Sep 02 01:47:04.530 INFO checking buildable-0.0.5 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 02 01:47:04.530 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 02 01:47:04.530 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-3/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/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 +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 02 01:47:04.755 INFO blam! 5361a9d99ef3fdad9fd447931a88fa85b44abbdc59a2e5246334b736f9e74508
Sep 02 01:47:04.756 INFO running `"docker" "start" "-a" "5361a9d99ef3fdad9fd447931a88fa85b44abbdc59a2e5246334b736f9e74508"`
Sep 02 01:47:05.429 INFO kablam!     Checking buildable v0.0.5 (file:///source)
Sep 02 01:47:05.485 INFO kablam! warning: unknown lint: `unstable`
Sep 02 01:47:05.485 INFO kablam!   --> src/lib.rs:12:10
Sep 02 01:47:05.485 INFO kablam!    |
Sep 02 01:47:05.485 INFO kablam! 12 | #![allow(unstable)]
Sep 02 01:47:05.485 INFO kablam!    |          ^^^^^^^^
Sep 02 01:47:05.485 INFO kablam!    |
Sep 02 01:47:05.485 INFO kablam!    = note: #[warn(unknown_lints)] on by default
Sep 02 01:47:05.485 INFO kablam! 
Sep 02 01:47:05.485 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 01:47:05.485 INFO kablam!   --> src/lib.rs:11:4
Sep 02 01:47:05.485 INFO kablam!    |
Sep 02 01:47:05.485 INFO kablam! 11 | #![experimental]
Sep 02 01:47:05.485 INFO kablam!    |    ^^^^^^^^^^^^
Sep 02 01:47:05.485 INFO kablam!    |
Sep 02 01:47:05.485 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:47:05.485 INFO kablam! 
Sep 02 01:47:05.487 INFO kablam! warning: unknown lint: `unstable`
Sep 02 01:47:05.487 INFO kablam!   --> src/lib.rs:12:10
Sep 02 01:47:05.487 INFO kablam!    |
Sep 02 01:47:05.487 INFO kablam! 12 | #![allow(unstable)]
Sep 02 01:47:05.487 INFO kablam!    |          ^^^^^^^^
Sep 02 01:47:05.487 INFO kablam!    |
Sep 02 01:47:05.487 INFO kablam!    = note: #[warn(unknown_lints)] on by default
Sep 02 01:47:05.487 INFO kablam! 
Sep 02 01:47:05.488 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 01:47:05.488 INFO kablam!   --> src/lib.rs:11:4
Sep 02 01:47:05.488 INFO kablam!    |
Sep 02 01:47:05.488 INFO kablam! 11 | #![experimental]
Sep 02 01:47:05.488 INFO kablam!    |    ^^^^^^^^^^^^
Sep 02 01:47:05.488 INFO kablam!    |
Sep 02 01:47:05.488 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:47:05.488 INFO kablam! 
Sep 02 01:47:05.887 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 01:47:05.887 INFO kablam!   --> src/lib.rs:20:3
Sep 02 01:47:05.887 INFO kablam!    |
Sep 02 01:47:05.887 INFO kablam! 20 | #[experimental]
Sep 02 01:47:05.887 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:47:05.887 INFO kablam!    |
Sep 02 01:47:05.887 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:47:05.887 INFO kablam! 
Sep 02 01:47:05.889 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 01:47:05.889 INFO kablam!    --> src/lib.rs:196:3
Sep 02 01:47:05.889 INFO kablam!     |
Sep 02 01:47:05.889 INFO kablam! 196 | #[experimental]
Sep 02 01:47:05.889 INFO kablam!     |   ^^^^^^^^^^^^
Sep 02 01:47:05.889 INFO kablam!     |
Sep 02 01:47:05.889 INFO kablam!     = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:47:05.889 INFO kablam! 
Sep 02 01:47:05.892 INFO kablam! error: aborting due to 3 previous errors
Sep 02 01:47:05.892 INFO kablam! 
Sep 02 01:47:05.892 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 02 01:47:05.897 INFO kablam! error: Could not compile `buildable`.
Sep 02 01:47:05.897 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 02 01:47:05.919 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 01:47:05.919 INFO kablam!   --> src/lib.rs:20:3
Sep 02 01:47:05.919 INFO kablam!    |
Sep 02 01:47:05.919 INFO kablam! 20 | #[experimental]
Sep 02 01:47:05.919 INFO kablam!    |   ^^^^^^^^^^^^
Sep 02 01:47:05.920 INFO kablam!    |
Sep 02 01:47:05.920 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:47:05.920 INFO kablam! 
Sep 02 01:47:05.921 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 01:47:05.921 INFO kablam!    --> src/lib.rs:196:3
Sep 02 01:47:05.921 INFO kablam!     |
Sep 02 01:47:05.921 INFO kablam! 196 | #[experimental]
Sep 02 01:47:05.921 INFO kablam!     |   ^^^^^^^^^^^^
Sep 02 01:47:05.921 INFO kablam!     |
Sep 02 01:47:05.921 INFO kablam!     = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 01:47:05.921 INFO kablam! 
Sep 02 01:47:05.948 INFO kablam! error: aborting due to 3 previous errors
Sep 02 01:47:05.948 INFO kablam! 
Sep 02 01:47:05.948 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 02 01:47:05.952 INFO kablam! error: Could not compile `buildable`.
Sep 02 01:47:05.952 INFO kablam! 
Sep 02 01:47:05.952 INFO kablam! To learn more, run the command again with --verbose.
Sep 02 01:47:05.953 INFO kablam! su: No module specific data is present
Sep 02 01:47:06.749 INFO running `"docker" "rm" "-f" "5361a9d99ef3fdad9fd447931a88fa85b44abbdc59a2e5246334b736f9e74508"`
Sep 02 01:47:06.833 INFO blam! 5361a9d99ef3fdad9fd447931a88fa85b44abbdc59a2e5246334b736f9e74508