Nov 04 17:47:43.837 INFO checking serial-0.4.0 against master#2ad8c7b3502616aff142a4640cce911c6c2c5463 for pr-55655
Nov 04 17:47:43.839 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55655/worker-7/master#2ad8c7b3502616aff142a4640cce911c6c2c5463:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-55655/master#2ad8c7b3502616aff142a4640cce911c6c2c5463:/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 +2ad8c7b3502616aff142a4640cce911c6c2c5463-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 17:47:44.291 INFO blam! c13e9d5edf4b24818b9982cb06e010f429e6d8ef83fc58b5a138844a87fa914c
Nov 04 17:47:44.293 INFO running `"docker" "start" "-a" "c13e9d5edf4b24818b9982cb06e010f429e6d8ef83fc58b5a138844a87fa914c"`
Nov 04 17:47:45.236 INFO kablam! usermod: no changes
Nov 04 17:47:45.323 INFO kablam!     Checking serial v0.4.0 (/source)
Nov 04 17:47:47.711 INFO kablam! warning: unused import: `std::io::prelude`
Nov 04 17:47:47.711 INFO kablam!  --> examples/read_write.rs:6:5
Nov 04 17:47:47.711 INFO kablam!   |
Nov 04 17:47:47.711 INFO kablam! 6 | use std::io::prelude::*;
Nov 04 17:47:47.711 INFO kablam!   |     ^^^^^^^^^^^^^^^^
Nov 04 17:47:47.711 INFO kablam!   |
Nov 04 17:47:47.711 INFO kablam!   = note: #[warn(unused_imports)] on by default
Nov 04 17:47:47.712 INFO kablam! 
Nov 04 17:47:47.758 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 2.49s
Nov 04 17:47:47.771 INFO kablam! su: No module specific data is present
Nov 04 17:47:48.543 INFO running `"docker" "rm" "-f" "c13e9d5edf4b24818b9982cb06e010f429e6d8ef83fc58b5a138844a87fa914c"`
Nov 04 17:47:48.823 INFO blam! c13e9d5edf4b24818b9982cb06e010f429e6d8ef83fc58b5a138844a87fa914c