Dec 19 12:46:26.936 INFO checking mersinvald/example-tokio-cpupool against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:46:26.936 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/mersinvald/example-tokio-cpupool:/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 12:46:27.117 INFO [stdout] e5d7405ad9c2a242a67fb20027b131d4230db019ee6ce17fb2ebd1bac2be69b4
Dec 19 12:46:27.121 INFO running `"docker" "start" "-a" "e5d7405ad9c2a242a67fb20027b131d4230db019ee6ce17fb2ebd1bac2be69b4"`
Dec 19 12:46:27.904 INFO [stderr]     Checking tokio-io v0.1.3
Dec 19 12:46:28.504 INFO [stderr]     Checking tokio-core v0.1.9
Dec 19 12:46:29.433 INFO [stderr]     Checking arsen_cpupool v0.1.0 (/opt/crater/workdir)
Dec 19 12:46:30.053 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.20s
Dec 19 12:46:30.681 INFO running `"docker" "inspect" "e5d7405ad9c2a242a67fb20027b131d4230db019ee6ce17fb2ebd1bac2be69b4"`
Dec 19 12:46:30.931 INFO running `"docker" "rm" "-f" "e5d7405ad9c2a242a67fb20027b131d4230db019ee6ce17fb2ebd1bac2be69b4"`
Dec 19 12:46:31.284 INFO [stdout] e5d7405ad9c2a242a67fb20027b131d4230db019ee6ce17fb2ebd1bac2be69b4