Sep 10 09:15:19.181 INFO checking stash-0.1.3 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 09:15:19.181 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 09:15:19.181 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-6/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 09:15:19.338 INFO blam! f9555aa74e71b63b3e5c178696a1b88ebc07e3e40e6b69151d75d64d77660ec6
Sep 10 09:15:19.340 INFO running `"docker" "start" "-a" "f9555aa74e71b63b3e5c178696a1b88ebc07e3e40e6b69151d75d64d77660ec6"`
Sep 10 09:15:20.284 INFO kablam! usermod: no changes
Sep 10 09:15:20.334 INFO kablam!     Checking stash v0.1.3 (file:///source)
Sep 10 09:15:21.552 INFO kablam! warning: unused import: `std::iter`
Sep 10 09:15:21.552 INFO kablam!  --> benches/unique_stash.rs:7:5
Sep 10 09:15:21.552 INFO kablam!   |
Sep 10 09:15:21.552 INFO kablam! 7 | use std::iter;
Sep 10 09:15:21.552 INFO kablam!   |     ^^^^^^^^^
Sep 10 09:15:21.552 INFO kablam!   |
Sep 10 09:15:21.552 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 10 09:15:21.552 INFO kablam! 
Sep 10 09:15:21.927 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.62s
Sep 10 09:15:21.930 INFO kablam! su: No module specific data is present
Sep 10 09:15:22.390 INFO running `"docker" "rm" "-f" "f9555aa74e71b63b3e5c178696a1b88ebc07e3e40e6b69151d75d64d77660ec6"`
Sep 10 09:15:22.480 INFO blam! f9555aa74e71b63b3e5c178696a1b88ebc07e3e40e6b69151d75d64d77660ec6