Dec 17 17:28:31.001 INFO checking qnighy/async-stdio-test against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 17:28:31.001 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/qnighy/async-stdio-test:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 17:28:31.504 INFO [stdout] 677b2ded35fc67022d5cab6db0494b67da884c04ffb8941e4b482480574207fb
Dec 17 17:28:31.510 INFO running `"docker" "start" "-a" "677b2ded35fc67022d5cab6db0494b67da884c04ffb8941e4b482480574207fb"`
Dec 17 17:28:33.704 INFO [stderr]     Checking tokio-threadpool v0.1.2
Dec 17 17:28:33.704 INFO [stderr]     Checking tokio-file-unix v0.5.0
Dec 17 17:28:35.056 INFO [stderr]     Checking tokio v0.1.5
Dec 17 17:28:35.802 INFO [stderr]     Checking async-stdio-test v0.1.0 (/opt/crater/workdir)
Dec 17 17:28:36.443 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.88s
Dec 17 17:28:37.658 INFO running `"docker" "inspect" "677b2ded35fc67022d5cab6db0494b67da884c04ffb8941e4b482480574207fb"`
Dec 17 17:28:37.958 INFO running `"docker" "rm" "-f" "677b2ded35fc67022d5cab6db0494b67da884c04ffb8941e4b482480574207fb"`
Dec 17 17:28:38.291 INFO [stdout] 677b2ded35fc67022d5cab6db0494b67da884c04ffb8941e4b482480574207fb