Aug 11 14:07:00.775 INFO checking futures-black-hole-0.2.2 against master#f6d43ed84207c7e58f363f46e5a438ff40f2b311 for libc-1
Aug 11 14:07:00.775 INFO running: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 14:07:00.775 INFO creating container for: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 14:07:00.776 INFO running `"docker" "create" "-v" "/tmp/crater.Aw2lx3cCgBFO:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-1/master#f6d43ed84207c7e58f363f46e5a438ff40f2b311:/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 +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 11 14:07:00.998 INFO blam! f008992ba04fc784438435345e69a46d1f037a5572be9fe490c1935ade13da21
Aug 11 14:07:01.000 INFO running `"docker" "start" "-a" "f008992ba04fc784438435345e69a46d1f037a5572be9fe490c1935ade13da21"`
Aug 11 14:07:02.102 INFO kablam!     Checking futures-black-hole v0.2.2 (file:///source)
Aug 11 14:07:03.046 INFO kablam! error[E0658]: attribute procedural macros are experimental (see issue #35896)
Aug 11 14:07:03.046 INFO kablam!    --> src/black_hole.rs:137:5
Aug 11 14:07:03.046 INFO kablam!     |
Aug 11 14:07:03.046 INFO kablam! 100 |     use futures::prelude::*;
Aug 11 14:07:03.046 INFO kablam!     |         ------------------- procedural macro imported here
Aug 11 14:07:03.046 INFO kablam! ...
Aug 11 14:07:03.046 INFO kablam! 137 |     #[async]
Aug 11 14:07:03.046 INFO kablam!     |     ^^^^^^^^
Aug 11 14:07:03.046 INFO kablam!     |
Aug 11 14:07:03.046 INFO kablam!     = help: add #![feature(use_extern_macros)] to the crate attributes to enable
Aug 11 14:07:03.046 INFO kablam! 
Aug 11 14:07:03.047 INFO kablam! error[E0658]: attribute procedural macros are experimental (see issue #35896)
Aug 11 14:07:03.047 INFO kablam!    --> src/black_hole.rs:145:5
Aug 11 14:07:03.047 INFO kablam!     |
Aug 11 14:07:03.047 INFO kablam! 100 |     use futures::prelude::*;
Aug 11 14:07:03.047 INFO kablam!     |         ------------------- procedural macro imported here
Aug 11 14:07:03.047 INFO kablam! ...
Aug 11 14:07:03.047 INFO kablam! 145 |     #[async]
Aug 11 14:07:03.047 INFO kablam!     |     ^^^^^^^^
Aug 11 14:07:03.047 INFO kablam!     |
Aug 11 14:07:03.047 INFO kablam!     = help: add #![feature(use_extern_macros)] to the crate attributes to enable
Aug 11 14:07:03.047 INFO kablam! 
Aug 11 14:07:03.048 INFO kablam! error[E0659]: `await` is ambiguous
Aug 11 14:07:03.048 INFO kablam!    --> src/black_hole.rs:140:9
Aug 11 14:07:03.048 INFO kablam!     |
Aug 11 14:07:03.048 INFO kablam! 140 |         await!(b)?;
Aug 11 14:07:03.048 INFO kablam!     |         ^^^^^
Aug 11 14:07:03.048 INFO kablam!     |
Aug 11 14:07:03.048 INFO kablam! note: `await` could refer to the name imported here
Aug 11 14:07:03.048 INFO kablam!    --> src/black_hole.rs:100:9
Aug 11 14:07:03.048 INFO kablam!     |
Aug 11 14:07:03.048 INFO kablam! 100 |     use futures::prelude::*;
Aug 11 14:07:03.048 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^
Aug 11 14:07:03.048 INFO kablam!     = note: `await` is also a builtin macro
Aug 11 14:07:03.048 INFO kablam!     = note: consider adding an explicit import of `await` to disambiguate
Aug 11 14:07:03.048 INFO kablam! 
Aug 11 14:07:03.107 INFO kablam! warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Aug 11 14:07:03.107 INFO kablam!  --> src/lib.rs:1:12
Aug 11 14:07:03.107 INFO kablam!   |
Aug 11 14:07:03.107 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Aug 11 14:07:03.107 INFO kablam!   |            ^^^^^^^^^^
Aug 11 14:07:03.108 INFO kablam!   |
Aug 11 14:07:03.108 INFO kablam!   = note: #[warn(stable_features)] on by default
Aug 11 14:07:03.108 INFO kablam! 
Aug 11 14:07:03.108 INFO kablam! warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Aug 11 14:07:03.108 INFO kablam!  --> src/lib.rs:1:24
Aug 11 14:07:03.108 INFO kablam!   |
Aug 11 14:07:03.108 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Aug 11 14:07:03.108 INFO kablam!   |                        ^^^^^^^^^^^^^^^^^^^^^^^
Aug 11 14:07:03.109 INFO kablam! 
Aug 11 14:07:03.314 INFO kablam! error[E0627]: yield statement outside of generator literal
Aug 11 14:07:03.314 INFO kablam!    --> src/black_hole.rs:140:9
Aug 11 14:07:03.314 INFO kablam!     |
Aug 11 14:07:03.314 INFO kablam! 140 |         await!(b)?;
Aug 11 14:07:03.314 INFO kablam!     |         ^^^^^^^^^
Aug 11 14:07:03.314 INFO kablam!     |
Aug 11 14:07:03.314 INFO kablam!     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Aug 11 14:07:03.314 INFO kablam! 
Aug 11 14:07:03.339 INFO kablam! error[E0277]: the trait bound `std::result::Result<(), black_hole::BlackHoleError>: futures::Future` is not satisfied
Aug 11 14:07:03.339 INFO kablam!    --> src/black_hole.rs:161:20
Aug 11 14:07:03.339 INFO kablam!     |
Aug 11 14:07:03.339 INFO kablam! 161 |         let f1 = p.spawn(send(s.clone(), b.clone()));
Aug 11 14:07:03.339 INFO kablam!     |                    ^^^^^ the trait `futures::Future` is not implemented for `std::result::Result<(), black_hole::BlackHoleError>`
Aug 11 14:07:03.339 INFO kablam! 
Aug 11 14:07:03.345 INFO kablam! error[E0277]: the trait bound `std::result::Result<(), black_hole::BlackHoleError>: futures::Future` is not satisfied
Aug 11 14:07:03.345 INFO kablam!    --> src/black_hole.rs:167:20
Aug 11 14:07:03.345 INFO kablam!     |
Aug 11 14:07:03.345 INFO kablam! 167 |         let f2 = p.spawn(release(s.clone(), b.clone()));
Aug 11 14:07:03.345 INFO kablam!     |                    ^^^^^ the trait `futures::Future` is not implemented for `std::result::Result<(), black_hole::BlackHoleError>`
Aug 11 14:07:03.345 INFO kablam! 
Aug 11 14:07:03.358 INFO kablam! error: aborting due to 6 previous errors
Aug 11 14:07:03.358 INFO kablam! 
Aug 11 14:07:03.359 INFO kablam! Some errors occurred: E0277, E0627, E0658, E0659.
Aug 11 14:07:03.359 INFO kablam! For more information about an error, try `rustc --explain E0277`.
Aug 11 14:07:03.369 INFO kablam! error: Could not compile `futures-black-hole`.
Aug 11 14:07:03.369 INFO kablam! 
Aug 11 14:07:03.369 INFO kablam! To learn more, run the command again with --verbose.
Aug 11 14:07:03.370 INFO kablam! su: No module specific data is present
Aug 11 14:07:04.011 INFO running `"docker" "rm" "-f" "f008992ba04fc784438435345e69a46d1f037a5572be9fe490c1935ade13da21"`
Aug 11 14:07:04.180 INFO blam! f008992ba04fc784438435345e69a46d1f037a5572be9fe490c1935ade13da21