Aug 02 01:36:51.434 INFO checking qecs-core-0.0.10 against 1.27.2 for lazy_static-1
Aug 02 01:36:51.434 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 01:36:51.434 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 01:36:51.434 INFO running `"docker" "create" "-v" "/tmp/crater.VNl5UW1X36MX:/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 01:36:51.696 INFO blam! 436fe24954aa12199a99e2e8be185b89e4f0c628fcce37711d665e79237a396c
Aug 02 01:36:51.697 INFO running `"docker" "start" "-a" "436fe24954aa12199a99e2e8be185b89e4f0c628fcce37711d665e79237a396c"`
Aug 02 01:36:52.625 INFO kablam!     Checking downcast v0.2.3
Aug 02 01:36:52.960 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 01:36:52.960 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/downcast-0.2.3/src/lib.rs:1:1
Aug 02 01:36:52.960 INFO kablam!   |
Aug 02 01:36:52.960 INFO kablam! 1 | #![feature(get_type_id)]
Aug 02 01:36:52.960 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 01:36:52.960 INFO kablam! 
Aug 02 01:36:52.960 INFO kablam! error: aborting due to previous error
Aug 02 01:36:52.960 INFO kablam! 
Aug 02 01:36:52.960 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 01:36:52.967 INFO kablam! error: Could not compile `downcast`.
Aug 02 01:36:52.968 INFO kablam! 
Aug 02 01:36:52.968 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 01:36:52.970 INFO kablam! su: No module specific data is present
Aug 02 01:36:53.682 INFO running `"docker" "rm" "-f" "436fe24954aa12199a99e2e8be185b89e4f0c628fcce37711d665e79237a396c"`
Aug 02 01:36:53.845 INFO blam! 436fe24954aa12199a99e2e8be185b89e4f0c628fcce37711d665e79237a396c