Dec 19 18:05:44.206 INFO checking demostf/sync-rs against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 18:05:44.206 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/demostf/sync-rs:/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 18:05:44.442 INFO [stdout] 9d8a6e0e3ee261232a59c7d1f7ab5886a7ccdc41eaa87d7b46aab60899ab43dc
Dec 19 18:05:44.444 INFO running `"docker" "start" "-a" "9d8a6e0e3ee261232a59c7d1f7ab5886a7ccdc41eaa87d7b46aab60899ab43dc"`
Dec 19 18:05:45.180 INFO [stderr]     Checking net2 v0.2.31
Dec 19 18:05:45.680 INFO [stderr]     Checking mio v0.6.10
Dec 19 18:05:46.932 INFO [stderr]     Checking ws v0.7.3
Dec 19 18:05:48.479 INFO [stderr]     Checking sync v0.1.0 (/opt/crater/workdir)
Dec 19 18:05:49.599 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.50s
Dec 19 18:05:50.618 INFO running `"docker" "inspect" "9d8a6e0e3ee261232a59c7d1f7ab5886a7ccdc41eaa87d7b46aab60899ab43dc"`
Dec 19 18:05:50.852 INFO running `"docker" "rm" "-f" "9d8a6e0e3ee261232a59c7d1f7ab5886a7ccdc41eaa87d7b46aab60899ab43dc"`
Dec 19 18:05:51.089 INFO [stdout] 9d8a6e0e3ee261232a59c7d1f7ab5886a7ccdc41eaa87d7b46aab60899ab43dc