Sep 10 18:50:46.322 INFO checking futures-0.1.23 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 18:50:46.322 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 18:50:46.322 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-4/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/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 +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 18:50:46.516 INFO blam! 18d914610adf96e3230112a739a3e5325186a81e472efca559ae13f22ed39738
Sep 10 18:50:46.518 INFO running `"docker" "start" "-a" "18d914610adf96e3230112a739a3e5325186a81e472efca559ae13f22ed39738"`
Sep 10 18:50:47.187 INFO kablam! usermod: no changes
Sep 10 18:50:47.233 INFO kablam!     Checking futures v0.1.23 (file:///source)
Sep 10 18:50:58.786 INFO kablam! warning: unnecessary parentheses around function argument
Sep 10 18:50:58.786 INFO kablam!   --> tests/bilock.rs:62:38
Sep 10 18:50:58.786 INFO kablam!    |
Sep 10 18:50:58.786 INFO kablam! 62 |     let b = stream::iter_ok::<_, ()>((0..N)).fold(b, |b, _n| {
Sep 10 18:50:58.786 INFO kablam!    |                                      ^^^^^^ help: remove these parentheses
Sep 10 18:50:58.786 INFO kablam!    |
Sep 10 18:50:58.786 INFO kablam!    = note: #[warn(unused_parens)] on by default
Sep 10 18:50:58.786 INFO kablam! 
Sep 10 18:51:00.408 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 13.19s
Sep 10 18:51:00.426 INFO kablam! su: No module specific data is present
Sep 10 18:51:00.962 INFO running `"docker" "rm" "-f" "18d914610adf96e3230112a739a3e5325186a81e472efca559ae13f22ed39738"`
Sep 10 18:51:01.027 INFO blam! 18d914610adf96e3230112a739a3e5325186a81e472efca559ae13f22ed39738