Aug 02 01:22:30.737 INFO checking random_choice-0.3.2 against 1.27.2+tmplazy for lazy_static-1
Aug 02 01:22:30.738 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 01:22:30.738 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 01:22:30.738 INFO running `"docker" "create" "-v" "/tmp/crater.17z3bN0Sh12x:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-1/1.27.2+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 01:22:30.984 INFO blam! 6dd150e680d0437a0cb1026b47833e33843d65665ab39ef8c6a67745c8015725
Aug 02 01:22:30.987 INFO running `"docker" "start" "-a" "6dd150e680d0437a0cb1026b47833e33843d65665ab39ef8c6a67745c8015725"`
Aug 02 01:22:32.515 INFO kablam!     Checking random_choice v0.3.2 (file:///source)
Aug 02 01:22:34.034 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 01:22:34.034 INFO kablam!  --> benches/lib.rs:1:19
Aug 02 01:22:34.034 INFO kablam!   |
Aug 02 01:22:34.035 INFO kablam! 1 | #![cfg_attr(test, feature(test))]
Aug 02 01:22:34.035 INFO kablam!   |                   ^^^^^^^^^^^^^^
Aug 02 01:22:34.035 INFO kablam! 
Aug 02 01:22:34.035 INFO kablam! error: aborting due to previous error
Aug 02 01:22:34.035 INFO kablam! 
Aug 02 01:22:34.035 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 01:22:34.043 INFO kablam! error: Could not compile `random_choice`.
Aug 02 01:22:34.043 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 01:22:34.294 INFO kablam! error: build failed
Aug 02 01:22:34.305 INFO kablam! su: No module specific data is present
Aug 02 01:22:35.099 INFO running `"docker" "rm" "-f" "6dd150e680d0437a0cb1026b47833e33843d65665ab39ef8c6a67745c8015725"`
Aug 02 01:22:35.275 INFO blam! 6dd150e680d0437a0cb1026b47833e33843d65665ab39ef8c6a67745c8015725