Aug 01 19:41:03.101 INFO checking un_algebra-0.1.0 against 1.27.2 for lazy_static-1
Aug 01 19:41:03.101 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 19:41:03.101 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 19:41:03.101 INFO running `"docker" "create" "-v" "/tmp/crater.L4wTh3ICr1PA:/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 19:41:03.288 INFO blam! 7ff4624e259375a575dc6c060ac451ed59decd30c04bf497c3b59d998f4b3a6e
Aug 01 19:41:03.290 INFO running `"docker" "start" "-a" "7ff4624e259375a575dc6c060ac451ed59decd30c04bf497c3b59d998f4b3a6e"`
Aug 01 19:41:04.639 INFO kablam!     Checking rand v0.5.4
Aug 01 19:41:04.639 INFO kablam!     Checking bit-set v0.5.0
Aug 01 19:41:04.640 INFO kablam!     Checking float-cmp v0.4.0
Aug 01 19:41:09.969 INFO kablam!     Checking tempfile v3.0.3
Aug 01 19:41:10.747 INFO kablam!     Checking rusty-fork v0.2.0
Aug 01 19:41:11.533 INFO kablam!     Checking proptest v0.8.4
Aug 01 19:41:26.940 INFO kablam!     Checking un_algebra v0.1.0 (file:///source)
Aug 01 19:41:27.723 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 19:41:27.723 INFO kablam!  --> src/lib.rs:1:1
Aug 01 19:41:27.723 INFO kablam!   |
Aug 01 19:41:27.723 INFO kablam! 1 | #![feature(external_doc)]
Aug 01 19:41:27.723 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 19:41:27.724 INFO kablam! 
Aug 01 19:41:27.737 INFO kablam! error: aborting due to previous error
Aug 01 19:41:27.737 INFO kablam! 
Aug 01 19:41:27.738 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 19:41:27.747 INFO kablam! error: Could not compile `un_algebra`.
Aug 01 19:41:27.747 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 19:41:28.327 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 19:41:28.327 INFO kablam!  --> src/lib.rs:1:1
Aug 01 19:41:28.327 INFO kablam!   |
Aug 01 19:41:28.327 INFO kablam! 1 | #![feature(external_doc)]
Aug 01 19:41:28.327 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 19:41:28.327 INFO kablam! 
Aug 01 19:41:28.351 INFO kablam! error: aborting due to previous error
Aug 01 19:41:28.351 INFO kablam! 
Aug 01 19:41:28.351 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 19:41:28.366 INFO kablam! error: Could not compile `un_algebra`.
Aug 01 19:41:28.366 INFO kablam! 
Aug 01 19:41:28.366 INFO kablam! To learn more, run the command again with --verbose.
Aug 01 19:41:28.368 INFO kablam! su: No module specific data is present
Aug 01 19:41:29.029 INFO running `"docker" "rm" "-f" "7ff4624e259375a575dc6c060ac451ed59decd30c04bf497c3b59d998f4b3a6e"`
Aug 01 19:41:29.154 INFO blam! 7ff4624e259375a575dc6c060ac451ed59decd30c04bf497c3b59d998f4b3a6e