Aug 01 21:14:31.763 INFO checking stream-vbyte-0.3.2 against 1.27.2 for lazy_static-1
Aug 01 21:14:31.763 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:14:31.763 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:14:31.763 INFO running `"docker" "create" "-v" "/tmp/crater.q5aMlx4u8f7q:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-7/1.27.2:/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 01 21:14:31.960 INFO blam! f4173932eec181a2fdaf19528eeed9823073166f3fbe85d0c8364f611c63df81
Aug 01 21:14:31.963 INFO running `"docker" "start" "-a" "f4173932eec181a2fdaf19528eeed9823073166f3fbe85d0c8364f611c63df81"`
Aug 01 21:14:32.982 INFO kablam!     Checking stream-vbyte v0.3.2 (file:///source)
Aug 01 21:14:35.018 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:14:35.018 INFO kablam!  --> benches/benchmarks.rs:1:1
Aug 01 21:14:35.018 INFO kablam!   |
Aug 01 21:14:35.018 INFO kablam! 1 | #![feature(test)]
Aug 01 21:14:35.019 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 21:14:35.019 INFO kablam! 
Aug 01 21:14:35.019 INFO kablam! error: aborting due to previous error
Aug 01 21:14:35.019 INFO kablam! 
Aug 01 21:14:35.019 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:14:35.044 INFO kablam! error: Could not compile `stream-vbyte`.
Aug 01 21:14:35.045 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 21:14:36.945 INFO kablam! error: build failed
Aug 01 21:14:36.947 INFO kablam! su: No module specific data is present
Aug 01 21:14:37.645 INFO running `"docker" "rm" "-f" "f4173932eec181a2fdaf19528eeed9823073166f3fbe85d0c8364f611c63df81"`
Aug 01 21:14:37.775 INFO blam! f4173932eec181a2fdaf19528eeed9823073166f3fbe85d0c8364f611c63df81