Dec 18 18:23:32.059 INFO checking async-serialization-0.2.2 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 18:23:32.059 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/async-serialization/0.2.2:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 18:23:32.428 INFO [stdout] 7383b4e9d5708cf2f54a6bfdab3a2a179020d3621c7771172b1be303bf1fff99
Dec 18 18:23:32.436 INFO running `"docker" "start" "-a" "7383b4e9d5708cf2f54a6bfdab3a2a179020d3621c7771172b1be303bf1fff99"`
Dec 18 18:23:34.033 INFO [stderr]     Checking futures-core v0.2.1
Dec 18 18:23:34.572 INFO [stderr]     Checking futures-io v0.2.1
Dec 18 18:23:35.128 INFO [stderr]     Checking async-serialization v0.2.2 (/opt/crater/workdir)
Dec 18 18:23:35.804 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.80s
Dec 18 18:23:36.504 INFO running `"docker" "inspect" "7383b4e9d5708cf2f54a6bfdab3a2a179020d3621c7771172b1be303bf1fff99"`
Dec 18 18:23:36.726 INFO running `"docker" "rm" "-f" "7383b4e9d5708cf2f54a6bfdab3a2a179020d3621c7771172b1be303bf1fff99"`
Dec 18 18:23:37.032 INFO [stdout] 7383b4e9d5708cf2f54a6bfdab3a2a179020d3621c7771172b1be303bf1fff99