Sep 10 19:34:52.901 INFO checking enumerate-split-0.0.1 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 19:34:52.901 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 19:34:52.901 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 19:34:53.144 INFO blam! 4f5d46d50b75f837217dd4ca48fb3d9c3685429a20a652a3f311139557147bd6
Sep 10 19:34:53.146 INFO running `"docker" "start" "-a" "4f5d46d50b75f837217dd4ca48fb3d9c3685429a20a652a3f311139557147bd6"`
Sep 10 19:34:54.030 INFO kablam! usermod: no changes
Sep 10 19:34:54.096 INFO kablam!     Checking enumerate-split v0.0.1 (file:///source)
Sep 10 19:34:54.492 INFO kablam! warning: unused import: `std::io::prelude::*`
Sep 10 19:34:54.493 INFO kablam!   --> src/lib.rs:84:9
Sep 10 19:34:54.493 INFO kablam!    |
Sep 10 19:34:54.493 INFO kablam! 84 |     use std::io::prelude::*;
Sep 10 19:34:54.493 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^
Sep 10 19:34:54.493 INFO kablam!    |
Sep 10 19:34:54.493 INFO kablam!    = note: #[warn(unused_imports)] on by default
Sep 10 19:34:54.493 INFO kablam! 
Sep 10 19:34:54.854 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
Sep 10 19:34:54.856 INFO kablam! su: No module specific data is present
Sep 10 19:34:55.842 INFO running `"docker" "rm" "-f" "4f5d46d50b75f837217dd4ca48fb3d9c3685429a20a652a3f311139557147bd6"`
Sep 10 19:34:55.960 INFO blam! 4f5d46d50b75f837217dd4ca48fb3d9c3685429a20a652a3f311139557147bd6