Sep 01 20:18:30.307 INFO checking futures-black-hole-0.2.2 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 01 20:18:30.307 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 01 20:18:30.307 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-1/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/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 +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 20:18:30.465 INFO blam! 10ee16490a45eb12012d9001fb011674d8220fd2d9222129e8b729bb5664896b
Sep 01 20:18:30.467 INFO running `"docker" "start" "-a" "10ee16490a45eb12012d9001fb011674d8220fd2d9222129e8b729bb5664896b"`
Sep 01 20:18:31.072 INFO kablam!     Checking futures-black-hole v0.2.2 (file:///source)
Sep 01 20:18:31.957 INFO kablam! warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
Sep 01 20:18:31.957 INFO kablam!  --> src/lib.rs:1:12
Sep 01 20:18:31.957 INFO kablam!   |
Sep 01 20:18:31.957 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 01 20:18:31.957 INFO kablam!   |            ^^^^^^^^^^
Sep 01 20:18:31.957 INFO kablam!   |
Sep 01 20:18:31.957 INFO kablam!   = note: #[warn(stable_features)] on by default
Sep 01 20:18:31.957 INFO kablam! 
Sep 01 20:18:31.957 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 20:18:31.957 INFO kablam!  --> src/lib.rs:1:24
Sep 01 20:18:31.957 INFO kablam!   |
Sep 01 20:18:31.957 INFO kablam! 1 | #![feature(proc_macro, conservative_impl_trait, generators)]
Sep 01 20:18:31.957 INFO kablam!   |                        ^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 20:18:31.957 INFO kablam! 
Sep 01 20:18:32.037 INFO kablam! error[E0659]: `await` is ambiguous
Sep 01 20:18:32.037 INFO kablam!    --> src/black_hole.rs:140:9
Sep 01 20:18:32.037 INFO kablam!     |
Sep 01 20:18:32.037 INFO kablam! 140 |         await!(b)?;
Sep 01 20:18:32.037 INFO kablam!     |         ^^^^^
Sep 01 20:18:32.037 INFO kablam!     |
Sep 01 20:18:32.037 INFO kablam! note: `await` could refer to the name imported here
Sep 01 20:18:32.037 INFO kablam!    --> src/black_hole.rs:100:9
Sep 01 20:18:32.038 INFO kablam!     |
Sep 01 20:18:32.038 INFO kablam! 100 |     use futures::prelude::*;
Sep 01 20:18:32.038 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^
Sep 01 20:18:32.038 INFO kablam!     = note: `await` is also a builtin macro
Sep 01 20:18:32.038 INFO kablam!     = note: consider adding an explicit import of `await` to disambiguate
Sep 01 20:18:32.038 INFO kablam! 
Sep 01 20:18:32.205 INFO kablam! error: aborting due to previous error
Sep 01 20:18:32.205 INFO kablam! 
Sep 01 20:18:32.205 INFO kablam! For more information about this error, try `rustc --explain E0659`.
Sep 01 20:18:32.212 INFO kablam! error: Could not compile `futures-black-hole`.
Sep 01 20:18:32.212 INFO kablam! 
Sep 01 20:18:32.212 INFO kablam! To learn more, run the command again with --verbose.
Sep 01 20:18:32.214 INFO kablam! su: No module specific data is present
Sep 01 20:18:32.667 INFO running `"docker" "rm" "-f" "10ee16490a45eb12012d9001fb011674d8220fd2d9222129e8b729bb5664896b"`
Sep 01 20:18:32.762 INFO blam! 10ee16490a45eb12012d9001fb011674d8220fd2d9222129e8b729bb5664896b