Sep 10 18:49:56.139 INFO checking futures-black-hole-0.2.2 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 18:49:56.139 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 18:49:56.139 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-2/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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 +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 18:49:56.306 INFO blam! 2aa144f31e8c10b45238c85cb71d5c706234a999f049d37e08b1d92a4e529d4a
Sep 10 18:49:56.309 INFO running `"docker" "start" "-a" "2aa144f31e8c10b45238c85cb71d5c706234a999f049d37e08b1d92a4e529d4a"`
Sep 10 18:49:56.918 INFO kablam! usermod: no changes
Sep 10 18:49:56.973 INFO kablam!     Checking futures-black-hole v0.2.2 (file:///source)
Sep 10 18:49:57.387 INFO kablam! warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Sep 10 18:49:57.387 INFO kablam!  --> src/lib.rs:1:12
Sep 10 18:49:57.387 INFO kablam!   |
Sep 10 18:49:57.387 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 10 18:49:57.388 INFO kablam!   |            ^^^^^^^^^^
Sep 10 18:49:57.388 INFO kablam!   |
Sep 10 18:49:57.388 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 10 18:49:57.388 INFO kablam! 
Sep 10 18:49:57.388 INFO kablam! warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Sep 10 18:49:57.388 INFO kablam!  --> src/lib.rs:1:24
Sep 10 18:49:57.388 INFO kablam!   |
Sep 10 18:49:57.388 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 10 18:49:57.388 INFO kablam!   |                        ^^^^^^^^^^^^^^^^^^^^^^^
Sep 10 18:49:57.388 INFO kablam! 
Sep 10 18:49:57.438 INFO kablam! error[E0659]: `await` is ambiguous
Sep 10 18:49:57.438 INFO kablam!    --> src/black_hole.rs:140:9
Sep 10 18:49:57.438 INFO kablam!     |
Sep 10 18:49:57.438 INFO kablam! 140 |         await!(b)?;
Sep 10 18:49:57.438 INFO kablam!     |         ^^^^^
Sep 10 18:49:57.438 INFO kablam!     |
Sep 10 18:49:57.438 INFO kablam! note: `await` could refer to the name imported here
Sep 10 18:49:57.438 INFO kablam!    --> src/black_hole.rs:100:9
Sep 10 18:49:57.438 INFO kablam!     |
Sep 10 18:49:57.438 INFO kablam! 100 |     use futures::prelude::*;
Sep 10 18:49:57.438 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^
Sep 10 18:49:57.438 INFO kablam!     = note: `await` is also a builtin macro
Sep 10 18:49:57.438 INFO kablam!     = note: consider adding an explicit import of `await` to disambiguate
Sep 10 18:49:57.438 INFO kablam! 
Sep 10 18:49:57.538 INFO kablam! error: aborting due to previous error
Sep 10 18:49:57.538 INFO kablam! 
Sep 10 18:49:57.538 INFO kablam! For more information about this error, try `rustc --explain E0659`.
Sep 10 18:49:57.548 INFO kablam! error: Could not compile `futures-black-hole`.
Sep 10 18:49:57.548 INFO kablam! 
Sep 10 18:49:57.548 INFO kablam! To learn more, run the command again with --verbose.
Sep 10 18:49:57.549 INFO kablam! su: No module specific data is present
Sep 10 18:49:58.269 INFO running `"docker" "rm" "-f" "2aa144f31e8c10b45238c85cb71d5c706234a999f049d37e08b1d92a4e529d4a"`
Sep 10 18:49:58.390 INFO blam! 2aa144f31e8c10b45238c85cb71d5c706234a999f049d37e08b1d92a4e529d4a