Dec 04 23:36:01.806 INFO checking Velfi/failure-fern-example against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 23:36:01.806 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-5/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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"`
Dec 04 23:36:02.257 INFO [stdout] b0b939c6e3e28304a9fe30de86c43e888ec15cefdd1c67caf1cb92057e5f50cf
Dec 04 23:36:02.259 INFO running `"docker" "start" "-a" "b0b939c6e3e28304a9fe30de86c43e888ec15cefdd1c67caf1cb92057e5f50cf"`
Dec 04 23:36:03.896 INFO [stderr] usermod: no changes
Dec 04 23:36:03.987 INFO [stderr]    Compiling backtrace-sys v0.1.16
Dec 04 23:36:04.003 INFO [stderr]     Checking fern v0.5.4
Dec 04 23:36:18.421 INFO [stderr]     Checking backtrace v0.3.5
Dec 04 23:36:19.123 INFO [stderr]     Checking failure v0.1.1
Dec 04 23:36:20.004 INFO [stderr]     Checking failure-learn v0.1.0 (/source)
Dec 04 23:36:22.126 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.21s
Dec 04 23:36:22.139 INFO [stderr] su: No module specific data is present
Dec 04 23:36:22.885 INFO running `"docker" "inspect" "b0b939c6e3e28304a9fe30de86c43e888ec15cefdd1c67caf1cb92057e5f50cf"`
Dec 04 23:36:23.121 INFO running `"docker" "rm" "-f" "b0b939c6e3e28304a9fe30de86c43e888ec15cefdd1c67caf1cb92057e5f50cf"`
Dec 04 23:36:23.398 INFO [stdout] b0b939c6e3e28304a9fe30de86c43e888ec15cefdd1c67caf1cb92057e5f50cf