Oct 31 23:05:35.277 INFO checking plumenator/failure-learn against try#d7816399d50d407bbce1efe9dbadf8faaaf568fc for pr-55538
Oct 31 23:05:35.277 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-7/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-55538/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/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 +d7816399d50d407bbce1efe9dbadf8faaaf568fc-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"`
Oct 31 23:05:35.689 INFO blam! bba305c4182b412652cc18248e96ed1cbed212c569eaa7c8ea95d581f27a13d4
Oct 31 23:05:35.690 INFO running `"docker" "start" "-a" "bba305c4182b412652cc18248e96ed1cbed212c569eaa7c8ea95d581f27a13d4"`
Oct 31 23:05:36.590 INFO kablam! usermod: no changes
Oct 31 23:05:36.723 INFO kablam!     Checking failure-learn v0.1.0 (/source)
Oct 31 23:05:37.436 INFO kablam! warning: unused `#[macro_use]` import
Oct 31 23:05:37.437 INFO kablam!  --> src/main.rs:6:1
Oct 31 23:05:37.437 INFO kablam!   |
Oct 31 23:05:37.437 INFO kablam! 6 | #[macro_use] extern crate matches;
Oct 31 23:05:37.437 INFO kablam!   | ^^^^^^^^^^^^
Oct 31 23:05:37.437 INFO kablam!   |
Oct 31 23:05:37.437 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 31 23:05:37.438 INFO kablam! 
Oct 31 23:05:37.778 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
Oct 31 23:05:37.785 INFO kablam! su: No module specific data is present
Oct 31 23:05:38.446 INFO running `"docker" "rm" "-f" "bba305c4182b412652cc18248e96ed1cbed212c569eaa7c8ea95d581f27a13d4"`
Oct 31 23:05:38.719 INFO blam! bba305c4182b412652cc18248e96ed1cbed212c569eaa7c8ea95d581f27a13d4