Aug 17 22:27:53.653 INFO checking futures-black-hole-0.2.2 against try#a5d98b025f62ace80fe9d2a15781f900fc42515e for pr-53426
Aug 17 22:27:53.653 INFO running: cargo +a5d98b025f62ace80fe9d2a15781f900fc42515e-alt check --frozen --all --all-targets
Aug 17 22:27:53.653 INFO creating container for: cargo +a5d98b025f62ace80fe9d2a15781f900fc42515e-alt check --frozen --all --all-targets
Aug 17 22:27:53.653 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53426/try#a5d98b025f62ace80fe9d2a15781f900fc42515e:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53426/worker-0/try#a5d98b025f62ace80fe9d2a15781f900fc42515e:/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 +a5d98b025f62ace80fe9d2a15781f900fc42515e-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 17 22:27:53.903 INFO blam! 551f5b2fa30cf1b006a2f63eb2dee3b06974f3d4f0683d65320f44a60e68c32f
Aug 17 22:27:53.905 INFO running `"docker" "start" "-a" "551f5b2fa30cf1b006a2f63eb2dee3b06974f3d4f0683d65320f44a60e68c32f"`
Aug 17 22:27:55.050 INFO kablam!    Compiling syn v0.14.8
Aug 17 22:28:37.449 INFO kablam!    Compiling futures-await-async-macro v0.1.4
Aug 17 22:28:54.307 INFO kablam!     Checking futures-await v0.1.1
Aug 17 22:28:55.000 INFO kablam!     Checking futures-black-hole v0.2.2 (file:///source)
Aug 17 22:28:56.280 INFO kablam! error[E0658]: attribute procedural macros are experimental (see issue #35896)
Aug 17 22:28:56.280 INFO kablam!    --> src/black_hole.rs:137:5
Aug 17 22:28:56.280 INFO kablam!     |
Aug 17 22:28:56.280 INFO kablam! 100 |     use futures::prelude::*;
Aug 17 22:28:56.280 INFO kablam!     |         ------------------- procedural macro imported here
Aug 17 22:28:56.280 INFO kablam! ...
Aug 17 22:28:56.280 INFO kablam! 137 |     #[async]
Aug 17 22:28:56.280 INFO kablam!     |     ^^^^^^^^
Aug 17 22:28:56.280 INFO kablam!     |
Aug 17 22:28:56.280 INFO kablam!     = help: add #![feature(use_extern_macros)] to the crate attributes to enable
Aug 17 22:28:56.280 INFO kablam! 
Aug 17 22:28:56.281 INFO kablam! error[E0658]: attribute procedural macros are experimental (see issue #35896)
Aug 17 22:28:56.281 INFO kablam!    --> src/black_hole.rs:145:5
Aug 17 22:28:56.281 INFO kablam!     |
Aug 17 22:28:56.281 INFO kablam! 100 |     use futures::prelude::*;
Aug 17 22:28:56.281 INFO kablam!     |         ------------------- procedural macro imported here
Aug 17 22:28:56.281 INFO kablam! ...
Aug 17 22:28:56.281 INFO kablam! 145 |     #[async]
Aug 17 22:28:56.281 INFO kablam!     |     ^^^^^^^^
Aug 17 22:28:56.281 INFO kablam!     |
Aug 17 22:28:56.281 INFO kablam!     = help: add #![feature(use_extern_macros)] to the crate attributes to enable
Aug 17 22:28:56.282 INFO kablam! 
Aug 17 22:28:56.283 INFO kablam! error[E0659]: `await` is ambiguous
Aug 17 22:28:56.283 INFO kablam!    --> src/black_hole.rs:140:9
Aug 17 22:28:56.283 INFO kablam!     |
Aug 17 22:28:56.283 INFO kablam! 140 |         await!(b)?;
Aug 17 22:28:56.283 INFO kablam!     |         ^^^^^
Aug 17 22:28:56.284 INFO kablam!     |
Aug 17 22:28:56.284 INFO kablam! note: `await` could refer to the name imported here
Aug 17 22:28:56.284 INFO kablam!    --> src/black_hole.rs:100:9
Aug 17 22:28:56.284 INFO kablam!     |
Aug 17 22:28:56.284 INFO kablam! 100 |     use futures::prelude::*;
Aug 17 22:28:56.284 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^
Aug 17 22:28:56.284 INFO kablam!     = note: `await` is also a builtin macro
Aug 17 22:28:56.284 INFO kablam!     = note: consider adding an explicit import of `await` to disambiguate
Aug 17 22:28:56.285 INFO kablam! 
Aug 17 22:28:56.446 INFO kablam! warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Aug 17 22:28:56.446 INFO kablam!  --> src/lib.rs:1:12
Aug 17 22:28:56.446 INFO kablam!   |
Aug 17 22:28:56.446 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Aug 17 22:28:56.446 INFO kablam!   |            ^^^^^^^^^^
Aug 17 22:28:56.447 INFO kablam!   |
Aug 17 22:28:56.447 INFO kablam!   = note: #[warn(stable_features)] on by default
Aug 17 22:28:56.447 INFO kablam! 
Aug 17 22:28:56.447 INFO kablam! warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Aug 17 22:28:56.447 INFO kablam!  --> src/lib.rs:1:24
Aug 17 22:28:56.447 INFO kablam!   |
Aug 17 22:28:56.447 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Aug 17 22:28:56.447 INFO kablam!   |                        ^^^^^^^^^^^^^^^^^^^^^^^
Aug 17 22:28:56.447 INFO kablam! 
Aug 17 22:28:56.632 INFO kablam! error[E0627]: yield statement outside of generator literal
Aug 17 22:28:56.632 INFO kablam!    --> src/black_hole.rs:140:9
Aug 17 22:28:56.632 INFO kablam!     |
Aug 17 22:28:56.632 INFO kablam! 140 |         await!(b)?;
Aug 17 22:28:56.632 INFO kablam!     |         ^^^^^^^^^
Aug 17 22:28:56.638 INFO kablam!     |
Aug 17 22:28:56.638 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 17 22:28:56.639 INFO kablam! 
Aug 17 22:28:56.664 INFO kablam! error[E0277]: the trait bound `std::result::Result<(), black_hole::BlackHoleError>: futures::Future` is not satisfied
Aug 17 22:28:56.664 INFO kablam!    --> src/black_hole.rs:161:20
Aug 17 22:28:56.664 INFO kablam!     |
Aug 17 22:28:56.664 INFO kablam! 161 |         let f1 = p.spawn(send(s.clone(), b.clone()));
Aug 17 22:28:56.664 INFO kablam!     |                    ^^^^^ the trait `futures::Future` is not implemented for `std::result::Result<(), black_hole::BlackHoleError>`
Aug 17 22:28:56.664 INFO kablam! 
Aug 17 22:28:56.670 INFO kablam! error[E0277]: the trait bound `std::result::Result<(), black_hole::BlackHoleError>: futures::Future` is not satisfied
Aug 17 22:28:56.670 INFO kablam!    --> src/black_hole.rs:167:20
Aug 17 22:28:56.670 INFO kablam!     |
Aug 17 22:28:56.670 INFO kablam! 167 |         let f2 = p.spawn(release(s.clone(), b.clone()));
Aug 17 22:28:56.670 INFO kablam!     |                    ^^^^^ the trait `futures::Future` is not implemented for `std::result::Result<(), black_hole::BlackHoleError>`
Aug 17 22:28:56.670 INFO kablam! 
Aug 17 22:28:56.684 INFO kablam! error: aborting due to 6 previous errors
Aug 17 22:28:56.685 INFO kablam! 
Aug 17 22:28:56.686 INFO kablam! Some errors occurred: E0277, E0627, E0658, E0659.
Aug 17 22:28:56.686 INFO kablam! For more information about an error, try `rustc --explain E0277`.
Aug 17 22:28:56.697 INFO kablam! error: Could not compile `futures-black-hole`.
Aug 17 22:28:56.697 INFO kablam! 
Aug 17 22:28:56.697 INFO kablam! To learn more, run the command again with --verbose.
Aug 17 22:28:56.699 INFO kablam! su: No module specific data is present
Aug 17 22:28:57.163 INFO running `"docker" "rm" "-f" "551f5b2fa30cf1b006a2f63eb2dee3b06974f3d4f0683d65320f44a60e68c32f"`
Aug 17 22:28:57.332 INFO blam! 551f5b2fa30cf1b006a2f63eb2dee3b06974f3d4f0683d65320f44a60e68c32f