Sep 04 04:53:31.574 INFO checking rust-sort-0.1.4 against try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0 for pr-53893
Sep 04 04:53:31.574 INFO running: cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets
Sep 04 04:53:31.574 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53893/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-3/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/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" "-e" "USER_ID=500" "-e" "CMD=cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 04:53:31.749 INFO blam! 24e837428158e16dbfbdb31ada3af627d41d834336ef7b8c86fa5ece0226513e
Sep 04 04:53:31.757 INFO running `"docker" "start" "-a" "24e837428158e16dbfbdb31ada3af627d41d834336ef7b8c86fa5ece0226513e"`
Sep 04 04:53:32.547 INFO kablam!     Checking commandext v0.1.0
Sep 04 04:53:32.547 INFO kablam!     Checking rust-sort v0.1.4 (file:///source)
Sep 04 04:53:33.017 INFO kablam!     Checking utils v0.0.1
Sep 04 04:53:33.329 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 04 04:53:33.329 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:83:3
Sep 04 04:53:33.329 INFO kablam!    |
Sep 04 04:53:33.329 INFO kablam! 83 | #[experimental]
Sep 04 04:53:33.329 INFO kablam!    |   ^^^^^^^^^^^^
Sep 04 04:53:33.329 INFO kablam!    |
Sep 04 04:53:33.329 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 04:53:33.329 INFO kablam! 
Sep 04 04:53:33.329 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 04 04:53:33.329 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:77:3
Sep 04 04:53:33.329 INFO kablam!    |
Sep 04 04:53:33.329 INFO kablam! 77 | #[experimental]
Sep 04 04:53:33.329 INFO kablam!    |   ^^^^^^^^^^^^
Sep 04 04:53:33.329 INFO kablam!    |
Sep 04 04:53:33.329 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 04:53:33.330 INFO kablam! 
Sep 04 04:53:33.330 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 04 04:53:33.330 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:37:3
Sep 04 04:53:33.330 INFO kablam!    |
Sep 04 04:53:33.330 INFO kablam! 37 | #[experimental]
Sep 04 04:53:33.330 INFO kablam!    |   ^^^^^^^^^^^^
Sep 04 04:53:33.330 INFO kablam!    |
Sep 04 04:53:33.330 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 04:53:33.330 INFO kablam! 
Sep 04 04:53:33.330 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 04 04:53:33.330 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:29:3
Sep 04 04:53:33.330 INFO kablam!    |
Sep 04 04:53:33.330 INFO kablam! 29 | #[experimental]
Sep 04 04:53:33.330 INFO kablam!    |   ^^^^^^^^^^^^
Sep 04 04:53:33.330 INFO kablam!    |
Sep 04 04:53:33.330 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 04:53:33.330 INFO kablam! 
Sep 04 04:53:33.330 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 04 04:53:33.330 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:13:3
Sep 04 04:53:33.330 INFO kablam!    |
Sep 04 04:53:33.330 INFO kablam! 13 | #[experimental]
Sep 04 04:53:33.330 INFO kablam!    |   ^^^^^^^^^^^^
Sep 04 04:53:33.331 INFO kablam!    |
Sep 04 04:53:33.331 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 04:53:33.331 INFO kablam! 
Sep 04 04:53:33.331 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 04 04:53:33.331 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:63:3
Sep 04 04:53:33.331 INFO kablam!    |
Sep 04 04:53:33.331 INFO kablam! 63 | #[experimental]
Sep 04 04:53:33.331 INFO kablam!    |   ^^^^^^^^^^^^
Sep 04 04:53:33.331 INFO kablam!    |
Sep 04 04:53:33.331 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 04:53:33.331 INFO kablam! 
Sep 04 04:53:33.331 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 04 04:53:33.331 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:45:3
Sep 04 04:53:33.331 INFO kablam!    |
Sep 04 04:53:33.331 INFO kablam! 45 | #[experimental]
Sep 04 04:53:33.331 INFO kablam!    |   ^^^^^^^^^^^^
Sep 04 04:53:33.331 INFO kablam!    |
Sep 04 04:53:33.331 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 04:53:33.331 INFO kablam! 
Sep 04 04:53:33.332 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 04 04:53:33.332 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:37:3
Sep 04 04:53:33.332 INFO kablam!    |
Sep 04 04:53:33.332 INFO kablam! 37 | #[experimental]
Sep 04 04:53:33.332 INFO kablam!    |   ^^^^^^^^^^^^
Sep 04 04:53:33.332 INFO kablam!    |
Sep 04 04:53:33.332 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 04:53:33.332 INFO kablam! 
Sep 04 04:53:33.332 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 04 04:53:33.332 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:29:3
Sep 04 04:53:33.332 INFO kablam!    |
Sep 04 04:53:33.332 INFO kablam! 29 | #[experimental]
Sep 04 04:53:33.332 INFO kablam!    |   ^^^^^^^^^^^^
Sep 04 04:53:33.332 INFO kablam!    |
Sep 04 04:53:33.332 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 04:53:33.332 INFO kablam! 
Sep 04 04:53:33.332 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 04 04:53:33.332 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:21:3
Sep 04 04:53:33.332 INFO kablam!    |
Sep 04 04:53:33.332 INFO kablam! 21 | #[experimental]
Sep 04 04:53:33.333 INFO kablam!    |   ^^^^^^^^^^^^
Sep 04 04:53:33.333 INFO kablam!    |
Sep 04 04:53:33.333 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 04:53:33.333 INFO kablam! 
Sep 04 04:53:33.333 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 04 04:53:33.333 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:14:3
Sep 04 04:53:33.333 INFO kablam!    |
Sep 04 04:53:33.333 INFO kablam! 14 | #[experimental]
Sep 04 04:53:33.333 INFO kablam!    |   ^^^^^^^^^^^^
Sep 04 04:53:33.333 INFO kablam!    |
Sep 04 04:53:33.333 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 04 04:53:33.333 INFO kablam! 
Sep 04 04:53:33.333 INFO kablam! error: aborting due to 11 previous errors
Sep 04 04:53:33.333 INFO kablam! 
Sep 04 04:53:33.333 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 04 04:53:33.338 INFO kablam! error: Could not compile `utils`.
Sep 04 04:53:33.338 INFO kablam! 
Sep 04 04:53:33.338 INFO kablam! To learn more, run the command again with --verbose.
Sep 04 04:53:33.339 INFO kablam! su: No module specific data is present
Sep 04 04:53:33.726 INFO running `"docker" "rm" "-f" "24e837428158e16dbfbdb31ada3af627d41d834336ef7b8c86fa5ece0226513e"`
Sep 04 04:53:33.849 INFO blam! 24e837428158e16dbfbdb31ada3af627d41d834336ef7b8c86fa5ece0226513e