Sep 01 20:18:32.035 INFO checking futures-black-hole-0.2.2 against master#1114ab684fbad001c4e580326d8eb4d8c4e917d3 for pr-53831
Sep 01 20:18:32.035 INFO running: cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets
Sep 01 20:18:32.035 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53831/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-0/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/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 +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 20:18:32.178 INFO blam! 6ae288d572ac77072e1e10209c54117de1a98d805127cdd03e7f26f9becd4026
Sep 01 20:18:32.180 INFO running `"docker" "start" "-a" "6ae288d572ac77072e1e10209c54117de1a98d805127cdd03e7f26f9becd4026"`
Sep 01 20:18:32.916 INFO kablam!     Checking futures-black-hole v0.2.2 (file:///source)
Sep 01 20:18:33.867 INFO kablam! warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Sep 01 20:18:33.867 INFO kablam!  --> src/lib.rs:1:12
Sep 01 20:18:33.867 INFO kablam!   |
Sep 01 20:18:33.867 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 01 20:18:33.867 INFO kablam!   |            ^^^^^^^^^^
Sep 01 20:18:33.868 INFO kablam!   |
Sep 01 20:18:33.868 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 01 20:18:33.868 INFO kablam! 
Sep 01 20:18:33.868 INFO kablam! warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Sep 01 20:18:33.868 INFO kablam!  --> src/lib.rs:1:24
Sep 01 20:18:33.868 INFO kablam!   |
Sep 01 20:18:33.868 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 01 20:18:33.868 INFO kablam!   |                        ^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 20:18:33.868 INFO kablam! 
Sep 01 20:18:33.954 INFO kablam! error[E0659]: `await` is ambiguous
Sep 01 20:18:33.954 INFO kablam!    --> src/black_hole.rs:140:9
Sep 01 20:18:33.954 INFO kablam!     |
Sep 01 20:18:33.954 INFO kablam! 140 |         await!(b)?;
Sep 01 20:18:33.954 INFO kablam!     |         ^^^^^
Sep 01 20:18:33.954 INFO kablam!     |
Sep 01 20:18:33.954 INFO kablam! note: `await` could refer to the name imported here
Sep 01 20:18:33.954 INFO kablam!    --> src/black_hole.rs:100:9
Sep 01 20:18:33.954 INFO kablam!     |
Sep 01 20:18:33.954 INFO kablam! 100 |     use futures::prelude::*;
Sep 01 20:18:33.954 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^
Sep 01 20:18:33.954 INFO kablam!     = note: `await` is also a builtin macro
Sep 01 20:18:33.954 INFO kablam!     = note: consider adding an explicit import of `await` to disambiguate
Sep 01 20:18:33.954 INFO kablam! 
Sep 01 20:18:34.079 INFO kablam! error: aborting due to previous error
Sep 01 20:18:34.079 INFO kablam! 
Sep 01 20:18:34.079 INFO kablam! For more information about this error, try `rustc --explain E0659`.
Sep 01 20:18:34.086 INFO kablam! error: Could not compile `futures-black-hole`.
Sep 01 20:18:34.086 INFO kablam! 
Sep 01 20:18:34.086 INFO kablam! To learn more, run the command again with --verbose.
Sep 01 20:18:34.087 INFO kablam! su: No module specific data is present
Sep 01 20:18:34.487 INFO running `"docker" "rm" "-f" "6ae288d572ac77072e1e10209c54117de1a98d805127cdd03e7f26f9becd4026"`
Sep 01 20:18:34.588 INFO blam! 6ae288d572ac77072e1e10209c54117de1a98d805127cdd03e7f26f9becd4026