Sep 14 16:19:50.822 INFO checking futures-black-hole-0.2.2 against try#87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0 for pr-53578-1
Sep 14 16:19:50.822 INFO running: cargo +87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0-alt check --frozen --all --all-targets
Sep 14 16:19:50.822 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53578-1/try#87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578-1/worker-1/try#87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0:/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 +87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 14 16:19:51.100 INFO blam! d3e052eb93cfc5a684be7c6adf423b396496e7646d8fdd77218b69316ab57202
Sep 14 16:19:51.109 INFO running `"docker" "start" "-a" "d3e052eb93cfc5a684be7c6adf423b396496e7646d8fdd77218b69316ab57202"`
Sep 14 16:19:52.191 INFO kablam! usermod: no changes
Sep 14 16:19:52.235 INFO kablam!     Checking futures-await-await-macro v0.1.1
Sep 14 16:19:52.235 INFO kablam!    Compiling syn v0.14.9
Sep 14 16:20:05.194 INFO kablam!    Compiling futures-await-async-macro v0.1.4
Sep 14 16:20:11.935 INFO kablam!     Checking futures-await v0.1.1
Sep 14 16:20:12.203 INFO kablam!     Checking futures-black-hole v0.2.2 (file:///source)
Sep 14 16:20:12.667 INFO kablam! warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Sep 14 16:20:12.667 INFO kablam!  --> src/lib.rs:1:12
Sep 14 16:20:12.667 INFO kablam!   |
Sep 14 16:20:12.667 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 14 16:20:12.667 INFO kablam!   |            ^^^^^^^^^^
Sep 14 16:20:12.667 INFO kablam!   |
Sep 14 16:20:12.667 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 14 16:20:12.667 INFO kablam! 
Sep 14 16:20:12.667 INFO kablam! warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Sep 14 16:20:12.667 INFO kablam!  --> src/lib.rs:1:24
Sep 14 16:20:12.667 INFO kablam!   |
Sep 14 16:20:12.667 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 14 16:20:12.667 INFO kablam!   |                        ^^^^^^^^^^^^^^^^^^^^^^^
Sep 14 16:20:12.667 INFO kablam! 
Sep 14 16:20:12.771 INFO kablam! error[E0659]: `await` is ambiguous
Sep 14 16:20:12.771 INFO kablam!    --> src/black_hole.rs:140:9
Sep 14 16:20:12.771 INFO kablam!     |
Sep 14 16:20:12.771 INFO kablam! 140 |         await!(b)?;
Sep 14 16:20:12.771 INFO kablam!     |         ^^^^^ ambiguous name
Sep 14 16:20:12.771 INFO kablam!     |
Sep 14 16:20:12.771 INFO kablam! note: `await` could refer to the name imported here
Sep 14 16:20:12.771 INFO kablam!    --> src/black_hole.rs:100:9
Sep 14 16:20:12.771 INFO kablam!     |
Sep 14 16:20:12.771 INFO kablam! 100 |     use futures::prelude::*;
Sep 14 16:20:12.771 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^
Sep 14 16:20:12.771 INFO kablam!     = note: `await` is also a builtin macro
Sep 14 16:20:12.771 INFO kablam!     = note: consider adding an explicit import of `await` to disambiguate
Sep 14 16:20:12.771 INFO kablam! 
Sep 14 16:20:12.869 INFO kablam! error: aborting due to previous error
Sep 14 16:20:12.869 INFO kablam! 
Sep 14 16:20:12.869 INFO kablam! For more information about this error, try `rustc --explain E0659`.
Sep 14 16:20:12.877 INFO kablam! error: Could not compile `futures-black-hole`.
Sep 14 16:20:12.877 INFO kablam! 
Sep 14 16:20:12.878 INFO kablam! To learn more, run the command again with --verbose.
Sep 14 16:20:12.879 INFO kablam! su: No module specific data is present
Sep 14 16:20:13.456 INFO running `"docker" "rm" "-f" "d3e052eb93cfc5a684be7c6adf423b396496e7646d8fdd77218b69316ab57202"`
Sep 14 16:20:13.659 INFO blam! d3e052eb93cfc5a684be7c6adf423b396496e7646d8fdd77218b69316ab57202