Sep 21 10:11:21.784 INFO checking futures-black-hole-0.2.2 against try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6 for pr-54394
Sep 21 10:11:21.784 INFO running: cargo +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets
Sep 21 10:11:21.784 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54394/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-4/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/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=1000" "-e" "CMD=cargo +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 10:11:21.981 INFO blam! 42921bac8388d6d8234a2e075cfaa3bb834c3043851f656d8d05c2f5ea9f8fdd
Sep 21 10:11:21.984 INFO running `"docker" "start" "-a" "42921bac8388d6d8234a2e075cfaa3bb834c3043851f656d8d05c2f5ea9f8fdd"`
Sep 21 10:11:22.790 INFO kablam! usermod: no changes
Sep 21 10:11:22.872 INFO kablam!     Checking futures-black-hole v0.2.2 (/source)
Sep 21 10:11:23.249 INFO kablam! warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Sep 21 10:11:23.249 INFO kablam!  --> src/lib.rs:1:12
Sep 21 10:11:23.249 INFO kablam!   |
Sep 21 10:11:23.249 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 21 10:11:23.249 INFO kablam!   |            ^^^^^^^^^^
Sep 21 10:11:23.249 INFO kablam!   |
Sep 21 10:11:23.249 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 21 10:11:23.249 INFO kablam! 
Sep 21 10:11:23.249 INFO kablam! warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Sep 21 10:11:23.249 INFO kablam!  --> src/lib.rs:1:24
Sep 21 10:11:23.249 INFO kablam!   |
Sep 21 10:11:23.249 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 21 10:11:23.249 INFO kablam!   |                        ^^^^^^^^^^^^^^^^^^^^^^^
Sep 21 10:11:23.249 INFO kablam! 
Sep 21 10:11:23.342 INFO kablam! error[E0659]: `await` is ambiguous
Sep 21 10:11:23.342 INFO kablam!    --> src/black_hole.rs:140:9
Sep 21 10:11:23.342 INFO kablam!     |
Sep 21 10:11:23.342 INFO kablam! 140 |         await!(b)?;
Sep 21 10:11:23.342 INFO kablam!     |         ^^^^^ ambiguous name
Sep 21 10:11:23.342 INFO kablam!     |
Sep 21 10:11:23.342 INFO kablam! note: `await` could refer to the name imported here
Sep 21 10:11:23.342 INFO kablam!    --> src/black_hole.rs:100:9
Sep 21 10:11:23.342 INFO kablam!     |
Sep 21 10:11:23.342 INFO kablam! 100 |     use futures::prelude::*;
Sep 21 10:11:23.342 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^
Sep 21 10:11:23.342 INFO kablam!     = note: `await` is also a builtin macro
Sep 21 10:11:23.342 INFO kablam!     = note: consider adding an explicit import of `await` to disambiguate
Sep 21 10:11:23.342 INFO kablam! 
Sep 21 10:11:23.413 INFO kablam! error: aborting due to previous error
Sep 21 10:11:23.413 INFO kablam! 
Sep 21 10:11:23.413 INFO kablam! For more information about this error, try `rustc --explain E0659`.
Sep 21 10:11:23.420 INFO kablam! error: Could not compile `futures-black-hole`.
Sep 21 10:11:23.420 INFO kablam! 
Sep 21 10:11:23.420 INFO kablam! To learn more, run the command again with --verbose.
Sep 21 10:11:23.421 INFO kablam! su: No module specific data is present
Sep 21 10:11:23.782 INFO running `"docker" "rm" "-f" "42921bac8388d6d8234a2e075cfaa3bb834c3043851f656d8d05c2f5ea9f8fdd"`
Sep 21 10:11:23.859 INFO blam! 42921bac8388d6d8234a2e075cfaa3bb834c3043851f656d8d05c2f5ea9f8fdd