Sep 10 20:34:46.407 INFO checking currency-0.4.0 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 20:34:46.408 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 20:34:46.408 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-1/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 20:34:46.888 INFO blam! 52b2c130d56e69d7a8bf175356ff78edef75b121a9f57cfe4586581c704024e2
Sep 10 20:34:46.890 INFO running `"docker" "start" "-a" "52b2c130d56e69d7a8bf175356ff78edef75b121a9f57cfe4586581c704024e2"`
Sep 10 20:34:47.828 INFO kablam! usermod: no changes
Sep 10 20:34:47.877 INFO kablam!     Checking currency v0.4.0 (file:///source)
Sep 10 20:34:48.657 INFO kablam! warning: unused import: `std::str::FromStr`
Sep 10 20:34:48.657 INFO kablam!    --> src/lib.rs:752:13
Sep 10 20:34:48.657 INFO kablam!     |
Sep 10 20:34:48.657 INFO kablam! 752 |         use std::str::FromStr;
Sep 10 20:34:48.657 INFO kablam!     |             ^^^^^^^^^^^^^^^^^
Sep 10 20:34:48.657 INFO kablam!     |
Sep 10 20:34:48.657 INFO kablam!     = note: #[warn(unused_imports)] on by default
Sep 10 20:34:48.657 INFO kablam! 
Sep 10 20:34:48.861 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
Sep 10 20:34:48.864 INFO kablam! su: No module specific data is present
Sep 10 20:34:49.591 INFO running `"docker" "rm" "-f" "52b2c130d56e69d7a8bf175356ff78edef75b121a9f57cfe4586581c704024e2"`
Sep 10 20:34:49.683 INFO blam! 52b2c130d56e69d7a8bf175356ff78edef75b121a9f57cfe4586581c704024e2