Dec 19 12:16:18.210 INFO checking mtharrison/mio-echo against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:16:18.210 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/mtharrison/mio-echo:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:16:18.390 INFO [stdout] 5e83b69ae69bac430ca5a6561a7d8a9da9fda2bdd13d4a18969772ab4d2255c5
Dec 19 12:16:18.394 INFO running `"docker" "start" "-a" "5e83b69ae69bac430ca5a6561a7d8a9da9fda2bdd13d4a18969772ab4d2255c5"`
Dec 19 12:16:19.027 INFO [stderr]     Checking log v0.4.4
Dec 19 12:16:19.278 INFO [stderr]     Checking mio v0.6.15
Dec 19 12:16:20.521 INFO [stderr]     Checking mio-echo v0.1.0 (/opt/crater/workdir)
Dec 19 12:16:20.950 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.97s
Dec 19 12:16:21.430 INFO running `"docker" "inspect" "5e83b69ae69bac430ca5a6561a7d8a9da9fda2bdd13d4a18969772ab4d2255c5"`
Dec 19 12:16:21.626 INFO running `"docker" "rm" "-f" "5e83b69ae69bac430ca5a6561a7d8a9da9fda2bdd13d4a18969772ab4d2255c5"`
Dec 19 12:16:21.841 INFO [stdout] 5e83b69ae69bac430ca5a6561a7d8a9da9fda2bdd13d4a18969772ab4d2255c5