aug 02 09:46:58.740 INFO kablam!   |
Aug 02 09:46:58.740 INFO kablam! 1 | #![feature(test)]
Aug 02 09:46:58.740 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 09:46:58.740 INFO kablam! 
Aug 02 09:46:58.740 INFO kablam! error: aborting due to previous error
Aug 02 09:46:58.740 INFO kablam! 
Aug 02 09:46:58.740 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 09:46:58.746 INFO kablam! error: Could not compile `fragment`.
Aug 02 09:46:58.746 INFO kablam! 
Aug 02 09:46:58.746 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 09:46:58.747 INFO kablam! su: No module specific data is present
Aug 02 09:46:59.340 INFO running `"docker" "rm" "-f" "69cc69ced332a6db93201af2b92aba6d53f44e7a83f746ef8d9b48f7ec2e1899"`
Aug 02 09:46:59.428 INFO blam! 69cc69ced332a6db93201af2b92aba6d53f44e7a83f746ef8d9b48f7ec2e1899