Aug 02 05:04:48.508 INFO checking lmdb-0.7.2 against 1.27.2+tmplazy for lazy_static-1
Aug 02 05:04:48.508 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 05:04:48.509 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 05:04:48.509 INFO running `"docker" "create" "-v" "/tmp/crater.TyFeb2pK74lG:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-3/1.27.2+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 05:04:48.810 INFO blam! d596a8476da11fdffa31c599f9869efb7c4e656e3f97c59df19034a313162f7c
Aug 02 05:04:48.813 INFO running `"docker" "start" "-a" "d596a8476da11fdffa31c599f9869efb7c4e656e3f97c59df19034a313162f7c"`
Aug 02 05:04:50.100 INFO kablam!     Checking lmdb v0.7.2 (file:///source)
Aug 02 05:04:51.181 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 05:04:51.182 INFO kablam!  --> src/lib.rs:4:19
Aug 02 05:04:51.182 INFO kablam!   |
Aug 02 05:04:51.182 INFO kablam! 4 | #![cfg_attr(test, feature(test))]
Aug 02 05:04:51.182 INFO kablam!   |                   ^^^^^^^^^^^^^^
Aug 02 05:04:51.182 INFO kablam! 
Aug 02 05:04:51.197 INFO kablam! error: aborting due to previous error
Aug 02 05:04:51.197 INFO kablam! 
Aug 02 05:04:51.198 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 05:04:51.207 INFO kablam! error: Could not compile `lmdb`.
Aug 02 05:04:51.207 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 05:04:52.014 INFO kablam! error: build failed
Aug 02 05:04:52.016 INFO kablam! su: No module specific data is present
Aug 02 05:04:52.646 INFO running `"docker" "rm" "-f" "d596a8476da11fdffa31c599f9869efb7c4e656e3f97c59df19034a313162f7c"`
Aug 02 05:04:52.813 INFO blam! d596a8476da11fdffa31c599f9869efb7c4e656e3f97c59df19034a313162f7c