Sep 02 01:31:33.216 INFO checking rust-sort-0.1.4 against try#952c7dbfa2628309f557b367929ffc17af20b332 for pr-53851
Sep 02 01:31:33.216 INFO running: cargo +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets
Sep 02 01:31:33.216 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53851/try#952c7dbfa2628309f557b367929ffc17af20b332:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53851/worker-0/try#952c7dbfa2628309f557b367929ffc17af20b332:/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 +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 02 01:31:33.393 INFO blam! d72b263fde66f003bbee84b846c459e9a8f9174e4902462a8c6a4c6749efde84
Sep 02 01:31:33.395 INFO running `"docker" "start" "-a" "d72b263fde66f003bbee84b846c459e9a8f9174e4902462a8c6a4c6749efde84"`
Sep 02 01:31:34.115 INFO kablam!     Checking rust-sort v0.1.4 (file:///source)
Sep 02 01:31:34.115 INFO kablam!     Checking utils v0.0.1
Sep 02 01:31:34.469 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 02 01:31:34.469 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:83:3
Sep 02 01:31:34.469 INFO kablam!    |
Sep 02 01:31:34.469 INFO kablam! 83 | #[experimental]
Sep 02 01:31:34.469 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:31:34.469 INFO kablam!    |
Sep 02 01:31:34.470 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:31:34.470 INFO kablam! 
Sep 02 01:31:34.470 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 02 01:31:34.470 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:77:3
Sep 02 01:31:34.470 INFO kablam!    |
Sep 02 01:31:34.470 INFO kablam! 77 | #[experimental]
Sep 02 01:31:34.470 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:31:34.470 INFO kablam!    |
Sep 02 01:31:34.470 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:31:34.470 INFO kablam! 
Sep 02 01:31:34.470 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 02 01:31:34.470 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:37:3
Sep 02 01:31:34.470 INFO kablam!    |
Sep 02 01:31:34.470 INFO kablam! 37 | #[experimental]
Sep 02 01:31:34.470 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:31:34.470 INFO kablam!    |
Sep 02 01:31:34.470 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:31:34.470 INFO kablam! 
Sep 02 01:31:34.471 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 02 01:31:34.471 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:29:3
Sep 02 01:31:34.471 INFO kablam!    |
Sep 02 01:31:34.471 INFO kablam! 29 | #[experimental]
Sep 02 01:31:34.471 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:31:34.471 INFO kablam!    |
Sep 02 01:31:34.471 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:31:34.471 INFO kablam! 
Sep 02 01:31:34.471 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 02 01:31:34.471 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:13:3
Sep 02 01:31:34.471 INFO kablam!    |
Sep 02 01:31:34.471 INFO kablam! 13 | #[experimental]
Sep 02 01:31:34.471 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:31:34.471 INFO kablam!    |
Sep 02 01:31:34.471 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:31:34.471 INFO kablam! 
Sep 02 01:31:34.472 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 02 01:31:34.472 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:63:3
Sep 02 01:31:34.472 INFO kablam!    |
Sep 02 01:31:34.472 INFO kablam! 63 | #[experimental]
Sep 02 01:31:34.472 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:31:34.472 INFO kablam!    |
Sep 02 01:31:34.472 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:31:34.472 INFO kablam! 
Sep 02 01:31:34.472 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 02 01:31:34.472 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:45:3
Sep 02 01:31:34.472 INFO kablam!    |
Sep 02 01:31:34.472 INFO kablam! 45 | #[experimental]
Sep 02 01:31:34.472 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:31:34.473 INFO kablam!    |
Sep 02 01:31:34.473 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:31:34.473 INFO kablam! 
Sep 02 01:31:34.473 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 02 01:31:34.473 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:37:3
Sep 02 01:31:34.473 INFO kablam!    |
Sep 02 01:31:34.473 INFO kablam! 37 | #[experimental]
Sep 02 01:31:34.473 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:31:34.473 INFO kablam!    |
Sep 02 01:31:34.473 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:31:34.473 INFO kablam! 
Sep 02 01:31:34.473 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 02 01:31:34.473 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:29:3
Sep 02 01:31:34.473 INFO kablam!    |
Sep 02 01:31:34.473 INFO kablam! 29 | #[experimental]
Sep 02 01:31:34.473 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:31:34.473 INFO kablam!    |
Sep 02 01:31:34.473 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:31:34.474 INFO kablam! 
Sep 02 01:31:34.474 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 02 01:31:34.474 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:21:3
Sep 02 01:31:34.474 INFO kablam!    |
Sep 02 01:31:34.474 INFO kablam! 21 | #[experimental]
Sep 02 01:31:34.474 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:31:34.474 INFO kablam!    |
Sep 02 01:31:34.474 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:31:34.474 INFO kablam! 
Sep 02 01:31:34.474 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 02 01:31:34.474 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:14:3
Sep 02 01:31:34.474 INFO kablam!    |
Sep 02 01:31:34.474 INFO kablam! 14 | #[experimental]
Sep 02 01:31:34.474 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:31:34.474 INFO kablam!    |
Sep 02 01:31:34.474 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:31:34.474 INFO kablam! 
Sep 02 01:31:34.475 INFO kablam! error: aborting due to 11 previous errors
Sep 02 01:31:34.475 INFO kablam! 
Sep 02 01:31:34.475 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 02 01:31:34.478 INFO kablam! error: Could not compile `utils`.
Sep 02 01:31:34.478 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 02 01:31:34.597 INFO kablam! error: build failed
Sep 02 01:31:34.598 INFO kablam! su: No module specific data is present
Sep 02 01:31:35.043 INFO running `"docker" "rm" "-f" "d72b263fde66f003bbee84b846c459e9a8f9174e4902462a8c6a4c6749efde84"`
Sep 02 01:31:35.177 INFO blam! d72b263fde66f003bbee84b846c459e9a8f9174e4902462a8c6a4c6749efde84