Nov 04 17:47:43.415 INFO checking serial-0.4.0 against try#e740b9aa0b624fa39feb39613e76d15bdf57e594 for pr-55655
Nov 04 17:47:43.415 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55655/worker-1/try#e740b9aa0b624fa39feb39613e76d15bdf57e594:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-55655/try#e740b9aa0b624fa39feb39613e76d15bdf57e594:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +e740b9aa0b624fa39feb39613e76d15bdf57e594-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 04 17:47:44.079 INFO blam! aadf636a185f79d6c61fd24fb143a236c84c93656a4f8fb5ba80e90ce08099dc
Nov 04 17:47:44.091 INFO running `"docker" "start" "-a" "aadf636a185f79d6c61fd24fb143a236c84c93656a4f8fb5ba80e90ce08099dc"`
Nov 04 17:47:45.263 INFO kablam! usermod: no changes
Nov 04 17:47:45.324 INFO kablam!     Checking serial v0.4.0 (/source)
Nov 04 17:47:47.565 INFO kablam! warning: unused import: `std::io::prelude`
Nov 04 17:47:47.566 INFO kablam!  --> examples/read_write.rs:6:5
Nov 04 17:47:47.566 INFO kablam!   |
Nov 04 17:47:47.567 INFO kablam! 6 | use std::io::prelude::*;
Nov 04 17:47:47.568 INFO kablam!   |     ^^^^^^^^^^^^^^^^
Nov 04 17:47:47.568 INFO kablam!   |
Nov 04 17:47:47.569 INFO kablam!   = note: #[warn(unused_imports)] on by default
Nov 04 17:47:47.569 INFO kablam! 
Nov 04 17:47:47.860 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 2.57s
Nov 04 17:47:47.864 INFO kablam! su: No module specific data is present
Nov 04 17:47:48.792 INFO running `"docker" "rm" "-f" "aadf636a185f79d6c61fd24fb143a236c84c93656a4f8fb5ba80e90ce08099dc"`
Nov 04 17:47:49.231 INFO blam! aadf636a185f79d6c61fd24fb143a236c84c93656a4f8fb5ba80e90ce08099dc