Sep 06 06:49:16.080 INFO checking futures-black-hole-0.2.2 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 06:49:16.080 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 06:49:16.080 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-2/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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 +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 06:49:16.202 INFO blam! 4c5590381887b1056710f2ff32c95c4b7de0dc4098f0ab3d120fbcd39ec3d678
Sep 06 06:49:16.203 INFO running `"docker" "start" "-a" "4c5590381887b1056710f2ff32c95c4b7de0dc4098f0ab3d120fbcd39ec3d678"`
Sep 06 06:49:17.104 INFO kablam! usermod: no changes
Sep 06 06:49:17.203 INFO kablam!     Checking futures-black-hole v0.2.2 (file:///source)
Sep 06 06:49:17.548 INFO kablam! warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Sep 06 06:49:17.548 INFO kablam!  --> src/lib.rs:1:12
Sep 06 06:49:17.548 INFO kablam!   |
Sep 06 06:49:17.548 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 06 06:49:17.548 INFO kablam!   |            ^^^^^^^^^^
Sep 06 06:49:17.548 INFO kablam!   |
Sep 06 06:49:17.548 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 06 06:49:17.548 INFO kablam! 
Sep 06 06:49:17.548 INFO kablam! warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Sep 06 06:49:17.548 INFO kablam!  --> src/lib.rs:1:24
Sep 06 06:49:17.548 INFO kablam!   |
Sep 06 06:49:17.548 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 06 06:49:17.548 INFO kablam!   |                        ^^^^^^^^^^^^^^^^^^^^^^^
Sep 06 06:49:17.548 INFO kablam! 
Sep 06 06:49:17.721 INFO kablam! error[E0659]: `await` is ambiguous
Sep 06 06:49:17.721 INFO kablam!    --> src/black_hole.rs:140:9
Sep 06 06:49:17.721 INFO kablam!     |
Sep 06 06:49:17.721 INFO kablam! 140 |         await!(b)?;
Sep 06 06:49:17.721 INFO kablam!     |         ^^^^^
Sep 06 06:49:17.721 INFO kablam!     |
Sep 06 06:49:17.721 INFO kablam! note: `await` could refer to the name imported here
Sep 06 06:49:17.721 INFO kablam!    --> src/black_hole.rs:100:9
Sep 06 06:49:17.721 INFO kablam!     |
Sep 06 06:49:17.722 INFO kablam! 100 |     use futures::prelude::*;
Sep 06 06:49:17.722 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^
Sep 06 06:49:17.722 INFO kablam!     = note: `await` is also a builtin macro
Sep 06 06:49:17.722 INFO kablam!     = note: consider adding an explicit import of `await` to disambiguate
Sep 06 06:49:17.722 INFO kablam! 
Sep 06 06:49:17.814 INFO kablam! error: aborting due to previous error
Sep 06 06:49:17.814 INFO kablam! 
Sep 06 06:49:17.814 INFO kablam! For more information about this error, try `rustc --explain E0659`.
Sep 06 06:49:17.823 INFO kablam! error: Could not compile `futures-black-hole`.
Sep 06 06:49:17.823 INFO kablam! 
Sep 06 06:49:17.823 INFO kablam! To learn more, run the command again with --verbose.
Sep 06 06:49:17.823 INFO kablam! su: No module specific data is present
Sep 06 06:49:18.289 INFO running `"docker" "rm" "-f" "4c5590381887b1056710f2ff32c95c4b7de0dc4098f0ab3d120fbcd39ec3d678"`
Sep 06 06:49:18.395 INFO blam! 4c5590381887b1056710f2ff32c95c4b7de0dc4098f0ab3d120fbcd39ec3d678