Sep 01 07:00:28.416 INFO checking serial-0.4.0 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 01 07:00:28.416 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 01 07:00:28.416 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-1/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/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 +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 07:00:28.574 INFO blam! baf712d71653cf80588e9e92c02aa847c1090f90549dd8e5e7a0b6d27088dc4a
Sep 01 07:00:28.576 INFO running `"docker" "start" "-a" "baf712d71653cf80588e9e92c02aa847c1090f90549dd8e5e7a0b6d27088dc4a"`
Sep 01 07:00:29.328 INFO kablam!     Checking serial v0.4.0 (file:///source)
Sep 01 07:00:30.328 INFO kablam! warning: unused import: `std::io::prelude`
Sep 01 07:00:30.328 INFO kablam!  --> examples/read_write.rs:6:5
Sep 01 07:00:30.328 INFO kablam!   |
Sep 01 07:00:30.328 INFO kablam! 6 | use std::io::prelude::*;
Sep 01 07:00:30.329 INFO kablam!   |     ^^^^^^^^^^^^^^^^
Sep 01 07:00:30.329 INFO kablam!   |
Sep 01 07:00:30.329 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 01 07:00:30.329 INFO kablam! 
Sep 01 07:00:30.358 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
Sep 01 07:00:30.368 INFO kablam! su: No module specific data is present
Sep 01 07:00:30.866 INFO running `"docker" "rm" "-f" "baf712d71653cf80588e9e92c02aa847c1090f90549dd8e5e7a0b6d27088dc4a"`
Sep 01 07:00:30.951 INFO blam! baf712d71653cf80588e9e92c02aa847c1090f90549dd8e5e7a0b6d27088dc4a