Dec 04 21:00:02.993 INFO checking chris007de/flex against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 21:00:02.993 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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 21:00:03.268 INFO [stdout] 4ad7f5b8c3b095c9aac63e9b32ef0a02da7c9033253f70fc7055e4cf4bc1b29a
Dec 04 21:00:03.273 INFO running `"docker" "start" "-a" "4ad7f5b8c3b095c9aac63e9b32ef0a02da7c9033253f70fc7055e4cf4bc1b29a"`
Dec 04 21:00:04.047 INFO [stderr] usermod: no changes
Dec 04 21:00:04.147 INFO [stderr]     Checking serde v1.0.20
Dec 04 21:00:04.147 INFO [stderr]     Checking bit_reverse v0.1.7
Dec 04 21:00:11.493 INFO [stderr]     Checking serde_json v1.0.6
Dec 04 21:00:13.564 INFO [stderr]     Checking flex v0.1.0 (/source)
Dec 04 21:00:16.746 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.67s
Dec 04 21:00:16.751 INFO [stderr] su: No module specific data is present
Dec 04 21:00:17.237 INFO running `"docker" "inspect" "4ad7f5b8c3b095c9aac63e9b32ef0a02da7c9033253f70fc7055e4cf4bc1b29a"`
Dec 04 21:00:17.592 INFO running `"docker" "rm" "-f" "4ad7f5b8c3b095c9aac63e9b32ef0a02da7c9033253f70fc7055e4cf4bc1b29a"`
Dec 04 21:00:17.874 INFO [stdout] 4ad7f5b8c3b095c9aac63e9b32ef0a02da7c9033253f70fc7055e4cf4bc1b29a