Sep 06 00:50:53.306 INFO checking rust-sort-0.1.4 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 00:50:53.306 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 00:50:53.306 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-1/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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=1000" "-e" "CMD=cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 00:50:53.475 INFO blam! 86beea9e3581c367ad305d31eb1971e0cc4b3488b68b5fb828a69a94bcc94b4e
Sep 06 00:50:53.477 INFO running `"docker" "start" "-a" "86beea9e3581c367ad305d31eb1971e0cc4b3488b68b5fb828a69a94bcc94b4e"`
Sep 06 00:50:54.426 INFO kablam! usermod: no changes
Sep 06 00:50:54.482 INFO kablam!     Checking commandext v0.1.0
Sep 06 00:50:54.482 INFO kablam!     Checking rust-sort v0.1.4 (file:///source)
Sep 06 00:50:54.886 INFO kablam!     Checking utils v0.0.1
Sep 06 00:50:55.070 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 06 00:50:55.070 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:83:3
Sep 06 00:50:55.070 INFO kablam!    |
Sep 06 00:50:55.070 INFO kablam! 83 | #[experimental]
Sep 06 00:50:55.070 INFO kablam!    |   ^^^^^^^^^^^^
Sep 06 00:50:55.070 INFO kablam!    |
Sep 06 00:50:55.070 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 00:50:55.070 INFO kablam! 
Sep 06 00:50:55.070 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 06 00:50:55.070 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:77:3
Sep 06 00:50:55.070 INFO kablam!    |
Sep 06 00:50:55.070 INFO kablam! 77 | #[experimental]
Sep 06 00:50:55.070 INFO kablam!    |   ^^^^^^^^^^^^
Sep 06 00:50:55.070 INFO kablam!    |
Sep 06 00:50:55.070 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 00:50:55.070 INFO kablam! 
Sep 06 00:50:55.070 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 06 00:50:55.070 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:37:3
Sep 06 00:50:55.070 INFO kablam!    |
Sep 06 00:50:55.070 INFO kablam! 37 | #[experimental]
Sep 06 00:50:55.070 INFO kablam!    |   ^^^^^^^^^^^^
Sep 06 00:50:55.070 INFO kablam!    |
Sep 06 00:50:55.070 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 00:50:55.070 INFO kablam! 
Sep 06 00:50:55.070 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 06 00:50:55.071 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:29:3
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam! 29 | #[experimental]
Sep 06 00:50:55.071 INFO kablam!    |   ^^^^^^^^^^^^
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 00:50:55.071 INFO kablam! 
Sep 06 00:50:55.071 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 06 00:50:55.071 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:13:3
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam! 13 | #[experimental]
Sep 06 00:50:55.071 INFO kablam!    |   ^^^^^^^^^^^^
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 00:50:55.071 INFO kablam! 
Sep 06 00:50:55.071 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 06 00:50:55.071 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:63:3
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam! 63 | #[experimental]
Sep 06 00:50:55.071 INFO kablam!    |   ^^^^^^^^^^^^
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 00:50:55.071 INFO kablam! 
Sep 06 00:50:55.071 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 06 00:50:55.071 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:45:3
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam! 45 | #[experimental]
Sep 06 00:50:55.071 INFO kablam!    |   ^^^^^^^^^^^^
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 00:50:55.071 INFO kablam! 
Sep 06 00:50:55.071 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 06 00:50:55.071 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:37:3
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam! 37 | #[experimental]
Sep 06 00:50:55.071 INFO kablam!    |   ^^^^^^^^^^^^
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 00:50:55.071 INFO kablam! 
Sep 06 00:50:55.071 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 06 00:50:55.071 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:29:3
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam! 29 | #[experimental]
Sep 06 00:50:55.071 INFO kablam!    |   ^^^^^^^^^^^^
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 00:50:55.071 INFO kablam! 
Sep 06 00:50:55.071 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 06 00:50:55.071 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:21:3
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam! 21 | #[experimental]
Sep 06 00:50:55.071 INFO kablam!    |   ^^^^^^^^^^^^
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 00:50:55.071 INFO kablam! 
Sep 06 00:50:55.071 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 06 00:50:55.071 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:14:3
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam! 14 | #[experimental]
Sep 06 00:50:55.071 INFO kablam!    |   ^^^^^^^^^^^^
Sep 06 00:50:55.071 INFO kablam!    |
Sep 06 00:50:55.071 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 06 00:50:55.071 INFO kablam! 
Sep 06 00:50:55.071 INFO kablam! error: aborting due to 11 previous errors
Sep 06 00:50:55.071 INFO kablam! 
Sep 06 00:50:55.071 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 06 00:50:55.073 INFO kablam! error: Could not compile `utils`.
Sep 06 00:50:55.073 INFO kablam! 
Sep 06 00:50:55.073 INFO kablam! To learn more, run the command again with --verbose.
Sep 06 00:50:55.073 INFO kablam! su: No module specific data is present
Sep 06 00:50:56.122 INFO running `"docker" "rm" "-f" "86beea9e3581c367ad305d31eb1971e0cc4b3488b68b5fb828a69a94bcc94b4e"`
Sep 06 00:50:56.192 INFO blam! 86beea9e3581c367ad305d31eb1971e0cc4b3488b68b5fb828a69a94bcc94b4e