Aug 02 12:48:58.567 INFO checking claxon-0.3.1 against 1.27.2 for lazy_static-1
Aug 02 12:48:58.567 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:48:58.568 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:48:58.569 INFO running `"docker" "create" "-v" "/tmp/crater.2AcCG9j2IDVW:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-2/1.27.2:/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 12:48:58.819 INFO blam! 5b0ec75d224a380e57ab84607068751555497d2ba78ec289ad0df484bacf80dc
Aug 02 12:48:58.821 INFO running `"docker" "start" "-a" "5b0ec75d224a380e57ab84607068751555497d2ba78ec289ad0df484bacf80dc"`
Aug 02 12:48:59.928 INFO kablam!     Checking claxon v0.3.1 (file:///source)
Aug 02 12:49:04.984 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 12:49:04.985 INFO kablam!  --> benches/testsamples.rs:8:1
Aug 02 12:49:04.985 INFO kablam!   |
Aug 02 12:49:04.985 INFO kablam! 8 | #![feature(test)]
Aug 02 12:49:04.985 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 12:49:04.985 INFO kablam! 
Aug 02 12:49:04.986 INFO kablam! error: aborting due to previous error
Aug 02 12:49:04.986 INFO kablam! 
Aug 02 12:49:04.986 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 12:49:04.995 INFO kablam! error: Could not compile `claxon`.
Aug 02 12:49:04.995 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 12:49:05.680 INFO kablam! error: build failed
Aug 02 12:49:05.682 INFO kablam! su: No module specific data is present
Aug 02 12:49:06.263 INFO running `"docker" "rm" "-f" "5b0ec75d224a380e57ab84607068751555497d2ba78ec289ad0df484bacf80dc"`
Aug 02 12:49:06.401 INFO blam! 5b0ec75d224a380e57ab84607068751555497d2ba78ec289ad0df484bacf80dc