Sep 04 03:38:30.984 INFO checking serial-0.4.0 against master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c for pr-53893
Sep 04 03:38:30.984 INFO running: cargo +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets
Sep 04 03:38:30.984 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53893/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-3/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/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 +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 03:38:31.157 INFO blam! 65a1e0503f8f3539d3142756f1b4894f3d182ee8da131abfd62bf7701e895021
Sep 04 03:38:31.158 INFO running `"docker" "start" "-a" "65a1e0503f8f3539d3142756f1b4894f3d182ee8da131abfd62bf7701e895021"`
Sep 04 03:38:31.727 INFO kablam!     Checking serial v0.4.0 (file:///source)
Sep 04 03:38:32.930 INFO kablam! warning: unused import: `std::io::prelude`
Sep 04 03:38:32.930 INFO kablam!  --> examples/read_write.rs:6:5
Sep 04 03:38:32.930 INFO kablam!   |
Sep 04 03:38:32.930 INFO kablam! 6 | use std::io::prelude::*;
Sep 04 03:38:32.930 INFO kablam!   |     ^^^^^^^^^^^^^^^^
Sep 04 03:38:32.930 INFO kablam!   |
Sep 04 03:38:32.930 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 04 03:38:32.930 INFO kablam! 
Sep 04 03:38:32.985 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.28s
Sep 04 03:38:32.989 INFO kablam! su: No module specific data is present
Sep 04 03:38:33.439 INFO running `"docker" "rm" "-f" "65a1e0503f8f3539d3142756f1b4894f3d182ee8da131abfd62bf7701e895021"`
Sep 04 03:38:33.579 INFO blam! 65a1e0503f8f3539d3142756f1b4894f3d182ee8da131abfd62bf7701e895021